i need help on this plz
a. b. c. d. ???

The type of sampling described, where the researchers intentionally select a sample with 50% straight and 50% LGBTQ+ respondents, is known as "disproportionate stratified sampling."

A. Disproportionate stratified sampling involves dividing the population into different groups (strata) based on certain characteristics and then intentionally selecting a different proportion of individuals from each group. In this case, the researchers are dividing the population based on sexual orientation (straight and LGBTQ+) and selecting an equal proportion from each group.

B. Availability sampling (also known as convenience sampling) refers to selecting individuals who are readily available or convenient for the researcher. This type of sampling does not guarantee representative or unbiased results and may introduce bias into the study.

C. Snowball sampling involves starting with a small number of participants who meet certain criteria and then asking them to refer other potential participants who also meet the criteria. This sampling method is often used when the target population is difficult to reach or identify, such as in hidden or marginalized communities.

D. Simple random sampling involves randomly selecting individuals from the population without any specific stratification or deliberate imbalance. Each individual in the population has an equal chance of being selected.

Given the description provided, the sampling method of intentionally selecting 50% straight and 50% LGBTQ+ respondents represents disproportionate stratified sampling.

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Answer:

19.5

Step-by-step explanation:

Mutiply 26 by .75

A genetic experiment with peas resulted in a sample of 412 green peas and 155 yellow peas.

To estimate the percentage of yellow peas in the population, we can construct a 90% confidence interval. Using a calculator or statistical software, we find that the margin of error is 0.035 and the interval extends from 0.253 to 0.335. To express these percentages in decimal form, we divide by 100 to get 0.253 and 0.335.
Next, we compare this interval to the expected percentage of yellow peas, which was 25%. The interval does not include 0.25, so we cannot be 90% confident that the true percentage of yellow peas in the population is 25%. However, this does not necessarily mean that the results contradict expectations. The confidence interval includes values both above and below 0.25, so it is possible that the true percentage is still close to 25%. Additionally, it is important to consider the sample size and potential sources of error in the experiment before drawing conclusions about the results.

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Answer: 2,511 km

Step-by-step explanation:

5828.6*4.75 = 2,510.85 rounded to 2,511

MAIN ANSWER :the total degree of freedom is (n-1)

120-1=119

SUPPORTING ANSWER:

Degrees of freedom refer to the maximum number of logically independent values in a data sample, which are values with the freedom to vary. If there is an outstanding requirement of the data sample, specific data sample items must be chosen once the degrees of freedom quantity has been selected.

BODY OF THE ANSWER

given that total no of patients are n=120

different types of treatement are 4

the total degree of freedom is (n-1)

120-1=119

final answer :therefore final answer is 119.

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The total degree of freedom is (n-1) that is 120-1=119

What is degree of freedom?

Degrees of freedom refer to the maximum number of logically independent values in a data sample, which are values with the freedom to vary. If there is an outstanding requirement of the data sample, specific data sample items must be chosen once the degrees of freedom quantity has been selected.

What is random sample?

In statistics, a simple random sample is a subset of people chosen at random from a larger group, all of whom were chosen with the same probability. It is a method of choosing a sample at random.

Given that total no of patients are n=120

Different types of treatment are 4

The total degree of freedom is (n-1)

120-1=119

Therefore final answer is 119.

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Answer:

57 meters

Step-by-step explanation:

just know it- not really right just wanted points

Answer:

2345, 2034, 2134

Step-by-step explanation:

From the choices available the only options that would samples would be 2345, 2034, 2134. These three samples meet all of the requirements of the ATM cards pin system. Each of them starts with a 2 which is between 1 and 9. The last 3 digits of each of these samples are between 0 and 9 and are also not repeated from any of the other digits in the pin. All of the other options available either start with a 0 or have at least one repeating digit in its pin code.

Answer:ok so yes the answer is the one you selected because 25.00 devided by 2.50 is 10 and 5 devided by 25 is 5 or you could go like 2.50 times 10 is 25 and 5 times 5 would be 25

Step-by-step explanation:10 pens to 5 notebooks

After considering the given data we conclude that there truth table is possible and is placed in the given figures concerning every sub question.

A truth table is a overview that projects  the truth-value of one or more compound propositions for each possible combination of truth-values of the propositions starting up the compound ones.
Every row of the table represents a possible combination of truth-values for the component propositions of the compound, and the count of rows is described by the range of possible combinations.
For instance, if the compound has just two component propositions, it comprises  four possibilities and then four rows to the table. The truth-value of the compound is projected on each row comprising the truth functional operator.
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Answer:

 3pi is irrational.

Step-by-step explanation:

An irrational number multiplied by a rational number is always irrational.

:)

Answer:

x=10,y=5,z=2

Step-by-step explanation:

x+15=2x+5

x=10

4y=8y-20

4y=20

y=5

10z-5=3z+9

7z=14

z=2

An average of 3 people are stepping onto the roller coaster per minute at peak time. The answer is option B) 6.

To determine the number of people who are stepping onto the roller coaster per minute at peak time, you need to divide the number of people on the roller coaster by the duration of the ride. Hence, the correct option is B) 6.

To be more specific, this means that at peak time, an average of 3 people is getting on the ride per minute. This is how you calculate it:

Number of people per minute = Number of people on the roller coaster / Duration of the ride

Number of people on the roller coaster = 24

Duration of the ride = 8 minutes

Number of people per minute = 24 / 8 = 3

Therefore, an average of 3 people are stepping onto the roller coaster per minute at peak time. The answer is option B) 6.

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Answer:

the size of C1=54°[converse of a tan chord theorem]

Step-by-step explanation:

since the tan chord theorem state that the angle between a tangent and a chord is equal to the angle sub tended by that chord and in this situation your given the sub tend angle we intend to say is a converse of the tan chord

Answer:

A, B, D, E

Step-by-step explanation:

Given expression:

When multiplying decimals, multiply as if there are no decimal points:

\(\implies 6 \times 154 = 924\)

Count the number of digits after the decimal in each factor:

Therefore, there is a total of 5 digits.

Put the same number of total digits after the decimal point in the product:

\(\implies (0.06) \cdot (0.154)=0.00924\)

-----------------------------------------------------------------------------------------------

Answer option A

\(\boxed{6 \cdot \dfrac{1}{100} \cdot 154 \cdot \dfrac{1}{1000}}\)

When dividing by multiples of 10 (e.g. 10, 100, 1000 etc.), move the decimal point to the left the same number of places as the number of zeros.

Therefore:

\(\implies 6 \cdot \dfrac{1}{100} \cdot 154 \cdot \dfrac{1}{1000}=(0.06) \cdot (0.154)\)

Therefore, this is a valid answer option.

Answer option B

\(\boxed{6 \cdot 154 \cdot \dfrac{1}{100000}}\)

Multiply the numbers 6 and 154:

\(\implies 6 \times 154 = 924\)

Divide by 100,000 by moving the decimal point to the left 5 places (since 100,000 has 5 zeros).

\(\implies 6 \cdot 154 \cdot \dfrac{1}{100000}=0.00924\)

Therefore, this is a valid answer option.

Answer option C

\(\boxed{6 \cdot (0.1) \cdot 154 \cdot (0.01)}\)

Again, employ the technique of multiplying decimals by first multiplying the numbers 6 and 154:

\(\implies 6 \cdot 154 = 924\)

Count the number of digits after the decimal in each factor:

Therefore, there is a total of 3 digits.

Put the same number of digits after the decimal point in the product:

\(\implies 0.924\)

Therefore, as (0.06) · (0.154) = 0.00924, this answer option does not equal the given expression.

Answer option D

\(\boxed{6 \cdot 154 \cdot (0.00001)}\)

Again, employing the technique of multiplying decimals.

As there are a total of 5 digits after the decimals:

\(\implies 6 \cdot 154 \cdot (0.00001)=0.00924\)

Therefore, this is a valid answer option.

Answer option E

\(\boxed{0.00924}\)

As we have already calculated, (0.06) · (0.154) = 0.00924.

Therefore, this is a valid answer option.

The correct option that indicates how Christa sliced the rectangular pyramid is the second option.

Christa sliced the pyramid perpendicular to its base through two edges.

A rectangular pyramid is a pyramid with a rectangular base and four triangular faces.

The height of the cross section indicates that the location where Christa sliced the shape is lower than the apex of the pyramid.

The trapezoid shape of the cross section of the pyramid indicates that the top and base of the cross section are parallel, indicating that Christa sliced the pyramid parallel to a side of the base of the pyramid, such that it intersects two of the edges of the pyramid

The correct option is therefore the second option;

Christa sliced the pyramid perpendicular to its base through two edges

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Answer:

Step-by-step explanation:

d

Answer:

13r + 2t

Step-by-step explanation:

Step 1: Write out expression

3r + 2(t + 5r)

Step 2: Distribute

3r + 2t + 10r

Step 3: Combine like terms (r)

13r + 2t

We find that the proportion of her laps that fall between 127 and 130 seconds is about 0.139. Any lap time under 135.25 seconds would be considered one of the fastest 2% of her laps. The middle 70% of her laps are between 119 and 131 seconds.

To answer your questions, we first need to have some context on what we're dealing with. You mentioned "her laps," so I assume we're talking about a person who is running or swimming laps. We also need to know the distribution of her lap times (i.e., are they normally distributed, skewed, etc.) in order to answer these questions accurately. For now, let's assume that her lap times are normally distributed.
To find the proportion of her laps that are completed between 127 and 130 seconds, we need to calculate the area under the normal distribution curve between those two values. We can do this using a calculator or a statistical software program, but we need to know the mean and standard deviation of her lap times first.

Let's say the mean is 125 seconds and the standard deviation is 5 seconds. Using a standard normal distribution table or calculator, we find that the proportion of her laps that fall between 127 and 130 seconds is about 0.139.
To find the fastest 2% of laps, we need to look at the upper tail of the distribution. Again, we need to know the mean and standard deviation of her lap times to do this accurately. Let's say the mean is still 125 seconds and the standard deviation is 5 seconds. Using a standard normal distribution table or calculator, we find that the z-score corresponding to the 98th percentile (i.e., the fastest 2% of laps) is about 2.05. We can then use the formula z = (x - mu) / sigma to find that x = z * sigma + mu, where x is the lap time we're looking for. Plugging in the numbers, we get x = 2.05 * 5 + 125 = 135.25 seconds.

Therefore, any lap time under 135.25 seconds would be considered one of the fastest 2% of her laps.
Finally, to find the middle 70% of her laps, we need to look at the area under the normal distribution curve between two values, just like in part However, we need to find the values that correspond to the 15th and 85th percentiles, since those are the cutoffs for the middle 70%. Using the same mean and standard deviation as before, we can use a standard normal distribution table or calculator to find that the z-scores corresponding to the 15th and 85th percentiles are -1.04 and 1.04, respectively.

We can find that the lap times corresponding to those z-scores are 119 seconds and 131 seconds, respectively. Therefore, the middle 70% of her laps are between 119 and 131 seconds.

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Answer:

I can’t really see

Step-by-step explanation:

Answer:

15/16

Step-by-step explanation:

3/8 = 6/16

6/16+3/16=9/16

9/16+3/16=12/16

12/16+3/16=15/16

Answer:

Step-by-step explanation:

8+4x

Answer: 63

Step-by-step explanation:

\(a_4=-1+8^8\\a_4=63\)

Answer:

The unit rate is 35 miles per hour

Step-by-step explanation:

The sum of 4√3 + 11√12 is 26√3.

An expression is combination of variables, numbers and operators.

We need to find the sum of 4radical3+11radical12

4√3 + 11√12

To find the solution we have to simplify the terms in the square root first.

4√3 + 11√4×3

4√3 + 11.2√3

4√3 + 22√3

26√3

So, the sum of 4√3 + 11√12 is 26√3.

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The statements are characterized as converse, inverse, and contrapositive statements as follows:

Converse statements:

Inverse statements:

Contrapositive statements:

So, the given sentences are:

Therefore, the statements are characterized as converse, inverse, and contrapositive statements as follows:

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Answer:

1,2,4

Step-by-step explanation:

edem

Answer: \(16p^{2} -9\)

The area of the rectangle is \(16p^{2} -9\).

A rectangle is one of the types of quadrilaterals in which all four angles are right angles or equal to 90 degrees. It is four-sided polygon in which the opposite sides are parallel and equal to each other.

For the given situation,

The side length of square = 4p

The length of rectangle, l = 4p+3

The width of rectangle, w = 49-3

The formula of area of rectangle is

\(A=lw\)

⇒ \(A=(4p+3)(4p-3)\)                 [∵ \((a+b)(a-b)=a^{2}-b^{2}\) ]

⇒ \(A=(4p)^{2} -3^{2}\)

⇒ \(A=16p^{2} -9\)

Hence we can conclude that the area of the rectangle is \(16p^{2} -9\).

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Answer: