2.3 x (-1.2) Just multiply -27.6 -2.76 2.76 27.6

A researcher works on a study that has a population standard deviation of 0.73a sample mean of 84.5 and a sample size of 60 .Wha

Firlakuza [10]

Answer:

$ME = z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

The critical value can be founded in the normal standard distribution table using the value of $\alpha/2 =0.025$ and we got $z_{\alpha/2}=1.96$ . Replacing the info given we got:

$ME = 1.96 \frac{0.73}{\sqrt{60}}= 0.185$

Step-by-step explanation:

For this case we have the following info given:

$\sigma = 0.73$ represent the population deviation

$\bar X = 84.5$ represent the sample mean

$n =60$ represent the sample size

And we want to find the margin of error for a confidence level of 95%. So then the significance level would be $\alpha=1-0.95 = 0.05$ and $\alpha/2 =0.025$ . The margin of error is given by:

$ME = z_{\alpha/2} \frac{\sigma}{\sqrt{n}}$

The critical value can be founded in the normal standard distribution table using the value of $\alpha/2 =0.025$ and we got $z_{\alpha/2}=1.96$ . Replacing the info given we got:

$ME = 1.96 \frac{0.73}{\sqrt{60}}= 0.185$

6 0

4 years ago

The scale of a town map is 1 inch to 4 miles. On the map, the park and the airport are 6 inches apart. What is the actual distan

kenny6666 [7]

Answer:

24 miles because 4x6=24 and 1 inch is 4 miles so if it were 6 inches the distance would be 24 miles

Step-by-step explanation:

4x6=24 and 1 inch is 4 miles so if it were 6 inches the distance would be 24 miles

8 0

3 years ago

(PLEASE HELP)What is the surface area?

Gala2k [10]

Answer:

it would be six square yards or add all the numbers and your total will be it

Step-by-step explanation:

3 0

2 years ago

Catherine Chao, Director of Marketing Research, needs a sample of households to participate in the testing of a new toothpaste p

sleet_krkn [62]

Answer:

Convenience sampling.

Step-by-step explanation:

In Statistics, sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.

There are various types of sampling used by researchers and these are;

1. Random sampling.

2. Systematic sampling.

3. Stratified sampling.

4. Cluster sampling.

5. Quota sampling.

6. Convenience (opportunity) sampling.

Convenience sample can be defined as a sampling technique in which the representatives to be used are easily accessible. For example, a researcher using a social media poll such as Twitter polls.

In this scenario, Catherine Chao, Director of Marketing Research, chooses thirty-six of her closest friends to participate in the testing of a new toothpaste package. Thus, Catherine's sample is a convenience sampling.

4 0

3 years ago

Explain how to round a number when three is a digit to the right of the rounding place

timurjin [86]

Answer:

if the number is 5 or higher, you round up.

if the number is 4 or lower, you round down.

96.57 → 96.6

96.53 → 96.5

7 0

3 years ago