Suppose that an accounting firm does a study to determine the time needed to complete one person’s tax forms. It randomly surveys 64 people. The sample mean is 26.75
hours. There is a known standard deviation of 4.75 hours. The population distribution is assumed to be normal.
a. Find the following values. (Enter exact answers)
i. Enter your answer
ii. Enter your answer
iii. Enter your answer
b. In words, define the random variables and :

…

Ask by Olson Smith. in the United States

Mar 29,2025

Question

Suppose that an accounting firm does a study to determine the time needed to complete one person’s tax forms. It randomly surveys 64 people. The sample mean is 26.75
hours. There is a known standard deviation of 4.75 hours. The population distribution is assumed to be normal.
a. Find the following values. (Enter exact answers)
i. Enter your answer
ii. Enter your answer
iii. Enter your answer
b. In words, define the random variables and :

…

Ask by Olson Smith. in the United States

Mar 29,2025

UpStudy AI · Accepted Answer

**a. Values:**

i. The sample mean  
$$
\bar{x}=26.75 \, \text{hours}
$$

ii. The standard deviation  
$$
\sigma=4.75 \, \text{hours}
$$

iii. The sample size  
$$
n=64
$$

**b. Definitions of the random variables:**

$$X$$ is a random variable representing the time (in hours) needed to complete one person's tax forms.

$$\bar{X}$$ is the sample mean of the time required to complete tax forms for a randomly selected sample of 64 people.
**a. Values:** i. Sample mean: 26.75 hours ii. Standard deviation: 4.75 hours iii. Sample size: 64 **b. Definitions:** $$X$$ is the time (in hours) it takes to complete one person's tax forms. $$\bar{X}$$ is the average time (in hours) it takes to complete tax forms for a group of 64 people.

Upstudy AI Solution

Answer

Solution

Extra Insights

Related Questions

Latest Statistics Questions