Aresearcher collated data on americans' leisure time activities. she found the mean number of hours spent watching television each weekday to be 2.7 hours with a standard deviation of 0.2 hours. jonathan believes that his football team buddies watch less television than the average american. he gathered data from 40 football teammates and found the mean to be 2.3. which of the following are the correct null and alternate hypotheses?
a. h0: u=2.7; ha: u < 2.7
b. h0: u ≠ 2.7; ha: u=2.3
c. h0: u=2.7; ha: u≠ 2.7
d. h0: u=2.7; ha: u≥ 2.3

A.

Step-by-step explanation:

Let be the population mean.

Given : A researcher collated data on Americans' leisure time activities. She found the mean number of hours spent watching television each weekday to be 2.7 hours with a standard deviation of 0.2 hours.

i.e.

Jonathan believes that his football team buddies watch less television than the average American.

i.e.

Since, the null hypotheses contains equals to sign.

Then, the correct null and alternate hypotheses will be :-

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step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )