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A researcher wants to determine if college students typically drink more than 3 times per week. She collects data on 125 college students. From the sample, she finds that they drank an average of 3.5 times per week, with a standard deviation of 2.3 drinks. Use a 5% significance level for any testing. Based on the scenario above, which of the following is TRUE regarding the type of test that would need to be performed?

a. It is a two-tailed test.
b. It must be completed using the critical value approach.
c. It is a one-tailed test.
d. We reject the null and prove our claim.
e. We would need to estimate the significance level from the data.
f. Hypothesis testing cannot be performed on percentages.

Sagot :

Answer:

C: It is a one-tailed test.

Step-by-step explanation:

We are told the researcher wants to determine if college students typically drink more than 3 times per week.

This means the null hypothesis is;

H0: μ ≥ 3

this indicates that it's a one tailed test as the null hypothesis is only to the right side of 3 and thus just one tail.

This question will be solved using p-value approach since we are given population mean, sample mean, sample size and standard deviation.

We can't reject the null without finding out the p-value and seeing if it is less than the significance value given.

Hypothesis testing can be done done proportions or percentages.

Thus, the correct option is one-tailed test.

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