Question

Consider the following competing hypotheses: Ho: μ = 0, HA: μ ≠ 0. The value of the test statistic is z = −1.46. If we choose a 1% significance level, what is the correct decision and conclusion?

Group of answer choices

Do not reject the null hypothesis; we can conclude that the population mean is significantly different from zero.

Reject the null hypothesis; we can conclude that the population mean is significantly different from zero.

Do not reject the null hypothesis; we cannot conclude that the population mean is significantly different from zero.

Reject the null hypothesis; we cannot conclude that the population mean is significantly different from zero.

The owner of a large car dealership believes that the financial crisis decreased the number of customers visiting her dealership. The dealership has historically had 800 customers per day. The owner takes a sample of 100 days and finds the average number of customers visiting the dealership per day was 750. Assume that the population standard deviation is 310. The value of the test statistic is ________.

Group of answer choices

z = −1.6130

z = 1.6130

t99 = −1.6130

t99 = 1.6130

Answer 1