Find the Critical Value of Z Value

find the critical value of z value. Assume that the normal distribution applies. right tailed test a=0.005

which of the following is the hypothesis test to be conducted. Less than 30% of internet users pall bills online. Express the null hypothesis.

which of the following is the hypothesis test to be conducted. Less than 30% of internet users pall bills online. Express the null hypothesis

The heights were measured for nine supermodels. They have a mean of 68.5in. and a standard deviation of 2.7 in. use the traditional method and a 0.01 significance level to test the claim that supermodels have heights with a mean that is greater than the mean of 63.6 in. for women from the general population

1. The heights were measured for nine supermodels. They have a mean of 68.5 inches, and a standard deviation of 2.7 inches. Use the traditional method and a 0.01 significance level to test the claims that supermodels have heights with a mean that is greater than the mean of 63.6 inches for women from the general population.

A. Do not reject Ho since the test statistic 0.184 in not greater than the critical value 2.896.

B. Reject Ho since the test statistic 5.444 is greater than the critical value 2.896.

C. Reject Ho since the test statistic 0.184 is not greater than the critical value 2.896.

D. Do not reject Ho since the test statistic 5.444 is greater than the critical value 2.896.

2. In order to monitor the ecological health of a particular region, various measurements are recorded at different times. The bottom temperatures are recorded and the mean of 30.394 degrees C is obtained for 61 temperatures recorded on 61 different days. Assuming that ó 1.7 degree C, test the claim that the population mean is greater than 30.0 degree C. Use a 0.05 significance level and the displayed results.

A. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim.

B. Reject the null hypothesis. There is sufficient evidence to support the...