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Question A magazine editor was wondering if the number of ads in the magazine had gone up in the past few years. Historically, the magazine has had a mean of 85 ads per issue with a standard deviation of 11 ads per issue. The editor randomly selected 10 magazines from the last two years and counted the ads. The editor conducts a one-mean hypothesis at the 5% significance level, to test if the average number of ads in a magazine is greater than 85 ads. (a) H0 : ? = 85; Ha : ? > 85, which is a right-tailed test. (b) z0 = 1.667, p-value is = 0.048. (c) Which of the following are appropriate conclusions for this hypothesis test? Select all that apply. Select all that apply: We reject H0. We fail to reject H0. At the 5% significance level, the data provide sufficient evidence to conclude that the average number of ads in a magazine is greater than 85 ads. At the 5% significance level, the data do not provide sufficient evidence to conclude that the average number of ads in a magazine is greater than 85 ads.

          Question

A magazine editor was wondering if the number of ads in the magazine had gone up in the past few years. Historically, the magazine has had a mean of 85 ads per issue with a standard deviation of 11 ads per issue. The editor randomly selected 10 magazines from the last two years and counted the ads.

The editor conducts a one-mean hypothesis at the 5% significance level, to test if the average number of ads in a magazine is greater than 85 ads.

(a) H0 : ? = 85; Ha : ? > 85, which is a right-tailed test.
(b) z0 = 1.667, p-value is = 0.048.

(c) Which of the following are appropriate conclusions for this hypothesis test? Select all that apply.

Select all that apply:

We reject H0.
We fail to reject H0.
At the 5% significance level, the data provide sufficient evidence to conclude that the average number of ads in a magazine is greater than 85 ads.
At the 5% significance level, the data do not provide sufficient evidence to conclude that the average number of ads in a magazine is greater than 85 ads.

Question

A magazine editor was wondering if the number of ads in the magazine had gone up in the past few years. Historically, the magazine has had a mean of 85 ads per issue with a standard deviation of 11 ads per issue. The editor randomly selected 10 magazines from the last two years and counted the ads.

The editor conducts a one-mean hypothesis at the 5% significance level, to test if the average number of ads in a magazine is greater than 85 ads.

(a) H0 : ? = 85; Ha : ? > 85, which is a right-tailed test.
(b) z0 = 1.667, p-value is = 0.048.

(c) Which of the following are appropriate conclusions for this hypothesis test? Select all that apply.

Select all that apply:

We reject H0.
We fail to reject H0.
At the 5% significance level, the data provide sufficient evidence to conclude that the average number of ads in a magazine is greater than 85 ads.
At the 5% significance level, the data do not provide sufficient evidence to conclude that the average number of ads in a magazine is greater than 85 ads.

Added by David S.

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