Question

Asked Nov 8, 2019

According to the CTIA-The Wireless Association, the mean monthly revenue per cellphone was $48.79 in 2014. A researcher suspects the mean monthly revenue per cell phone is different today.

(a). Write down the null and alternative hypotheses. Determine whether the hypotheses test is left-tailed, right-tailed, or two-tailed.

(b). Explain what it would mean to make a Type I error.

(c). Explain what it would mean to make a Type II error.

(d) Based on the results of the sample data, the null hypothesis is rejected. State the conclusions based on the results of the test.

Step 1

Hey, since there are multiple sub parts posted, we will answer first 3 sub parts. If you want any specific question to be answered then please submit that question only or specify the question number in your message

Step 2

(a)

From the given information the claim of the test is, the mean monthly revenue per cell phone is different today.

The null and alternative hypothesis is,

Null hypothesis:

Step 3

Alternative hyp...

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