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.

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.

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Expert Answer

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:

H 48.79
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H 48.79

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Step 3

Alternative hyp...

H 48.79
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H 48.79

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