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A cell phone company states that the mean cell phone bill of all their customers is...

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Statistics

A cell phone company states that the mean cell phone bill of alltheir customers is less than $83. A sample of 19 customers gives asample mean bill of $82.17 and a sample standard deviation of$2.37. At ? = 0.05 , test the company’s claim?

1). State the hypothesis and label which represents the claim: :H 0 : H a

2). Specify the level of significance  =

3). Sketch the appropriate distribution, find and label theCritical Value(s) in Statdisk to 3 decimal places, and shade in to indicate the Rejection Region(s)

4.) Calculate the test statistic (to 3 decimal places). Labelthis appropriately as Z or t.

5). Decision: Reject Ho or Do Not Reject Ho (You do not have towrite a statement):

6). In the distribution below, label the test statistic youcalculated from part (4). Using Statdisk, find the P-valuecorresponding to the test statistic. Shade in and label the P-valuein the distribution.

Answer & Explanation Solved by verified expert
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Solution 83 8217s 237n 19This is the left    See Answer
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