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 ï¡ =
3). Sketch the appropriate distribution, find and label theCritical Value(s) in Statdisk to 3 decimal places, and shade in ï¡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.
