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# (Solved): The cost of a daily newspaper varies from city to city. However, the variation among prices remains ...

The cost of a daily newspaper varies from city to city. However, the variation among prices remains steady with a standard deviation of \$0.20. A study was done to test the claim that the mean cost of a daily newspaper is \$1.00. Thirteen costs yield a mean cost of \$0.93 with a standard deviation of \$0.18. Do the data support the claim at the 1% level? Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, however.)

Test statistic is z= -1.261

what is the p-value?

Sketch a picture of the graph. Label and scale the horizontal axis and shade the region(s) corresponding to the p-value.

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