7. [0.771.42 Points] DETAILS PREVIOUS ANSWERS ILLOWSKYINTROSTAT1 9.5.076.HW. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER
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- 7 0 771 42 Points Details Previous Answers Illowskyintrostat1 9 5 076 Hw My Notes Ask Your Teacher Practice Another 1 (125.58 KiB) Viewed 114 times
the graph of the situation. Label the point estimate and the lower
and upper bounds of the confidence interval. (Round your lower and
upper bounds to two decimal places.)
A________ B______ C________?
7. [0.771.42 Points] DETAILS PREVIOUS ANSWERS ILLOWSKYINTROSTAT1 9.5.076.HW. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 $0.96 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.) Part(a) Part (b) Part (c) Part (d) State the distribution to use for the test. (Round your answers to four decimal places.) X-N v, 1 -0.7211 1x ) Part (e) What is the test statistic? (If using the z distribution round your answers to two decimal places, and if using the t distribution round your answers to three decimal places.) zv = -2.58 x Part (1) Part (g) O Part (h) Indicate the correct decision ("reject" or "do not reject" the null hypothesis), the reason for it, and write an appropriate conclusion. (1) Alpha: a = 47152 x (ii) Decision O reject the null hypothesis O do not reject the null hypothesis H Type here to search о iT a 57°F Cloudy ^ 1» 20* 12:47 AM 11/10/2021 C