A random sample of 88 eighth grade students' scores on a national mathematics assessment test has a mean score of 281. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 275. Assume that the population standard deviation is 40. At a = 0.03, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). ..... (a) Write the claim mathematically and identify Ho and Ha. Choose the correct answer below. A. Ho:µs275 Ha: µ> 275 (claim) O B. Ho: µs275 (claim) Ο C. Ho μ< 275 Hai µ2 275 (claim) Ha: µ> 275 E. Ho: µ= 275 H.u>275 (claim) ΟF. H : μ2 275 (claim) D. Ho: µ= 275 (claim) Hu> 275 H us275
A random sample of 88 eighth grade students' scores on a national mathematics assessment test has a mean score of 281. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 275. Assume that the population standard deviation is 40. At a = 0.03, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). ..... (a) Write the claim mathematically and identify Ho and Ha. Choose the correct answer below. A. Ho:µs275 Ha: µ> 275 (claim) O B. Ho: µs275 (claim) Ο C. Ho μ< 275 Hai µ2 275 (claim) Ha: µ> 275 E. Ho: µ= 275 H.u>275 (claim) ΟF. H : μ2 275 (claim) D. Ho: µ= 275 (claim) Hu> 275 H us275
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:A random sample of 88 eighth grade students' scores on a national mathematics assessment test has a mean score of 281. This
test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more
than 275. Assume that the population standard deviation is 40. At a = 0.03, is there enough evidence to support the administrator's
claim? Complete parts (a) through (e).
.....
(a) Write the claim mathematically and identify Ho and Ha. Choose the correct answer below.
A. Ho: μ 275
Ha: H> 275 (claim)
B. Ho: µs275 (claim)
Hạ: µ> 275
c. H0: μ< 275
Ha: µ2 275 (claim)
D. Ho: µ= 275 (claim)
Ha: µ> 275
E. Ho: μ= 275
Ha: µ > 275 (claim)
F. Ho: µ2 275 (claim)
Hai µ<275
(b) Find the standardized test statistic z, and its corresponding area.
(Round to two decimal places as needed.)
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