A random sample of 89 eighth grade students' scores on a national mathematics assessment test has a mean score of 262. 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 260. Assume that the population standard deviation is 35. At α=0.13, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). (a) Write the claim mathematically and identify H0 and Ha. (b) Find the standardized test statistic z, and its corresponding area. z= (c) Find the P-value. P-value= (d) Decide whether to reject or fail to reject the null hypothesis. (e) Interpret your decision in the context of the orginal claim.
A random sample of 89 eighth grade students' scores on a national mathematics assessment test has a
Assume that the population standard deviation is 35. At α=0.13, is there enough evidence to support the administrator's claim? Complete parts (a) through (e).
(a) Write the claim mathematically and identify H0 and Ha.
(b) Find the standardized test statistic z, and its corresponding area.
z=
(c) Find the P-value.
P-value=
(d) Decide whether to reject or fail to reject the null hypothesis.
(e) Interpret your decision in the context of the orginal claim.
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