A random sample of 88 eighth grade students' scores on a national mathematics assessment test has a mean score of 288. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam
A random sample of 88 eighth grade students' scores on a national mathematics assessment test has a mean score of 288. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
11.
A random sample of
88
eighth grade students' scores on a national mathematics assessment test has a mean score of
288.
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
280.
Assume that the population standard deviation is
36.
At
α=0.09,
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.
Choose the correct answer below.H0:
μ≤280
Ha:
μ>280
(claim)H0:
μ=280
Ha:
μ>280
(claim)H0:
μ=280
(claim)Ha:
μ>280
H0:
μ<280
Ha:
μ≥280
(claim)H0:
μ≥280
(claim)Ha:
μ<280
H0:
μ≤280
(claim)Ha:
μ>280
(b) Find the standardized test statistic z, and its corresponding area.
z=enter your response here
(Round to two decimal places as needed.)Expert Solution
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