A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 9 of this year's entering students and finds that their mean IQ score is 122, with standard deviation of 9. The college records indicate that the mean IQ score for entering students from previous years is 114. If we assume that the IQ scores of this year's entering class are normally distributed, is there enough evidence to conclude, at the o.05 level of significance, that the mean IQ score, µ, of this year's class is greater than that of previous years? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H1. H :0 H :0 (b) Determine the type of test statistic to use. (Choose one) O=0 Oso D20 (c) Find the value of the test statistic. (Round to three or more decimal places.) ? (d) Find the p-value. (Round to three or more decimal places.) (e) Can we conclude, using the 0.05 level of significance, that the mean IQ score of this year's class is greater than that of previous years? OYes ONo
A college professor claims that the entering class this year appears to be smarter than entering classes from previous years. He tests a random sample of 9 of this year's entering students and finds that their mean IQ score is 122, with standard deviation of 9. The college records indicate that the mean IQ score for entering students from previous years is 114. If we assume that the IQ scores of this year's entering class are normally distributed, is there enough evidence to conclude, at the o.05 level of significance, that the mean IQ score, µ, of this year's class is greater than that of previous years? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.) (a) State the null hypothesis H, and the alternative hypothesis H1. H :0 H :0 (b) Determine the type of test statistic to use. (Choose one) O=0 Oso D20 (c) Find the value of the test statistic. (Round to three or more decimal places.) ? (d) Find the p-value. (Round to three or more decimal places.) (e) Can we conclude, using the 0.05 level of significance, that the mean IQ score of this year's class is greater than that of previous years? OYes ONo
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A college professor claims that the entering class this year appears to be
smarter than entering classes from previous years. He tests a random
sample of 9 of this year's entering students and finds that their mean IQ
score is 122, with standard deviation of 9. The college records indicate
that the mean IQ score for entering students from previous years is 114.
If we assume that the IQ scores of this year's entering class are
normally distributed, is there enough evidence to conclude, at the 0.05
level of significance, that the mean IQ score, µ, of this year's class is
greater than that of previous years?
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places
and round your answers as specified in the table. (If necessary, consult
a list of formulas.)
(a) State the null hypothesis H, and the alternative hypothesis H1.
P
H, :0
H, :0
(b) Determine the type of test statistic to use.
(Choose one)
O=0
OsO O20
(c) Find the value of the test statistic. (Round to three or more decimal places.)
(d) Find the p-value. (Round to three or more decimal places.)
ге
(e) Can we conclude, using the 0.05 level of significance, that the mean IQ score
of this year's class is greater than that of previous years?
OYes ONo
olo
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