Answered: (a) State the null hypothesis Ho and… | bartleby

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 7PPS

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(a) State the null hypothesis Ho and the alternative hypothesis H.
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 critical value. (Round to three or more decimal places.)
(e) Can we conclude that the mean IQ score of this year's class is greater than
that of previous years?
OYes ONo
a <a DoO
Ix

Thanks to an initiative to recruit top students, an administrator at a college dlaims that this year's entering dass must have a greater mean IQ score than that of
entering dlasses from previous years. The administrator tests a random sample of 18 of this year's entering students and finds that their mean IQ score is 115,
with a standard deviation of 13. The college records indicate that the mean 10 score for entering students from previous years is 113.
Is there enough evidence to conclude, at the 0.10 level of significance, that the population mean 1Q score, u, of this year's class is greater than that of previous
years? To answer, assume that the IQ scores of this year's entering dlass are approximately normaly distributed.
Perform a one-tailed test. Then complete the parts below.
Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)

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