Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

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

image text in transcribed

image text in transcribed
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 15 of this year's entering students and finds that their mean IQ score is 114, with standard deviation of 15. The college records indicate that the mean IQ score for entering students from previous years is 110. If we assume that the IQ scores of this year's entering class are normally distributed, is there enough evidence to conclude, at the 0.10 level of significance, that the mean IQ score, J, 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 Ho and the alternative hypothesis H. O P X S (b) Determine the type of test statistic to use. (Choose one) V 0-0 050 020 (c) Find the value of the test statistic. (Round to three or more decimal places.) 10 00 0 X (d) Find the p-value. (Round to three or more decimal places. 0 (e) Can we conclude, using the 0.10 level of significance, that the mean IQ score of this year's class is greater than that of previous years? Yes ONo

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Advanced Engineering Mathematics

Authors: Dennis G Zill, Warren S Wright

5th Edition

1449679781, 9781449679781

More Books

Students also viewed these Mathematics questions

Question

x-3+1, x23 Let f(x) = -*+3, * Answered: 1 week ago

Answered: 1 week ago