## Statistics for Management and Economics Web Quizzing Chapter 12

May 17, 2018

**Statistics for Management and Economics Web Quizzing Chapter 12 for $3 Only (Instant Download)**

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**WebQuizzing** – Ch. 12

**Book ISBN-**10 0538477490

**Book ISBN-**13 9780538477499

**Author:** Gerald Keller

**Title:** Statistics for Management and Economics

**Ed:** 9e

- The expected value of the difference of two sample means equals the difference of the corresponding population means when:

- the populations are normally distributed.
- the samples are independent.
- the populations are approximately normal and the sample sizes are large.
- All of these choices are true.

- In testing the difference between the means of two normally distributed populations, the number of degrees of freedom associated with the unequal-variances
*t-*test statistic usually results in a non-integer number. It is recommended that you:

- round to the nearest integer.
- change the sample sizes until the number of degrees of freedom becomes an integer.
- assume that the population variances are equal, and then use
*df*=. - None of these choices.