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Froggy Jumps
Froggy Jumps

Test Statistics: Population Mean (Z vs t)

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Test Statistics: Population Mean (Z vs t)

Froggy Jumps

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About this activity

A quick 10-item quiz on mean tests and critical values.

Created by

melody arais
melody arais
Philippines

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Test Statistics: Population Mean (Z vs t)
 

Froggy Jumps

Test Statistics: Population Mean (Z vs t)Online version

A quick 10-item quiz on mean tests and critical values.

by melody arais
1

If the population SD is known and n is large, the test statistic for a single mean is a:

2

A sample mean is 105, population mean 100, SD known 15, n=36. The z value is:

3

When SD is unknown and sample size is small, you should use a:

4

Which statement describes a critical value?

5

For a 95% two-tailed test with unknown SD, the critical t-value depends on:

6

If t-statistic > t_crit (df=20, alpha=.05), we:

7

The null hypothesis for testing a single mean is usually:

8

With known SD and small n, the correct approach is:

9

In a z-test, the test statistic is calculated as:

10

Critical value for a one-sided z-test at alpha=0.05 is:

11

Given : sample mean = 310 ; population mean = 307 ; s = 40 ; sample size n= 26

12

what is the value of the test statistic in number 11?

13

Given : sample mean = 67.5 ; population mean = 62.5; standard deviation = 8 ; n = 50 , what test statistic must be used?

14

given: Ho = 120 ; Ha # 120 ; z computed = 2.33; z-critical value = 1.96. What conclusion can be drawn from the given information?

15

Given : Ho = 205 ; Ha > 205 ; Z computed = 2.000 ; Z critical value = 2.015. What conclusion can be drawn from the given information?

 
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