14. Give the most appropriate null hypothesis for the above SPSS output. 15. Giv

Question

14. Give the most appropriate null hypothesis for the above SPSS output.
15. Give the most appropriate alternative hypothesis for the above SPSS output.
16. Give the confidence interval for the difference between the population means.
17. Is the test one-tailed or two-tailed?
18. Give and interpret the result of the hypothesis test.
19. In this case, what would a type 1 error mean? Can a type 1 error occur with the above SPSS output?
20. What is the probability the means are equal? Different
Group Statistics Std. Ermor Mean Std. Deviation Mean Number of Brothers and Sisters Respondents Sex 1 Male Female 641 854 3.71 3.71 2.915 3.031 115 104 Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Confdence Interval of the Mean Std. Error Lower T Upper of l sig (2-tailed) | Difference | Differen -.001 156 307 304 Number of Brothers Equal vanances and Sisters 335 563 -009 1493 993 assumed Equal variances not assurmed 155 305 303 993 001 -009 1405.679 14. Give the most appropriate null hypothesis for the above SPSS output. 15. Give the most appropriate alternative hypothesis for the above SPSS output 16. Give the confidence interval for the difference between the population means. 17. Is the test one-tailed or two-tailed?

Explanation / Answer

Solution- 14. Null Hypothesis- mean difference is zero ie. there is no difference between number of brothers and sisters.

15. Alternative Hypothesis- mean difference is not equal to zero ie. there is a difference between number of brothers and sisters.

16. 95% required confidence interval is-

( -.307 , .304 )

17. The test is a two tailed test.

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