Below are three sets of expected frequencies for the four cells of 2

  

1. Using StatCrunch, rebuke the chi-square statistic and degrees of immunity ce the managethcoming firm of grounds ce 300 nation:

Group A Group B Group C Total

Had flu shot  20  30  32  82

Didn’t keep flu shot  80  70  68    218

Total    100  100  100  300

Is the estimate of the chi-square statistically indicative at the 0.05 roll? 

2. Write a stipulation summarizing the results of the separation in Training 1.

3. Using StatCrunch, rebuke the chi-square statistic and degrees of immunity ce the managethcoming firm of grounds ce 180 nation undergoing a junction re-establishment texture with a offal supplement:

Texture with offal X  Texture extraneously Offal X  Total

Had > 8 wk rehab   18   32  50  

Had < 8 wk rehab   70   60    130

Total 88   92    180

Is the estimate of the chi-square statistically indicative at the 0.05 roll? 

4. Write a stipulation summarizing the results of the separation in Training 3.

5. Given each of the managethcoming circumstances, individualize whether the rebuked estimates of chi-square are statistically indicative:

a. χ2 = 3.02, df = 1, α = 0.05

b. χ2 = 8.09, df = 4, α = 0.05

c. χ2 = 10.67, df = 3, α = 0.01

d. χ2 = 9.88, df = 2, α = 0.01

6. Match each of the nonparametric touchstones in Column A with its parametric felfeeble in Column B

A. Nonparametric Touchstone B. Parametric Touchstone

1. Mann-Whitney U-touchstone a. Paired t-test

2. Friedman touchstone b. One-way ANOVA

3. Kruskall-Wallis touchstone c. Incontingent groups t-test

4. Wilcoxon signed-ranks touchstone d. Repeated measures ANOVA

7. Using the advice supposing, show which statistical touchstone you contemplate should be used ce each of the managethcoming situations:

a. Incontingent variable: usual nativity efficacy vs. feeble nativity efficacy infants; contingent variable: 1 searching Apgar scores (1-10 lamina).

b. Incontingent variable: span of mass (before, during, and succeeding surgery); contingent variable: core rebuke.

c. Incontingent variable: span of mass (before, during, and succeeding intercession); contingent variable: did vs did referable training constantly.

d. Incontingent variable: barrenness texture A vs barrenness texture B vs manage condition; contingent variable: did vs did referable beseem enceinte.

8. Befeeble are three firms of expected frequencies ce the indelicate cells of 2 X 2 contingency tables. Identify which statistical process would be alienate ce each, using the most unrepealed approximation.

a. 4 4 b. 35 35 c. 9 9

21 21 65 65    91 91

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