In a study of healthy subjects grouped by age (Younger 19 50 years, Seniors 65 75 years, and Longeval 85 102 years), Herrmann et al (A 8) measured their vitamin B 12 levels (ng L) All elderly subjects were living at home and able to carry out normal day to day activities The table shows vitamin B 12 levels for 50 subjects in the young group, 92 seniors, and 90 subjects in the longeval group Produce histograms or box plots to examine the distribution of vitamin B 12 levels across groups Examine the shape and spread of these plots Is the normality assumption true for these variables The three groups have a skewed right distribution with outliers on the higher end so the normality assumption does not hold The three groups have a skewed left distribution with outliers on the lower end so the normality assumption does not hold The three groups follow a smooth bell shaped curve and appear symmetric around the middle so the normality assumption holds Each of the three groups has a sample size greater than 30 so the normality assumption holds Reference the same data introduced in Question 7 Suppose you are asked to perform the Kruskal Wallis Non Parametric test Select the correct set of hypotheses appropriate for the test Reference the same data introduced in Question 7 Suppose you are asked to perform the Kruskal Wallis Non Parametric test Select the correct set of hypotheses appropriate for the test Null Median B12 level is the same in all 3 age groups Alternative Median B12 level is different in at least 2 groups Null Median B12 level is different in all 3 age groups Alternative Median B12 level is the same in at least 2 groups Null Median B12 level is the same in at least 2 groups Alternative Median B12 level is different in all 3 groups Null Median B12 level is different in at least 2 groups Alternative Median B12 level is the same in all 3 groups Using SPSS, what is the p value from the Kruskal Wallis test performed in the previous question Use 3 decimal place

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In a study of healthy subjects grouped by age (Younger: 19-50 years, Seniors: 65-75 years, and Longeval: 85-102 years), Herrmann et al. (A-8) measured their

In a study of healthy subjects grouped by age (Younger: 19-50 years, Seniors: 65-75 years, and Longeval: 85-102 years), Herrmann et al. (A-8) measured their vitamin B-12 levels (ng/L). All elderly subjects were living at home and able to carry out normal day-to-day activities. The table shows vitamin B-12 levels for 50 subjects in the young group, 92 seniors, and 90 subjects in the longeval group..

Produce histograms or box plots to examine the distribution of vitamin B-12 levels across groups. Examine the shape and spread of these plots. Is the normality assumption true for these variables?

The three groups have a skewed right distribution with outliers on the higher end so the normality assumption does not hold.

The three groups have a skewed left distribution with outliers on the lower end so the normality assumption does not hold.

The three groups follow a smooth bell shaped curve and appear symmetric around the middle so the normality assumption holds.

Each of the three groups has a sample size greater than 30 so the normality assumption holds.

Reference the same data introduced in Question 7. Suppose you are asked to perform the Kruskal-Wallis Non-Parametric test. Select the correct set of hypotheses appropriate for the test.

Null: Median B12 level is the same in all 3 age groups.

Alternative: Median B12 level is different in at least 2 groups.

Null: Median B12 level is different in all 3 age groups.

Alternative: Median B12 level is the same in at least 2 groups.

Null: Median B12 level is the same in at least 2 groups.

Alternative: Median B12 level is different in all 3 groups.

Null: Median B12 level is different in at least 2 groups.

Alternative: Median B12 level is the same in all 3 groups.

Using SPSS, what is the p-value from the Kruskal-Wallis test performed in the previous question? Use 3 decimal place