exists between the mean exercise times of all tattooed and non-tattooed students

Question

exists between the mean exercise times of all tattooed and non-tattooed students D Question 5 1 pts It is desired to compare the average amount of time students with a tattoo and students without a tatto exercise per week. Random and independent samples were selected and the data was analyzed in the Statistix software and the following printout was generated: Two-Sample T Tests for Exercise by Tattoo Tattoo No N Mean SD SE 60 7.1167 4.7160 0.6088 22 6.6364 3.5395 0.7546 Difference 0.4803 4.43741.1060 T-Tests for Mean Difference Null Hypothesis: difference 0 Alternative Hyp: difference Lower Upper Method Variances DF T P 95% C.1, 95% C.1. Pooled Satterthwaite Unequal 49.7 0.50 0.6225 -1.4675 2.4281 Homogeneity of Variances DF FP Folded F Test Which of the following assumptions is necessary for this printout to be valid? Equal 80 043 0.6653 1.72072.6813 59.21 1.78 0.0731 888 Fa 6 7 9

Explanation / Answer

option 2 is correct:

The exercise time of tattooed student and the exercise time of all non-tattooed students both need to be approximately normally distributed.

Reason:

This example of the paired t-test and the assumption of t-test are,

1) The dependent variables must be continuous interval or ratio.

2) The dependent variable follows the approximately normal distribution.

3) The dependent variable does not contain outliers.

If the variance of two variable same or not same it doesn't matter for t-test because we can perform a

t-test for both equal and unequal type of variances.

so option 3rd incorrect

the first option also incorrect because we need dependent variable follows an approximately normal distribution, not for the average of the variable.

>>>>>>>>>>>>> Best Luck >>>>>>>>>>>>>

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