Question

The characteristics of low birth weight children dying of sudden infant death syndrome were examined for both females and males. The ages at time of death for samples of 11 girls and 16 boys are shown below. Note that in order to enter these data in Stata, you should have one column for age and one for sex. You wil have 27 rows. Females Males 53 56 60 60 78 87 102 46 52 58 59 78 80 81 84 103 114 115 133 134 167 175 134 160 277 Test the null hypothesis that the median ages at death are identical for the two populations. What do you conclude? Do you feel that it would have been appropriate to use the two-sample t-test to analyze these data? Why or why not? a. b.

Answer 1

Median₁ = 87 , median₂ = 82.5

Hypothesis:

H0 : median1 = median2

H1 : median1 < median2

Females:

Sample Standard Deviation, s66.132099206471 Variance (Sample Standard), s2 4373.4545454545 Population Standard Deviation, σ |63.054482541648 Variance (Population Standard), σ2| 3975867768595 Total Numbers, N Sum: Mean (Average) Standard Error of the Mean (SE): 19.939578151493 1184 107.63636363636

Males:

Sample Standard Deviation, s 39.465596832347 Variance (Sample Standard), s2 1557.5333333333 Population Standard Deviation, ơ 38212399819954 Variance (Population Standard), σ2| 1460.1875 Total Numbers, N Sum: Mean (Average): Standard Error of the Mean (SEx): 9.8663992080867 16 1556 97.25

- 37 (4 D.3& 0 3226

it is appropriate to do two sample t test