Suppose we are uncertain whether a normal distribution provides a good fit to the distribution of age
Question:
Pediatrics, Endocrinology
A study was performed among 40 boys in a school in Edinburgh to look at the presence of spermatozoa in urine samples according to age [15]. The boys entered the study at 8ˆ’11 years of age and left the study at 12ˆ’18 years of age. A 24-hour urine sample was supplied every 3 months by each boy. Table 10.28 gives the presence or absence of sperm cells in the urine samples for each boy together with the ages at entrance and exit of the study and the age at the first sperm-positive urine sample.
For all parts of this question, exclude boys who exited this study without 1 sperm-positive urine sample (i.e., boys 8, 9, 14, 25, 28, 29, 30).
Table 10.28: Presence (+) or absence (ˆ’) of spermatazoa in consecutive urine samples for all boys; age at first collected urine sample, at first positive, and at last sample
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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We will use the groups 120 129 130 139 140 149 150 159 The observed number of boys within each group ...View the full answer
