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In a busy marketing consulting firm, 30% of the employees are aged 20-29 years, 40% are aged 30-39 years, 20% are aged 40-49 years, and 10% are aged 50 years and over. The personnel manager of the firm is interested in knowing whether age is a factor in the taking of sick days. She takes a random sample of 100 sick days and finds the following distribution of sick days by age group:
Age No. of Sick Days
20-29 years 26
30-39 years 37
40-49 years 24
50 years and over 13
Is it true that majority of individuals that take sick days are 40-49 years?
A researcher wanted to investigate the prevalence of depression among type II diabetic patients and to examine the relationsh
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The value of the standardized test statistic
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The z, t, and F distributions are closely linked. In fact, it is possible to use an F distribution in all cases in which a t or a z could be used.
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Researchers at a university wish to estimate the effect of class size on course comprehension. An intermediate course in statistics can be taught to classes.
Assuming a goal-scoring rate of 206 506 goals per game, what is the probability of Zetterberg scoring 44 or more goals in 89 games?
consider the following. give your answers correct to two decimal places.a find the standard score z such that the area
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