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A company is sued for job discrimination because only 19% of the newly hired candidates were minorities when 27% of all applicants were minorities. Is this strong evidence that the company's hiring practices are discriminatory?
a) Is this a one-tailed or a two-tailed test? Why?
b) In this context, what would a Type I error be?
c) In this context, what would a Type II error be?
d) In this context, describe what is meant by the power of the test.
e) If the hypothesis is tested at the 5% level of significance instead of 1%, how will this affect the power of the test?
f) The lawsuit is based on the hiring of 37 employees. Is the power of the test higher than, lower than, or the same as it would be if it were based on 87 hires?
A population is normally distributed with the mean of 100 and a standard deviation of Would it be unusual for mean of sample of 3 to be 115 or more? Why or why not?
Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing 4 red marbles, 4 green ones, 2 white ones, and 3 purple ones, She grabs 5 of them. Find the probability of the following event expressing it as a fraction in lo..
how would you as a researcher and public health professional convince someone who is skeptical about research results
The χ 2 statistic from a contingency table with 6 rows and five columns will have:
A bonding company want to insure a construction projects completion. If the project is cancelled due to the contractor's lack of performance
Construct a 96% confidence interval for the population proportion when 285 people out of 750 were in favour of boycotting the World Cup matches if prices were to rise above $100 for 64 televised matches.
1 every time you go to a beach for vacation you take home a little sand to keep as a souvenir. over your lifetime you
question 1 a two-way anova model was used to analyze an experiment with two levels of one factor three levels of a
in the united states a full-time employee works an average of 40 hours a week with a standard deviation of 2.5 hours
Develop a 94% confidence interval estimate on the fare between the two airports for XYZ. Develop a 98% confidence interval estimate on the fare between the two airports for XYZ.
The amount of time spent per week in studying STA 392 is of interest. A random sample of 15 students are recorded: (in hours)
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
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