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1.) A metropolitan school system consists of two districts- north and south. the north district contains 60% of all students, and the south district contains 40% of all students. a minimum competency test was given to all students. 10% of the north district students failed, and 15% of the south district students failed.
What is the probability that a student who has failed the test came from the south district?
a.) 0.15b.) 0.40c.) 0.50d.) 0.75
They would like the margin of error of the 95% confidence interval for the proportion to be 0.05 or less. Use the guessed value p = 0.25 to find the required sample size.
Would a normal model be appropriate to describe the distribution of sale prices?
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What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
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The board of directors of Saner Automatic Door Company consists of 12 members, 3 of whom are women.
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You may assume the sample data comes from a population that follows a normal distribution. Using a .05 level of significance test the company's claim.
One approach would be to contact every psychology graduate student you know and ask them to fill out a questionnaire about it.
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