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Students scores on a test in a public administration course follow a normal distribution with a mean of 160 points and a standard deviation of 12. One student who scored 161 on the test and received the grade of B is considering protesting his grade. He feels that the professor did not like him and awarded him a lower grade than his score deserved. The professor disagrees: she maintains that the top 10 percent of scores were given an A, the next 10 percent a B and so on and that tbere was no discrimination. Based on the professor-s grading criteria, does the student have grounds for protest? Explain your answer.
Prostate cancer are actually proven correct through subsequent biopsy. JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size?
Find a newspaper article or Internet report about a study that involves two quantitative variables.
a student randomly guesses at 20 multiple choice questions. each question has four possible answers with only one being
A table showing the season in which the first 36 U.S. presidents died. Research question: At alpha=0.10, Can you reject the hypothesis that presidents' deaths are uniformly distributed by season?
We shall attempt to answer these questions: (a) What is the average number of machines not in use? (b) What proportion of time is each machine in use?
Calculate measurements of central tendency and dispersal and Determine confidence intervals for data - Describe the vocabulary and principles of hypothesis testing and discuss application of course content to professional contexts.
Other group (drawing 6 slips without replacement from among 45). What is the probability that at least one of the shifts will be unrepresented in that sample of workers?
What is the probability the company will win at least one contract and What is the probability that no fruit trees and 2 of each of the others will be selected? 23)
Interview about attitudes toward alcohol. You have given every student at the party the same chance to be interviewed: what is the chance? Why is your sample not an SRS?
You are playing a game of chance in which four cards are drawn from a standard deck of 52 cards. You guess the suit of each card before it is drawn.
in the movie casablanca rick played by humpy bogart helped a married couple by allowing the husband to win at the
In a sample of 100 syringes, the hospital's quality control officer finds the average dosage to be 0.5mL. The standard deviation of the dosage is 0.02 mL and the distribution of the dosages resembles a normal distribution reasonably closely.
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