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Prior to a set of compensation policy changes at a company 29% of the employees surveyed said that they liked their job very much, 46% said that they liked their job moderately, and the remaining employees said that they were dissatisfied with their job. Now, in a survey of 207 employees, 62 said they liked their job very much, 104 said that they liked their job moderately, and the remaining employees said that they were dissatisfied with their job. When testing (at the 5% level of significance) whether the proportions have changed, what is the test statistic? (please round your answer to 3 decimal places)
using data collected from the fbi the number of registered automatic weapons and the murder rate were obtained for
Blood tests showed a sample mean of 8.1 pH with sample standard deviation s = 0.6 pH. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH of the blood.
Construct frequency distribution and calculate mean, range and standard deviation - Construct control charts for variables, rejects per unit and percentage defectives per batch
A pensioner receives 2 (thousand dollars) at the beginning of each month. The amount of money he needs to spend during a month is independent of the amount he has and is equal to i with probability Pi , i = 1, 2, 3, 4, i=1 Pi = 1.
M°ans waits for the bus. The waiting time, T , until a bus comes is U (0, a)- distributed. While he waits he tries to get a ride from cars that pass by according to a Poisson process with intensity λ. The probability of a passing car ..
1.there are two statistics classes. the first has 250 students and the second has 200 students. in the first class the
Calculate the mean, median, and standard deviation for ounces in the bottles and construct a 95% Confidence Interval for the ounces in the bottles.
tim cooper plans to invest money in a mutual fund that is tied to one of the major market indices either the sampp 500
Find, as Cardano did, the expected total without finding its distribution - Large prizes were given for large totals with a modest fee to play the game. Explain why this could be done.
A recent research report shows that the percentage of college students who have been reported for plagiarizing has reached 30% each in the colleges of Education, Arts and Sciences, and Business, but only 10% in the School of Law.
Suppose the people living in a city have a mean score of 48 and a standard deviation score of 7 on a measure of concerns about the environment.
it is important that face masks used by firefighters be able to withstand high temperatures because firefighters
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