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A shipment of 7 television sets contains 2 defective sets. A hotel makes a random purchase of; 3 of the sets. If x is the number of defective sets purchased by the hotel, find the probability distribution of X. Express the results graphically as a probability histogram.
A study of 20 families in a certain large city showed that the average income was $33,210 in 2000 with a standard deviation of $1800. Test the hypothesis that the true average income in this city was actually $31,000 against the hypothesis that it..
Four students riding to school together offer a the excuse of a flat tire on their car for missing a test. On the makeup test, the professor asks the students to each identify the tire that went flat.
Suppose that by the end of 2009, that percentage was 85%. If a sample of 10 U.S. adults is selected, what is the probability that:
What is the probability that all three students pick exactly the same card?
standard deviation = $23.86 million mortgage amount standard deviation = 2.58% interest rate. what is the equation that predicts mortgage amount from interest rate? compute the slope of the straight line.
james w. has a portfolio that includes 20 shares of disney and 30 shares of amazon. the price of disney stock is
Standard deviation of this poll is 4%. What would be standard deviation if sample size were increased from 83 to 190?
you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a one sample or two sample test?
If there is a significant difference between proportions of females and males who plan to vote for the incumbent president. what is the p value of the test.
How do research questions frame studies? What type of wording would lead to a qualitative study? A quantitative one?
Find the probability that the mean weight of those loads is less than 42.00 tons. Assume that the variable is normally distributed.
Compute a 90% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24, and 59. Change the number from 59 to 24
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