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1. Attitudes Toward Marriage In a Time>CNN survey, 24% of 205 single women said that they "definitely want to get married." In the same survey, 27% of 260 single men gave that same response. Construct a 99% confidence interval estimate of the differ- ence between the proportions of single women and single men who definitely want to get married. Is there a gender gap on this issue?
2. Attitudes Toward Marriage Refer to the same sample data in Exercise 21 and use a 0.01 significance level to test the claim that there is a difference between the propor- tion of men and the proportion of women who definitely want to get married. Does there appear to be a difference?
Define the decision rule. Calculate the value of the test statistic.
The diameters of ball bearings are distributed normally. The mean diameter is 74 millimeters and the variance is 16. Find the probability that the diameter of a selected bearing is less than 78 millimeters.
The camera store in question wants to increase sales and is exploring three options: 1. Invest and expand the current store. 2. Open a second store in another part of the city. 3. Open an online outlet.
a random sample of 100 preschool children revealed that only 60 had been vaccinated. provide an approximate two-sided
an electrical engineer is reporting one the results for a process that manufactures high-voltage supplies with a
What is the probability of picking two women in a sample of 5 drawn at random and without replacement from a group of 9 people, 4 of whom are women?
d. Specify the null and alternative hypotheses you would use to test whether the data provide sufficient evidence to indicate that x contributes information for the (linear) prediction of y.
a 95 confidence interval for a population mean u is given as 18.958 21.015. this confidence interval is based on a
suppose we watch the price of the dow jones industrial index for three days.assume there is a 6040 chance that the
one of dotcoms products has a width dimensional specification of 1.488 plusmn .005 inches. the process is in
A radio amateur wishes to transmit a message. The frequency on which she sends the Morse signals is subject to random disturbances according to a Poisson process with intensity λ per second.
A mean time of 90 minutes and standard deviation of 18 minutes. What proportion of new typists need between 1 and 2 hours to learn the computer system?
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