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In a Time/CNN survey, 24% of 505 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 difference between the proportion of men and the proportion of women who definitely want to get married. Does there appear to be a difference?
(a) Interpret the slope of the fitted regression Sales = 842 - 37.5 Price. (b) If Price = 20, what is the prediction for Sales? (c) Would the intercept be meaningful if this regression represents DVD sales at Blockbuster?
A researcher administers a treatment to a sample of participants selected from a population with µ = 80. If the researcher obtains a sample mean of M = 88, which combination of factors is most likely to result in rejecting the null hypothesis?
If a correlation coefficient was calculated for n = 15, alpha = 0.01, and r = 0.85, what is the test value found using the t-test?
A discrete random variable Y takes the value -1, 0 and 1 with probabilities 1/2θ, 1- θ and 1/2θ respectively. Let Y1 and Y2 be two independent random variables, each with the same distribution as Y.
construct a grouped frequency distribution for the data given below184 174 180 172 184 175 180 178 183 180173 180 182
Test at .01 level of significance if mean number of number of calories for Brand A 16 oz. yogurt cups is greater than mean calories for Brand B 16 oz. yogurt cups.
A standard deviation of $5000. What is the probability that a randomly selected employee will have a starting salary of at least $31ooo?
Find out the mean, median and mode for the given data
In the following observational studies, describe changes that could be made to the data collection process that would result in an experiment rather than an observation study. Also, offer suggestions about unseen biases or lurking variables that m..
question the number of clients that go every hour to a bank agency is processed according the poisson distribution. we
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
A random sample of doctors was taken suppose the test statistic is z= -1.95. can we conclude that h0 should be rejected at the 1) a=.10 b) a=0.05 c) a= 0.01 level?
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