Contestants in a competition
Eleven women and nine men are the contestants in a competition. If three winners are randomly selected, what is the probability that they are all women? Round your answer to four decimal places
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The heights of five starting players on basketball team have a mean height of 6'4" and median height of 6'6", and range of 11 inches. If the tallest player is replaced by the substitute who is three inches shorter, which of the new values (mean, m
A fast food restaurant has one drive through window. An average of 40 customer per-hour arrive at window. It takes average of one minute to serve a customer. Suppose that inter-arrival as well as service times are exponential.
Sixty years later, the same question was asked of 1,100 adult Americans and 396 indicated that they were total abstainers. Has the proportion of adult Americans who totally abstain from alcohol changed? Use the a = 0.05 level of significance.
Supposing that both populations are normally distributed, test whether u1 not equal u2 at the a = 0.05 level of significance for the given sample data.
Develop an interval estimate of the difference between the proportions of the two populations, using a .05 level of significance, as the basis for your decision.
A 95% CI for the difference between two means is reported as (-0.1, 1.5). What can you conclude about the results of a significance test of the null hypothesis that the population means are equal versus the two-sided alternative?
Test at the 5% significance level the null hypothesis that population variance is at most 2.25
Discuss what is wrong with your friends procedure and why. Assume he reported t = 1.70 with a P-value of 0.06. Determine the correct P-value that he should report?
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