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To determine the proportion of people in your town who are smokers, it has been decided to poll people at one of the following local spots:
(a) the pool hall;
(b) the bowling alley;
(c) the shopping mall;
(d) the library.
Which of these potential polling places would most likely result in a reasonable approximation to the desired proportion? Why?
the addition of a new accelerator is claimed to decrease the drying time of latex paint by more than 4. several test
an iq test is designed so that the mean is 100 and the standard deviation is 10 for the population of normal adults.
Prepare a report for the customer that presents the expected value in points of each throw of the darts, and then present a graphic representation.
In a poll of 1049 adults, it was found that 21% smoked cigarettes in teh past week. Use a 0.05 significance level to test the claim that less than 25% of adults have smoked within the past week.
Place a 95% confidence interval about the population mean number of down hours per month.
Amount of housework done by men and women in dual-earner marriages. The study showed that 67.5% of the men felt that the division of housework was fair?
mens heights are normally distributed with a mean of 69.5 in. and standard deviation of 2.4 in. womens heights are
A distribution of exam scores has a mean of µ 5 78. If your score is X = 70, which standard deviation would give you a better grade: s =4 or s = 8?
a random sample of 35 gmat scores for applicants to an mba program has a mean score of 479. the researcher is
We want to determine if the proportion of people in the population who believes this is less than 0.75. What is the p-value?
a random sample of n 9 structural elements is tested for compressive strength. we know that the true mean compressive
A medical researcher found a significant relationship among a person's age x1, cholesterol level x2, sodium level of the blood x3, and systolic blood pressure y.
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