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A sample of n = 300 items has been randomly selected. Of these, 55 contain the attribute of interest. based on this information, compute a 90% confidence interval estimate for the proportion of items in the population that have this attribute.
Assume that a decision maker wants to estimate a population proportion with 90% confidence and a margin of error of ±0.03. The decision maker has obtained a pilot sample of 10. This pilot sample's proportion is 0.50. What sample size will be sure to achieve the desired results? How many additional observations must the decision maker obtain?
Use this information to construct a probability table, and then calculate each of the following probabilities: P(foreign car)
What is 95% confidence interval estimate for average number of years served by all Supreme Court justices?
The width of a confidence interval will be:
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Find the mean ______________ and the standard deviation _____________
How do we decide if the homogeneity of variance assumption is significantly violated?
Compare value of test statistics F obtained in part(2) with value of t 2 , square of test statistic for testing H 0 : β 1 =0 that was needed in test null hypothesis that true slope is 0. Interpret the results of this test.
Perform the indicated test of hypothesis. HO: M 7, given x= 0.01, N=25, Xbar = 7.019 and SD is =.1681. Assume the sample is selected from a normally distributed population.
the probability that a household is both prosperous and educated is P (A and B) = 0.082. What is the probability P (A or B) that the household selected is either prosperous or educated.
They have collected data on gender, shoe size, and height to see if they can change their business model to include only one size of shoes regardless height or gender of the wearer.
Number of miles flown in a One- year period by the sample of "frequent flyers" was recorded. Is this a grouped or an ungrouped frequency distribution?
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
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