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Two random samples are taken, with each group asked if they support a particular candidate. A summary of the sample sizes and proportions of each group answering yes'' are given below:
Pop. 1:n1=82, p^=0.809
Pop. 2:,n2=89 p^2=0.61
Suppose that the data yields (0.0804, 0.3176) for a confidence interval for the difference p1?p2 of the population proportions. What is the confidence level? (Give your answer in terms of percentages.)
Confidence Level?
Change the frequencies to percentages - is there a group more likely to get high salaries.
An immediate adjustment will be made on any tire that does not last 50,000 miles." You purchased four of these tires. What is the probability that all four tires will last more than 50,000 miles?
A random sample of size 10 is selected from the N (20, 5) distribution. What is the probability that the variance of this sample exceeds 10?
What are the underlying assumptions of Spearman rank-order scale?
Of the 880 respondents, 171 admitted that at least one light had been red. Follow the four-step process to construct a 95% confidence interval.
Administrators at a university are planning to offer a summer seminar. It costs $3000 to reserve a room, hire an instructor, and bring in the equipment. Assume it costs $25 per student for the administrators to provide the course materials.
1.a recent study investigated the extent to which hypertension is affected by alcohol consumption. among other things
A subject is just guessing has probability .25 of guessing correctly on each card. What is the probability of exactly 5 correct guesses?
Determine payback period for implementing Oracle Discoverer? Assume that WebFocus will be in-place until December 31 and the migration to Oracle will be done concurrently and is expected to be completed and operational by Dec 31 as well.
confidence interval for the population mean.a sample of 49 items in a grocery store has an average fat content of 18.6
a sample of 97 observations indicated that x1 is 87. a second sample of 153 observations indicated that x2 is 117.
Computing the mean, standard deviation values for the given data - Describe how statistics is being misused in this situation
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