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A group of investors wants to develop a chain of fast-food restaurants. In determining potential costs for each facility, they must consider, among other expenses, the average monthly electric bill. They decide to sample some fast-food restaurants currently operating to estimate the monthly cost of electricity. They want to be 90% confident of their results and want the error of the interval estimate to be no more than $100. They estimate that such bills range from $600 to $2,500. How large a sample should they take?
Determine the probability that: a) Exactly 3 will have this mild side effect.
Suppose that a researcher does a study to see how level of anxiety (A 1 = low, A 2 = medium, A 3 = high) is used to predict exam performance (Y).
What quantitative method can be applied to help the Department make the decision? Outline how this method can be applied and explain how a qualitative method can also be applied to help the Department make the decision
Testing for Population mean - determine if there has been a significant change in the population mean.
Determine critical value for boundary of the rejection region (i.e., Zα).
What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?
Based on past data, the Student Recreation Center knew that the proportion of students who prefer exercising outside over exercising in a gym was 0.734. To update their records, the SRC conducted a survey. Out of 95 students surveyed, 76 indicated..
What proportion of the variability in steel shipments for motor vehicles is described by regression equation?
A prison official wants to estimate the proportion of cases of recidivism. In examining 250 convicts there are 65 cases. with 99% confidence interval what is the range? How do you figure this type of problem?
Findout the percentage of trainees earns less than $900 a month utilizing normal distribution.What percentage of trainees earns less than $900 a month?
A test of hypothesis is conducted at the .05 level of significance to test either or not the population correlation is zero.
What is the probability that the next 100 customers will spend an average of less than $56 on dinner?
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