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Please review the following questions and provide a detailed answer for each one. They are from Introduction to statistics. Thanks!
1. Given a standard normal variable z, find the cutoff value separating the top 2.5% of the values from the rest of the distribution.
2 Heights of men are normally distributed with mean 69 inches and standard deviation 2.8 inches. Find the height of a doorway so that only 3% of men would not fit through the door.
Membership in Mensa requires an IQ score above 131.5. Nine candidates take IQ tests and their summary results indicate that their mean IQ score is 133 (1Q scores are normally distributed with a mean of 100 and a standard deviation of 15).
3. If one person is selected from the general population, find the probability of finding someone with an IQ score of at least 133.
4. If 9 people are randomly selected from the population, find the probability that their mean IQ score is at least 133.
Suppose that data is recorded for equal period of "before"-"after" time. Use 1% level for risk. Given processed data, explain what John must do.
a researcher collects data on two independent samples. the first group consists of 20 human subjects has a sample mean
Find the number of customers n such that the probability that the orders of all n customers can be processed in less than 2.5 hours is approximately .025. Please help with this question.
Assuming the residuals are normally? distributed, how would I determine s Subscript b 1 Baseline? If I'm assuming the residuals are normally? distributed
What is the sample proportion, proportion of contacts that resulted in a sale being made?- For simple random samples of this size, what is the probability that p ≤ 0.10?
In a random sample of 70 blood tests, what is the mean number that test positive for the HIV virus? (Round your answer to 1 decimal place)
The psychologist wants this difference to be within 5 msec of the difference between the sample means.
In a simulation program, three random two-digit numbers will be generated independently of one another. These numbers assume the values 00,01,02
Consider repair cost for Car A and Car B. The mean repair cost for each is $500 per year. Which statistics about repair cost may play into your decision to purchase one of these?
The botanists were interested in the correlation between weight change (y) and digestion efficiency (x). Plot the data for these two variables in a scatterplot. Do you observe a trend?
Can you tell me what are the advantages and limitations of applying nonparametric tests in solving business problems?
1. the amount of tea leaves in a can from a particular production line is normally distributed with u 110 grams and o
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