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According to the IOC, female participation in the 2000 Summer Olympic Games was 42%. A sports-merchandising expert randomly sampled pre-Olympic exhibitions over the past year, and found that 202 of 454 athletes were women. Is this strong evidence that the participation rate for women athletes has increased? Test the appropriate hypothesis and state your conclusion. Was your test an upper one-tail, a lower one-tail, or a two-tail? Explain why you chose this kind of test. State the meaning of your P-value in this context.
Suppose today's sample yielded a mean of $4.19 and a standard deviation of $0.10, create and interpret a 99% confidence interval for the population standard deviation. Assume the distribution of gas prices in the area follows a normal distribution..
A bank has the following data on the gender and marital status of 200 customers.What is the probability of finding a single female customer? Is marital status independent of gender? Explain using probabilities.
IQ scores but have been standardized so that complete sample has mean of M = 10 and standard deviation of s = 2. Compute mean and the standard deviation for the sample of n = 8 females and for sample of n = 8 males.
Consumer Review posts reviews and ratings of a variety of products on internet. The following is a sample of 20 speaker systems and their ratings (www.audioreviews.com).
consider random sample from a populaion x that is exponentialhy distributed with parameter y. fxyye-yx for xgt0a
Over a 20 year period, the average grade point average of applicants to our graduate program has been found to be 3.27. This year the mean grade point average of the 57 students applying to our graduate program is 3.53
State the null hypothesis H 0 and the alternative hypothesis H 1 that we would use for this test. Determining null and alternative hypotheses for the height of a plant.
hypothesis testing is one of the mainstays of medical research literature. you would be hard-pressed to find a research
A sample of 70 orders revealed that 57 were delivered in promised time. At .02 significance level, can we conclude that less than 87 percent of orders are delivered in less than 10 minutes?
A big part of regression analysis involves hypothesis testing. For example the t-score for b1 tests a hypothesis...what is the H0 and Ha for this hypothesis?
what is the probability of completing the exam in one hour or more? what is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
Using these data, construct a 99% confidence interval to estimate the average number of days and excavator is rented to a client, and assume the number of days per rental is normally distributed in the population.
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