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Using a significance level of 0.05 I want to conduct 3 hypothesis tests using the data below. I need to state my alternative and null hypotheses and test a claim about a proportion. I would like my claim to be that over 50% of movies made cost over 1 million dollars to make. If that is not a good claim to use in order to give me an example, please feel free to change the claim.
Test a claim about the mean with the population standard deviation unknown and again would like to use the traditional method unless it won't work for my data.
If HIV virus is actually present, the probability that ELIA test will give a positive result from ELISA is .01. If ELISA has given a positive result, use the Bayes' theorem to find the probability that the HIV virus is actually present.
The standard screening test for Down's syndrome is based on a combination of maternal age and the level of serum alpha fetoprotein. Using the test 80% of Down's syndrome cases can be identified while 5% of normals are detected as positives.
An EMT Service keeps records of emergency calls. A study of 150 five-minute time intervals resulted in the distribution of number of calls as follows.
Found mean number of sticks of gum chewed per day was 9. Standard deviation of population is 1. At α = .05, is number of sticks of gum person chews per day actually is greater than 8?
The length of a particular telemarketing phone call has an exponential distribution with a mean equal to 1.5 minutes. Find the probability that the length of a randomly selected call will be between 30 - 50 minutes and 1 minuter or longer.
Decide if the events A and B are mutually exclusive or not mutually exclusive. A card is drawn from standard deck of 52 playing cards.
Todd is less interested in testing a hypothesis than he is in developing an estimate for what people would be willing to pay. He would like 95% confidence intervals for the average price people would be willing to pay
Let's further suppose that there was good interrater reliability on these frequency counts of behaviours and that they are interval/ratio level of measure, normally distributed, and independent observations.
Bob gets tests grades of 86, 92, and 60 He gets an 90 on his final exam. Find the weighted mean if each tests counts for 20%, and the final exam counts for 40% of the final grade.
An average department store sells 350 men's suits per year. The men's suit departments at a particular national chain of stores claim they sell more than the industry average. In 35 of their stores, they sold, on the average, 430 suits per year wi..
Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative.
The distribution of sample mean for samples of 500 homes is normal with a mean of 2.64 and a standard deviation of 0.06. Suppose you select a random sample of n=500 homes and determine that the mean number of people per home for this sample id 2.5..
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