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1. For sample of M=85, a score of X=90 corresponds to z=0.50 determine the sample of standard deviation?
2. In the population of exam scores scores if x=88 corresponds to z=+2.00 and a score of x=79 and corresponds to z=-1.00 determine the mean and standard deviation for population. Draw distribution and locate two scores on the sketch.
3. Population of following N=5 scores: 0,6,4,3, and 12
a) Calculate μ and σ for the population
b) Determine the z-score for each score in the population
c) Transfer original population into new population of N=5 scores with a mean of μ =60 and a standard deviation of σ=8
Furthermore, you could also perform a regression on the data so you have a model with which you can predict other people's IQs based on their mother's IQ.
Tired of careless spelling and grammar, a company decides to administer a test to all job applicants. The test consists of 20 sentences. Applicants must state whether each sentence contains any grammar or spelling errors.
At the .01 significance level, is there a difference in the mean number of times men and Women order take-out dinners in a month? What is the p -value?
Suppose we select a sample of 40 tires and use a simulator to determine the tread life. What is the likelihood of finding that the sample mean is between 59,050 and 60,950?
The manager of the greeting card section of Mazey's department store is considering her order for a particular line of Christmas Cards. Develop the payoff table for this decision situations.
Airlines monitor the causes of flights arriving late. 75% of flights are late because of weather, 35% of flights are late because of ground operations. 10% of flights are late because of weather and ground operations.
Suppose that the incidence of MI is 0.005 per year among subjects who are actually take placebo and that aspirin prevents 20% of MIs
A study was conducted to determine whether magnets were effective in treating pain. The valves represent pain measurements.
A manager of a gasoline filling station is thinking about a promotion that she hopes will bring in more business to the full-service island. She is considering the option that when a customer requests a fill-up
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
How large a sample size will need to be selected if we wish to have a 99% confidence interval with a margin for error of .25 hours?
Say a fast-food franchiser is considering building a restaurant in a local mall. According to franchise headquarters, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour.
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