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The University Dean has asked you to perform this study on all students studying business within Australia. It is known that the population is normally distributed with a mean is 67 and a standard deviation of 21. To conduct this study, a random sample of 100 students is selected.
(a) Calculate the appropriate standard error required.
(b) Calculate the respective z-score you would use to determine the probability that the sample mean grade will be less than 75.
(c) Determine the probability that the sample mean grade will be less than 75. Please give me complete answer with all steps in detail.
we choose an integer from 1 to 200 including 1 and 200 at random. recall an integer is just a whole number such as 1 2
A real emergency situation is a rare event, with a probability 0.004. Given that the alarm has just sounded, what is the probability that a real emergency situation exists?
a local market research company has been hires to collect data about the salaries of recent college graduates. based on
Show that Q3 is an unbiased estimator for q and if Q1 and Q2 are independent, how should the constant a be chosen in order to minimize the variance of Q3?
which of the following is not a difference between a confidence interval and a prediction interval?select onea.
You are in charge of a new study on the effect of caffeine and memory. From , a previous pilot study , you find that the effect size is 0.6. You want to have a type I error at 0.05 and a type II error of 0.2 . In your study you split your sample i..
a regional director responsible for business development in the state of pennsylvania is concerned about the number of
There are two ways to run the experiment. The first is to obtain a random sample of 12 drivers, divide them into two groups at random and assign one group to the standard light and the second group to the new light. Suppose the table below represents..
question consider the ages of ceos of companies throughout the united states.event a ceo is under 40event b ceo is at
we have a sample of 36 cola cans that contain an average of 12.29 oz but this time lets assume that we dont know sigma
Caculate the expected value of the profit made by the insurance company. Many call this kind of situation a win win opportunity for the insurance company and the promoter. Do you agree? Explain.
in a management trainee program 80 percent of the trainees are female 20 percent male. ninety percent of the females
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