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1. Suppose you are testing H0: N(55, 64) vs. H1 N(45, 49), with α = .05. Your test will be one draw x from one of these two populations. What is your critical boundary for x (not the one for the z score of x)? For what values of x would you reject H0? if You standardize H0 to N(0, 1). What is H1? What is β? What is the probability of a Type I error? 2.Suppose you are testing H0: N(3, 2) vs. H1 N(2, 2) where, α = .05, x = 2.2, and n = 14 (variance known). What is the value of the appropriate test statistic? Also, use the table to estimate the p-value to the closest value available.
Make a plot of the ratio of the number of boys born per year to the number of girls in the U.S. What do you see? In what year did we see the most total number of births in the U.S.?
A personnel manager for a large corporation feels that there may be a relationship between absenteeism and age and would like to use the age of a worker to develop a model to predict the number of days absent during a calendar year.
Suppose a coin is flipped and a die is rolled. Let E1 denote the event "the coin shows a tail", let E2 denote the event "the dies shows a 3", and let E3 denote the event "the coin shows heads and the die shows an odd number".
The null hypothesis is to be tested at 95% confidence. Determine the critical values for this test.
A statistics instructor collected data on the time it takes the students to complete a test. The test taking time is uniformly distributed within a range of 35 minutes to 55 minutes.
A random sample of 200 students at UCLA shows that 120 of them have internet access. Test the claim that the true population proportion of students at UCLA who have internet access
Of the adults in Jefferson County, 10% have had CPR training
Which of the following models are appropriate to forecast a time series whose amplitude increases over time?
The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample men and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error??
Two popular over-the-counter antacids are compared to determine which brand is preferred. Three hundred subjects are randomly selected then divided into two groups of 150 each, and given one of the two antacids.
The true population regression function, it isn"t. Before leaving this section we should ask and answer the following question. What"s so special about polynomials?
Select a second sampling technique for the same hypothesis and give a second detailed design of how you would gather sampling data.
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