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1) The program office budgets $30,000 per program review at the contractor's site. Your concern for "end of year" spending drills is that you have budgeted enough for the reviews (i.e. you are only concerned if the actual costs are higher than the $30,000 target). A sample of 16 trips yielded a mean of $32,500 and a standard deviation of $3,500. Test the budgeted amount at the 80% level of confidence. Select the correct answer out of each pair of choices. (Carry intermediate calculations to three decimal places.)
you take a sample of 22 from a population of test scores and the mean of your sample is 60. a you know the standard
1. construct a confidence interval of the population proportion at the given level of confidence. x120 n300 99
What is an example of data that can be transformed from one level of measurement to another, and another example of data that cannot be transformed?
Alisha buys 8 tickets in a raffle. 100 tickets are sold altogether. What is the probability that Aisha does not win the first prize
Describe the steps for testing a hypothesis that people are more likely to keep watching a movie if they have already invested money to obtain the movie.
The linear correlation coefficient, r, measures the strength of the linear relationship the variables in a set of ordered pairs (x,y). What is the maximum and minimum values for r?
The following examples are experiments and their associated random variables. In each case identify the values the random variable can assume and state whether the random variable is discrete or continuous:
The gambler is paid later as follows, depending on the number of winners he picked. What is his expected gain? Remember, a loss is a negative gain, and that the bookie keeps the gambler's $20.
find the average and the sd for the list 11 15 9 7 3. using the average and sd you found convert the values in the list
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 3.7 lb of the population mean.
The value of "Z" chosen for constructing (calculating) the confidence interval estimate is determined by
What are the critical z-values for a two-tailed hypothesis test and in classical hypothesis testing, the test statistic.
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