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The sample mean to be calculated from a random sample of size n = 4 from a population consists of the eight measurements (2, 6, 9, 12, 25, 29, 39, 50). Find the sampling distribution of y-. (Hint: There are 70 samples of size 4 when sampling from a population of eight measurements.)
a. Does the sampling distribution appear to be approximately normal?
b. Verify that the mean of the sampling distribution of y- equals the mean of the eight population values.
Your high school graduating class had 564 members. Thirty-three percent of these are expected to attend college. The probability that less than 160 will attend college is
a regional director responsible for business development in the state of pennsylvania is concerned about the number of
For a hypothesis comparing two population means, what is the critical value for a one-tailed hypothesis test, using a 5% level of significance level, with both sample sizes equal to 13? Assume the population standard deviations are equal.
What would be the correct null and alternative hypothesis for the following situation: The sample has a mean of 72.3 mph and a standard deviation of 7.4 mph. Use a 0.05 significance level to test the claim that the mean speed of all cars is greate..
a newspaper article reported that a poll based on a sample of 1150 residents of a state showed that the states
The concessions manager at the Clemson vs. USC football game must decide whether to have the vendors sell sun visors or umbrellas. There is a 30% chance of rain
Create an operational definition of your construct using at least three peer-reviewed journal articles as references. Select and list five items used to sample the domain.
American Bank randomly assigns six-digit PIN codes to their debit cards. What is the probability that the thief guesses your pin on the first try by simply randomly guessing?
A) What is expected time to pain relief for a male following treatment? B) What is the expected time to pain relief for a participant aged 50 following treatment
how large a sample should be taken if the population mean is to be estimated with 90 confidence to within 79? the
A statistics professor plans classes so carefully that the lenghts of her classes are uniformly distributed between 50.0 and 52.0 minutes. find the probability that a given class period runs less than 50.75 minutes.
From an inventory of 48 cars being shipped to local automobile makers, 12 have defective radios installed. What is the probability that one particular dealership receiving 8 cars will find 2 radios being defective? Make assumptions if necessary.
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