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42% of the cars in a dealer lot are red, 21% are black and 10% are white. The remainder are some other unspecified color. Salespersons randomly shows three cars to three different customers. What is the probability the first car shown was red, the second was black and the third was red again to be clear, the first red car and the second red car may be the same car. This is called sampling with replacement.
Find a 95% confidence interval for the mean number of days it takes Rebco's customers (as a combined group) to pay their bills.
A researcher records the number of words recalled by students presented with a list of words for one minute. In one group, students were presented.
The variance of GPAs of all students at this university was .13 two years ago. Test at the 1% significance level whether the variance of current GPAs.
Consider the price of homes in a large metropolitan area. What kind of distribution would you expect in terms of skew ness and kurtosis?
a professor is doing a study of the relationship between students grades and their part-time work. he analyses data
Do the randomization. Use computer software to carry out the randomization for Example 2.13.
A researcher uses a sampling distribution made up of samples of size 223.
With a confidence of 95%, what is the margin of error for the proportion of all carp that would incorporate the gene into their DNA?
To illustrate the law of large numbers, use the normal approximation to the binomial distribution to determine the probabilities that the proportion of heads will be anywhere from 0.49 to 0.51 when a balanced coin is flipped
What is the probability that the graduate selected will be a male who is not a member of a sports team? What is the probability that the graduate will be either a female or a member of a sports team?
PEGCOR has a? P/E ratio of 16.8. Earnings per share are $ 1.91, and the expected EPS 5 years from today are $ 2.57. Calculate the PEG ratio.?
Perform the test at the 5% level of significance using the p-value approach. You need not repeat the first three steps, already done in part (a).
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