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In an effort to determine whether any correlation exists between the price of stocks of airlines, an analyst sampled six days of activity of the stock market. Using the following prices of Delta stock and Southwest stock, compute the coefficient of correlation. Stock prices have been rounded off to the nearest tenth for ease of computation.
Delta: 47.6, 46.9, 50.6, 52.6, 52.4, 53.1
Southwest: 15.1, 15.4, 16.2, 15.6, 16.4, 17.7
find the value of the test statistic z in the given situation. the claim is that less that 12 of all adults in the us
a recent article reported that there are approximately 11 minutes of actual playing time in a typical national football
Create a 95% confidence interval for true mean.
if 30 claims are selected, find the probability that 15 will contain 0 errors, 8 will contain 1 error, 5 will contain two errors and 2 will contain 3 errors.
Is there evidence to suggest a difference in the mean waiting times at the four body shops? Use the .05 significance level.
1.a large study was done to compare two treatments for recurring ear infections in young children. a total of 150
question a multiple-choice test has 6 questions. there are 4 choices for each question. a student who has not
a pollster collects the following data for 350 college
At the .05 significance level, can we conclude that the guideline is still reasonable?
About 5.5 percentage points in either direction from what would have been obtained by seeking out all Ohio State University female students." Do your results agree with this statement?
A random sample of 51 observations was selected from a normally distributed population. The sample mean was = 88.6, and the sample variance was s2 = 38.2.
60 patients are in each group. the sample mean icu stay days and sample standard deviation for the treatment an control
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