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(a) Calculate the sample correlation coefficient by hand.(b) By use of a spreadsheet calculate the sample correlation coefficient.(c) Using a spreadsheet produce a graph of the results(d) What do you deduce from the above and what actions do you suggest?
What can you conclude from Chebyshev's theorem about the percentage of adults in the town whose heights are between 57.3 and 77.7 inches? Please show work.
Between 180 and 230 (inclusive) of the drivers in the sample regularly wear a seatbelt? Hint: Use the BINOMDIST function in Excel.
Construct a probability for the number of students in the sample who watch soap operas.
She wants to choose the passing grade such that the probability of passing a student who guesses on every question is less than 1/10. What score should she set as the lowest passing grade?
A research team conducted a study of soft-drink preferences among residents in a test market prior to an advertising campaign for a new cola product.
At 1 excavation site 8641 pot shards have been found that have not presently been cleaned also identified. Define the probability.
Marconi Shipping Company packages their shipments in 50 ton containers. History has shown that the shipping department reports that the distribution of container weights follows the normal distribution
On a graph, the vertical difference between the observed and predicted values of the response variable for an individual is called the
Explain the distribution of mean of samples of size 15.
Then test to see whether it considerably varies from 0 [use alpha = 5%]. Don't forget to identify the null and alternative hypotheses.
Ccarry out a Z test using the five steps hypothesis testing with a two-tailed test at the .05 significance level, and make a drawing of the distributions involved.
An educational study uses a simple pre-post design to assess the efficacy of a computer tutor for solving inequalities. Twelve pilot students participate. Each student is given a pre-test, then participates in six sessions using the tutor, then i..
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