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How would you interpret the findings of a correlation study that reported a linear correlation coefficient of +0.3?
a. strong linear correlation
b.weak linear correlation
c. impossible, calculation error
d. no linear correlation
A large industrial firm uses 3 local motels to provide overnight accommodations for its clients. From past experience it is known that 20% of the clients are assigned rooms at the Ramada Inn, 50% at the Sheraton, and 30% at the Holiday Inn.
Calculate the coefficient of determination, given that the linear correlation coefficient, r, is -0.625. What does this tell you about the explained variation and the unexplained variation of the data about the regression line?
He would like to estimate with .05 of the true proportion with a confidence level of 90%. What is the sample size needed?
Hypothesis test for the difference between two means - Assume the population standard deviations are not the same. At the 0.05 significance level, is there a difference in the mean waiting time?
If, on the average, 20 orders are received by fax every two hours throughout the day, find the a. probability that a faxed order will arrive within the next 9 minutes.
Estimate the probability that the machine will overflow an 8 oz cup.
Sampling area consisted of an area of 120m x 50m within site two and was bordered by a road on one side and a stream on another.
Can you provide an example using your own data set (two related and unrelated variables) of at least twenty numbers each and apply the formula of correlation. Determine the correlation of each of the two sets of data.
What probability distribution does n1 alone have? Specify the values of the sample size index and parameter for that distribution.
40 were in favor of the Independent candidate, and 140 were undecided. At a 1% level of significance, test to see if the proportion of voters has changed. Calculate the value of the Chi-Square Test Statistic for this problem. What is it?
The various measures of central tendency: compare them (how they are similar) and contrast them (how they are different), including specific references to numbers, pictures, and tables derived from the data set.
Prepare a frequency distribution from data given below that describes how long it took a person to drive to work in work week.
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