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Use the following data to answer Questions.
Total no. of problems correct (out of a possible 20)
Attitude toward test taking (out of a possible 100)
17
94
13
73
12
59
15
80
16
93
14
85
66
79
18
77
19
91
a. Compute the Pearson product-moment correlation coefficient by hand and show all your work.
b. Construct a scatterplot for these 10 values by hand. Based on the scatterplot, would you predict the correlation to be direct or indirect? Why?
At a board meeting of 20 businessmen, all of whom wear ties, what is the probability that:
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
What do these different scores tell you about the tests in Weeks 1, 2, 3, and 4? What is happening to the students' scores over time?
Explain the relationship between total gross and opening gross total gross and number of theatres total gross and week in top 60.
Final step to be performed when testing hypothesis of population mean is to?
Let X = duration of Old Faithful geyser (in seconds), and let Y = time (in minutes) until next eruption Is there a relationship between X and Y ? What is P (a
Use this sample information to develop a 99% confidence interval for the population proportion of women who wear flats to work.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
If we assume that the lifetime of this type of bulb has a standard deviation of 400 hours, can we conclude at the 5% significance level that the claim is true.
What is the estimated index of satisfaction for a person who first married at 18, has an annual income of $26,500, has three children living, has assets of $156,000.
If the manager decides to spend $3000 on advertising, based on the simple linear regression results given above, what would the estimated sales be?
The correlation between his test and the BDI was r =.14. Evaluate this correlation. What does this correlation tell us about the relationship between these two instruments?
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