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University officials at a major university would like to use three -term moving averages to examine enrollment. Enrollment data (in thousands of students) for the 12 most recent terms are shown in middle column of the table below.
In the far-right column of the table are the 3-term moving averages for the data. Fill in both blanks in this column. Round your responses to at least two decimal places.
Term Enrollment
in thousands 3 term moving average
1 21.1 n/a
2 22.7 22.27
3 22.0 23.00
4 24.3 24.23
5 26.4 25.57
6 26.0 26.87
7 28.2 27.97
8 29.7
9 28.2
10 30.3 29.83
11 31.0 31.00
12 31.7 n/a
The impact of campaign film on attitudes toward a political candidate was investigated. Prior to showing the film, the attitudes of 15 people toward the candidate were assessed using a political likability scale.
How many observations were in the original data set? In the bottom row of the stem and leaf display identify the stem the leaves and the numbers in the original data set represented by this stem and its leaves.
One of the most important uses of a correlation is its potential use in_________
Describe why the normal distribution can be used as an approximation to binomial distribution. What conditions should be met to use the normal distribution to approximate the binomial distribution? Why is a correction for continuity essential.
Write the hypothesis statement. What distribution are you using?
The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College.
At a = 0.05, can you reject claim that at least 52% of adults are more probable to purchase a product when there are free samples?
Evaluate your histograms for any outliers in your data. Based on your evaluation of outliers, you may trim no more than 1% of the data contained in the data set. This must be done symmetrically (i.e., trimming no more than 0.5% off the top and 0.5..
Do the data indicate a significant difference between the frequency distributions for male and females? Test at the .05 level of significance and describe the difference.
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
Stock A has an expected return of 12% and a standard deviation of 40%. Stock B has an expected return of 18% and a standard deviation of 60%. The correlation coefficient between Stocks A and B is 0.2.
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