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Question: Give an example of a study-real or hypothetical-in the social sciences that might display its data using the following types of graphs. State your independent variable(s) and dependent variable, including levels for any nominal variables.
a. Frequency polygon
b. Line graph (line of best fit)
c. Bar graph (one independent variable)
d. Scatterplot
e. Time series plot
f. Pie chart
g. Bar graph (two independent variables)
A random sample of n = 4 scores is selected from a population with µ = 80 and σ = 20. On average, how much difference would you expect between the sample mean and the population mean?
The investigator would like to make estimates for each class as well as the total body of undergraduates. Choose a method of sampling and give the reasons.
Consider a financial services salesperson whose annual salary consists of both a fixed portion of $25,000 and a variable portion that is a commission.
Suppose the time it takes a customer to get and pay for seats at the ticket window of a baseball park is a random variable with a mean of 100 seconds.
for a population of exam scores a score of x29 corresponds to z0.5 and a score of x20 corresponds to z-1.0. find the
Complete the ANOVA table.- Is there any evidence of interaction? Use a = 0.01.- Is there any evidence that gender or job type affects the length of employment? Use a = 0.01.
Is this experiment collectively exhaustive? Explain.
Plot the data. Does the trend in lean over time appear to be linear?- What is the equation of the least-squares line? What percent of the variation in lean is explained by this line?
What is a multiple baseline design? Why is it used? Distinguish between multiple baseline designs across subjects, across behaviors, and across situations.
She decided to investigate and gather the following sample information. Would it be reasonable for her to conclude that union nurses earn more? Use the .02 significance level. What is the p value?
A palette has 200 milk cartons. Of the 200 cartons, it is known that ten of them have leaked and cannot be sold.
The cost of a board failure and interruption includes the fixed cost c0 of a new board and a cost that increases proportionally to Y2. If C is the cost incurred, C = c0 + c1Y 2. Find the probability that the delivery time exceeds two days.
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