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The following data represent the responses (Y for yes and N for no) from a sample of 40 college students to the question "Do you currently own shares in any stocks?"
26 said No
14 said Yes
A) Determine the sample proportion, p, of college students who own shares of stock.
B) If the population proportion is 0.30, determine the standard error of the proportion.
The mean amount of life insurance per household in the United States is $110,000. What is the likelihood of selecting a sample with a mean of at least $112,000?
Estimate the population means growth in 1 year for 14-year-old boys. Make a point estimate and an 80% confidence interval estimate.
Why efficiency in markets with incomplete information present lower than in those with perfect information.
Show that {Xt} is a white noise sequence.This provides an example of a dependent white noise sequence. Prove that Xt and Xt+1 are not dependent.
Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from "The Collection from the Best of Classical Music."
Developing the histogram and pie chart for the sample data.
Perform Repeated Measures ANOVA also calculate PRE. An educational study uses a simple pre-post design to assess the value of a computer tutor for solving inequalities.
in 2002 investigators started a study of the association of cholesterol levels and stroke in a group of 2000 healthy
Assume the wages are normally distributed with a standard deviation of $0.45. If a worker at this car wash is selected at random, what is the probability that the worker earns more than $6.75?
1 assume you are presented with the following mutually exclusive investments whose expected net cash flows are as
A recent study indicated that 29% of the 100 women over age 55 in the study were widows. If no estimate of the sample proportion is available how large should the sample be?
How large a sample is required to estimate the actual proportion within a range of plus and minus 0.04? Use the 98 percent level of confidence. How is the z value found on the table?
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