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A survey in 2007 of 447 parents nationwide by the nonprofit organization College Saving Foundation found that 27% had saved nothing for their children's future college expenses. Based on the data, a 95% confidence interval is (0.23, 0.31). How should we interpret this interval?
a. The probability is 0.95 that the sample proportion falls in this interval.
b. The probability is 0.95 that the population proportion falls in this interval.
c. We are 95% confident that the sample proportion falls in this interval.
d. We are 95% confident that the population proportion falls in this interval.
The mean fare charged for service from the beach to the airport is $18.00 and the standard deviation is $3.50. We select a sample of 15 fares. What must you assume to make the above calculation?
To test the hypothesis that two population variances are equal, a random sample of size 13 was selected from the first population, and a random sample of size 21 was selected from the second population. What are the degrees of freedom to test the ..
Can you tell me why is a data analysis plan important for good business research? What are descriptions of some of a plan's major components and what data analysis tools can be included.
Create a mock SPSS data set. Create a data file in SPSS and enter the data presented in the table located in section 3.5 of chapter 3 in your textbook. Save this SPSS data file
a bag contains 10 red marbles 5 yellow marbles and 7 green marbles. if one marble is randomly picked from the bag what
You decide to develop a regression model using order value, number of products, and location of the retailer as predictors. Find the model equation. Is it significant at α =0.05?
Find the expected value or average profit per customer and determine how much profit they should expect if 10 people purchase one of their European vacation packages.
The sample has a mean of 598.8 ml and a standard deviation of 3.0 ml. What is the value of the test statistic for testing the appropriate test of significance?
Concern 2-card hands from a standard 52-card deck. A standard deck has 13 cards from each of 4 suits (clubs, diamonds, hearts, spades).
In a simple random sample of 821 citizens, 63% said that they approve the tax raise for improving the infra-structure of the nation.
Suppose that a television network wants to know how daytime television viewers feel about a new soap opera the network is broadcasting.
q1. given the following data compute the mad for the forecast. nbspnbspnbspnbspnbspnbspnbspnbsp
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