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A marketing research firm wishes to estimate the proportion of adults who are planning to buy a new car in the next 6 months. A simple random sample of 100 adults led to 22 who were planning to buy a new car in the next 6 months.
a. Compute the 95% confidence interval for the proportion of adults who are planning to buy a new a car in the next 6 months.
b. Interpret this confidence interval.
c. How large a sample size will need to be selected if we wish to have a 95% confidence interval that is accurate to within 1%.
What are the odds against drawing a card from an ordinary deck of cards and getting a spade?
Is there a significant difference in mean fetal heart rates by position? Run the test at a 5% level of significance.
which a correlation analysis or regression analysis could contribute to a better decision. The situation can be from a work, of general interest, or experienced in private life.
A survey of 10 different suburbs in Dallas Texas found the average gasoline to be $ 1.294 a gallon with a standard deviation of $ .0526. What is the critical value using a=.05 and what is the test value.
Affirmative action commitments by industrial organizations have led to an increase in the number of women in executive positions. Satellite Office Systems has vacancies for two executives that it will fill from among four women and six men.
Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.
Assume that a decision maker wants to estimate a population proportion with 90% confidence and a margin of error of ±0.03. The decision maker has obtained a pilot sample of 10.
A recent survey reported in Business Week dealt with the salaries of CEOs at large corporations and whether company shareholders made money or lost money.
When determining the sample size necessary for estimating the true population mean, which factor is not considered when sampling with replacement
What is the possibility that for a arbitrarily selected customer the service time could exceed 3 minutes?
Describe the effect of an outlier or extreme value on the confidence interval - Find the probability that the return for common stocks
Write a sample result section, discussing your data screening activity (this section should be in APA format).
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