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For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.
In a marketing survey, a random sample of 1018 supermarket shoppers revealed that 276 always stock up on an item when they find that item at a real bargain price.
(a) Let p represent the proportion of all supermarket shoppers who always stock up on an item when they find a real bargain. Find a point estimate for p. (Enter a number. Round your answer to four decimal places.)
(b) Find a 95% confidence interval for p. (For each answer, enter a number. Round your answers to three decimal places.)lower limit upper limit
c. What is the margin of error based on a 95% confidence interval? (Enter a number. Round your answer to three decimal places.)
Suppose a random sample of 5 families had the following income and savings:
The lifetime of a certain brand of light bulb is normally distributed, with a mean of 7500 hours and a standard deviation of 700 hours.
1) What is the probability of exactly 2 people in a group of 10 to have the same birthday?
What other information would you like to know to answer the question about salary equity between the genders? Why?
a) Create a probability model for this carnival game. b) Find the expected number of darts you'll throw.
At the 0.05 level of significance, is there evidence that the population mean reimbursement was less than $100? Discuss the underlying assumptions of the test used in (a).
If a technical breakthrough occurred that raised the profit per unit of X 1 to $3, would this affect the optimal solution?
-Six balls numbered 1 to 6 are placed in an urn. One ball is selected at random. Find the probability that it is NOT number 5.
What are some limitations in using multiples to compute a firm's enterprise value?
Use the Wilcoxon signed-rank test with a = 0.01 to determine whether there is any evidence that the median spray height is less than 630 feet.
What four steps should be used in evaluating expressions? Could these steps be skipped or rearranged? Explain your answersr.
Researchers are interested in the average number days of absences of students. 20 randomly selected students were surveyed, and the data is shown to the right.
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