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Use this sample information to develop a 99% confidence interval for the population proportion of women who wear flats to work.
Assume that the mean useful life of a particular lightbulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Determine the percentage of lightbulbs that will last 2,
Describe how you would carry out the study, including the variable or variables you would collect, how you would measure those variables, and what would indicate success.
Which sampling method from the choices listed above would be best? Describe how you would carry out your chosen sampling method of a student from part (a)
Which brand of chocolate chip cookies gives you the most chips per cookie? Explain why it would be hard to take a Simple Random Sample?
Develop a regression model that could be used to predict the number of victories based on the batting average. Which of the two models is better for predicting the number of victories?
The poll that is referenced shows 53% of those asked supported making smoking illegal. In the fine print at the bottom of the screen, you see that the margin of error is +/- 3%. What is your reactio
Conduct a test of hypothesis to determine whether the mean number of miles traveled is equal to 840. Use the .01 significance level. Find the p-value and explain what it means.
A clinical trial is conducted comparing a new pain reliever for arthritis to a placebo. Based on comparing the computed z to the rejection level z which of the following is (are) true?
One aspect of the beauty of scenic landscape is its variability. The elevations (feet above sea level) of 12 randomly selected towns in the Finger Lakes Regions. Find the mean.
15 both worked a part time job and made the Dean's list. What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.
Can you envision circumstances under which these outcomes would not be normally distributed? Provide three distinct examples of the business outcomes that are not normally distributed.
Given the large difference between the two measures of central tendency, which of the two would you rely on in describing the average claim cost and why?
Find the equation of the least-squares regression line. Give an estimate for σ, the standard deviation of the observations about the true regression line?
If you randomly assign participants to groups, can you assume the groups are equivalent at the beginning of the study? At the end? Why or why not?
A charity raffle prize is $1,000. The charity sells 4,000 raffle tickets. One winner will be selected at random. At what ticket price would a ticket buyer expect to break even?
The probability that a ticket holder will miss a flight is .005. If 180 passengers take the flight, what is the probability that at least 2 will miss the flight?
The sample mean of the accounts is found to be y-bar = $94.22, and the sample variance is equal to $455.21. Estimate mu and place a bound on the error of estimation.
The mean net weight of the carton is 11.8kg and standard deviation of 0.15kg. Does the sample mean differ significantly from the intended weight of 12kgs?
State and explain whether a survey based on these items represents a reasonable assessment of changes in the cost of food over the three years.
Compute the indices of real gross income (1998 = 100). Compute the indices of real gross income using the Retail Price Index as indicator.
The data given below represent the annual gross revenue (N'millions) obtained by a telephone company. Fit a least-squares trend line to the data and plot the line on your graph
A haulage contractor has two loads to deliver to separate customers. He has 4 trailers of which 2 are new. In how many ways can the trailers be allocated the deliveries?
A and B are two intersecting sets. Find the values of ab and a if: n(A) = 28; a + b = 36; x = 48. The number of elements in the universal set is 96.
A firm has tendered for two independent contracts. It estimates that it has probability 0.4 of obtaining contract A, and probability 0.1 of obtaining contract B. Find the probability that the firm.