Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A sample survey of users of public libraries. Test at 5 percent level to see if there is any evidence that women show greater preference for fiction than men.
The average purchase by those responding to the coupon offer would be at least N20. Can this claim be rejected at a 1 percent level of significance?
Standard deviation of N15,000 and a coefficient of skewness of 0.92. Explain what these terms mean in describing the distribution of the sales reps' salaries.
The construction costs (N'000s) and selling prices (N'000s) of new houses in the Coal City were as follows in 1988: Find the modal selling price of houses at Coal City in 1988.
The income distribution of a sample of 50 MTN subscribers in the Lagos area is as follows: Compute the arithmetic mean of the subscribers' incomes. Compute the modal and median incomes.
What suggestions could you make for investigating vehicle use, and tightening managerial control over the company?
Describe the outcomes of this experiment. List the elements of the sample space. What is the probability of obtaining a total of 5 for the two cards?
Assuming that his claim is right, find the probability that at most 4 out of 6 workers randomly chosen will be wearing their helmets while having lunch at the workplace.
Provide reasoning--think about the shape of the histogram for the data and how the shape would affect the relationship between the mean and the median for each situation.
Conduct a test to determine whether the two classifications r and c are independent, using the data in the following contingency table. Use α = .10.
Use the regression equation to determine the predicted values of y. Use the predicted and actual values of y to calculate the residuals.
What is the mean number of defective hard drives that the small business receives if all their shipments come in sets of five that contain the same proportion of defective hard drives?
A consumer's risk of 0.10 for a rejectable quality level of 5% nonconforming. Use Minitab oe excel to determine the appropriate plan.
The bank wishes to inform prospective customers that '99 times out 100 we can process your application in q working days'. Assuming that the normal distribution is still an adequate model, calculate
Calculate, using Minitab or excel, the probability that two adrenalin packs would be insufficient to treat the shock reactions occurring in a group of 1200 children.
Is it reasonable to assume that can weight is normally distributed? If the process remains in control at this level, what percentage of cans will be underfilled.
Using the random numbers 36, 74, 88 and 16 to determine four possible revenues per mature tree for the new tree, simulate four profit scenarios for the new tree.
What should be the annual premium (instead of $1250) if the company wants to increase the expected gain from a policy of this type by 10%?
The Mean Corporation has two major franchise operations each with many outlets across the country. Calculate the standardized values for both franchises. Give your answer rounded to 1 decimal place.
Let 2 be the mean number of dealers visited by late replacement buyers. Calculate a 95 percent confidence interval for 2 - 1. Assume here that 1 = .71 and 2 = .66.
Suppose event A and event B are mutually exclusive with the P(A)=12 and P(B)=1/3. Which of the following statements best describes these two events?
According to Cellular Telecommunications industry Association, the average local monthly cell phone bill is $42.78. What is the probability that a randomly selected cell phone bill is more than $67.75
The average cost per night of a hotel room in New York City is $273 (SmartMoney, March 2009). With 95% confidence, what is the margin of error (to 2 decimals)?
While sampling individual bags You randomly select a bag of mints. What is the probability that the bag you select is not outside the acceptable range?
Suppose that the p.d.f. of the life (in weeks) of a certain part is f(x)=3x^2/(400^3), 0<400/. Graph the p.d.f and show that the probability of the part failing in the first 200 weeks is 1/8.