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A statistical analysis of 1,000 long-distance telephone calls made from the headquarters of the Bricks and Clicks Computer Corporation indicates that the length of these calls is normally distribute
A super market analysed its most recent sales and determined the relationship between the way a customer paid for the item and the price category of the item. The joint probabilities in the followin
Compute the mean, median, first quartile, and third quartile for each company.
What is the likelihood that this investment will have a positive NPV? Assume that the $450 million expense of building the hotel can be written off straight line over a 30-year period
Take only 3 significant digits (in tens of dollars, for example, the first value from column B, which is earnings in the mining sector, should be 247. The second value in the data set should be 129
Briefly describe what the histogram and the stem-and-leaf display tell you about the data. What characteristics are different between histograms and stem plots?
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
Graph the points from 1998 through 2005 on a scatter diagram using Sales as the independent variable and Net Profit as the dependent variable.
Find the probability that 10 customers will arrive in a particular 15-minute period. Find the probability that 10 or fewer customers will arrive in a particular 15-minute period.
What are examples of variables that follow a binomial probability distribution? What are examples of variables that follow a Poisson distribution? When might you use a geometric probability?
Do you agree that "if two events are mutually exclusive then these two events will be independent"? Why?
Determine the shape of the distribution based on the sample data? Explain your conclusion.
Provide one business-related example each, with explanation, for mutually exclusive and independent events.
Why does APA recommend that we calculate a measure of effect size in addition to calculating the test statistic?
Compute the following. A. Mean B. Median C. Mode D. Range
a) Discuss what is meant by Quality control and quality improvement. b) What are the limitations of a quality control charts?
Suppose model C seats were produced by the thousands and suppose we selected one at random from the huge warehouse full of them. What is the probability that we get a seat that would score above an
Draw ogives from the following data and measure the median value. Verify it by actual calculation.
what is the probability of selecting a family that has either a visa card or an american card?
A recent survey by the company's marketing department has determined that among customers who have bought the product, one of eight were called.
Can you claim that the market situation has improved? Calculate the probability value and compare with significance level 0.05.
Your research hypothesis is that the mean salaries for men and women are different. Draw your conclusion at significance level 0.05.
Later we discover that the $1945 value was mis-recorded and should have been $2945. (a) Find the corrected value for the median.
What is the probability that the faulty component will be one of the two components chosen for testing?
Two dice are rolled and the two resulting values are multiplied together to form the quantity z. What are the expected value and the variance of the random variable z?