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Use the normal distribution of SAT critical reading scores for which the mean is 507 and the standard deviation is 121. Assume the variable x is normally distributed.
A) What percent of the SAT verbal scores are less than 675?
B) If 1000 SAT verbal scores are randomly selected about how many would you expect to be greater than 575?
Give the approximately the answers to each. Round to four decimal places as needed.
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Has the average community level of suspended particles for the month of August exceeded 30u/m3?
A busy landscaping supplies company sells wood chips for garden mulch. The mulch is sold by the cubic metre and delivered to households in a small truck.
Research question : At α = . 01, is degree of certainty independent of credits earned?
An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent.
Determine the completion time and standard deviation (σ) for project roundoff the standard deviation to the nearest hundredth: two decimal places.
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
The Starbucks in the Bauer College of Business found that 24% of customers purchase more than one cup of coffee per day from their shop. If 180 customers are randomly selected one day, what is the probability that no less than 25% of them purchase..
If you had only one minute to estimate the standard deviation of a frequency distribution using only the information that can be obtained from a stem and leaf display, how would you do it and why?
By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
Construct a frequency distribution and construct a histogram for the following data and use seven intervals, starting with 30-39.
The sample information is reported below. At the .10 significance level can we conclude that there is a difference in the amounts quoted?
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