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What is the probability that the airline will not have enough seats for all the ticket holders who show for the flight?
A researcher wishes to know, with 98% confidence, the percentage of women who wear shoes that are too small for their feet. A previous study conducted by the Academy of Orthopedic Surgeons found tha
A total of 75 students were randomly selected and 25 students were randomly assigned to each of three format conditions. The students were asked to evaluate the effectiveness of the format on an 11-
However, if the response to advertising is favorable, then the net present value of the profits is$220,000. Finally, the when large plant is built and the demand happens to be high, the net present
The same chance of being selected as does any other group. What is the probability that at least one of the shifts will be unrepresented in the sample of workers?
The team winning the most games would be declared the national champion. How many games would the conference comisssioner have to schedule each year?
If a correlation coefficient was calculated for n = 15, alpha = 0.01, and r = 0.85, what is the test value found using the t-test?
An olympic archer is able to hit the bull's-eye 80% of the time. Assume each shot is independent of the others. If she shoots 6 arrows, what is the probablitly that she never misses?
grade point averages of math majors at a large distance education university are normally distributed with a mean of 2.85 and a standard deviation of 0.30. if a random sample of 25 math majors is se
How large a sample of one-bedroom apartments would be needed to estimate the mean within $20 with 90% confidence?
A srudy in southern california claimed that the mean commute time for all employees working in orange county exceeds 40 minutes. this figur is higher that what was the mean commute time estimated in
Assuming that the heights are recorded to the nearest half-centimeter, how many of these students would you expect to have heights. Less than 160 centimeters
What is the probability that a that a worker at Random drives more that 15 miles to work if the distribution of all worker's mileage is a Normal Distribution that ranges from 4 miles to 26 miles?
A well known soda production company maintains records concerning the number of unacceptable bottles of soda obtained from the filling and capping machines. Based on past data, the probability that
A study of a random sample of 1200 Engineering majors shows that 480 went to work for large corporations immediately after graduation, but the same is true for only 60 of 300 female Engineering majo
Is there evidence of a difference in the mean number of text messages per month for 18-24 year olds and for 45 to 54 year olds?
The amounts spent in vending machines in the United States, in billions of dollars, for the years 1999 through 2003 are given below. Determine the least squares trend equation.
Assuming the requirements of ANOVA are satisfied, at the .05 level of significance, is there evidence of a significant difference among the mean wait times at the five checkpoints?
Compute the approximate jp-value associated with the test statistic in the previous question. Does the sample data support the null hypothesis at the a- 0.05 level?
Finally, among all U.S. births, 1 in 80 is a twin birth. Find the probability that an U.S. birth results in identical twins that are female.
48 or fewer will answer the question correctly. What is the z-score that you should look up in the z-table to find the desired probability?
A 28 year old man pays $207 for a one year life insurance policy with coverage of $70,000. If the probability that he will live through the year is 0.9994, what is the expected value for the insuran
Estimate with 90% confidence the difference in the fractions of men suffering from heart disease between smokers and nonsmokers.
Consider the effectiveness of the presentation: Were the frequency distributions used effectively to report the results? Why or why not?
What would you predict the defect to be on a day when the volume is 4200 units? What would you predict the average defect rate to be for all days with production volumes of 4200?