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Q1) There are 1800 students in School of Business Administration. There are 4 majors in School: Accounting, Finance, Management, and Marketing. Following illustrates the number of students in each major:
Major
#Students
Accounting
740
Finance
260
Management
620
Marketing
180
Develop percent frequency distribution and construct bar chart and pie chart.
Q2) Assume the manufacturer of Advil, common headache remedy, newly developed new formulation of drug that is claimed to be more effective. To estimate the new drug, sample of 200 current users is asked to try it. After one-month trial, 180 pointed out new drug was more efficient in relieving a headache. At same time sample of 300 current Advil users is given current drug but told it is the new formulation. From this group, 261 said it was an improvement. At the .05 significance level can we conclude that the new drug is more effective?
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
Suppose it costs $25 per student for the administrators to provide the course materials.
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. 645 of the 800 who responded were against the tax.
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
What is the 95% confidence interval for the difference between the mean prices of the two models?
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
An SRS of 100 of a certain popular model car in 1993 found that 20 had a certain minor defect in the brakes. An SRS of 400 of this model car in 1994 found that 50 had the minor defect in the brakes. Let p1 and p2 be the proportion of all cars of t..
Find out the operating characteristics for this system.
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
Create the table for frequency distribution that has 16 class intervals of width 1 inch. Utilize 61.5 inches as lower limit of first interval and 62.5 as upper limit.
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