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Here is a simple probability model for multiple-choice tests. Assume that each student has probability p of correctly answering the question chosen at random from universe of possible questions. (A strong student has a higher p than a weak student.) Answers to different questions are independant. Jodi is a good student for whom p=0.75
a)Use the normal approximation to find the probability that Jodi scores 70% or lower on a 100-question test.
b)If the test contains 250 questions, what is the probability that jodi will score 70% or lower?
Construct a payoff table for Mountain Ski's decision problem of how many pairs of skis to order. What is the best decision from an expected value basis?
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
For following two regressions describe and interpret major parts from regression output. write down the difference between two regressions?
An experiment consists of flipping the fair coin three times and noting the number of heads and tails. A random variable x is defined to be two times the number of heads plus the number of tails.
Run an ANOVA using only groups 1 to 6 (You can hide group 7 from the analysis by data followed by select cases and then you filter out group 7 by if GROUP~= ). Also run the posthoc tests LSD and Bonferroni.
Establish an approximate design to MTBF required for a system that will result in an approximate minimum total cost over a five year period if the system is to be operated 7500 hours per year
a. What is the probability that one randomly selected student scores above 1100 on the GRE? b. Describe the sampling distribution of the sample mean for the 16 students.
From past data, it is recognized that company's production process results in normally distributed yield strengths. Test company's claim at a = 0.05.
The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. Using exponential smoothing with a weight of alpha = 0.30, develop forecasts for years 2 through 6.
Data is distribution of the most popular colors for 2005 model luxury cars made in North America. Design the pie chart and bar graph for data.
What can be done to remedy multicollinearity? Use ANOVA instead of Regression.
Use this sample information to develop a 99% confidence interval for the population proportion of women who wear flats to work.
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