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A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years. It is known that the overall grade distribution for the department in 1985 had 14% A's, 26% B's, 31% C's, 19% D's and 10% F's. A sample of n=200 psychology students from last semester produced the following grade distribution:
A B c D F--------------------------------------------------32 61 64 31 12------------------------------------------------------Do the data indicate a significant change in the grade distribution? Test at the .05 level of significance.
Office Visits what is the age distribution of patients who make office visits to a doctor or nurse?
Below are bowling scores for several UMUC statistics professors. Based on output from ANOVA, who is the better bowler (for those of you who don't bowl, a numerically higher score indicates a better score)?
Predict the final average of a student who made an 83 on the first test. Give the value of r and r squared for this model. Interpret the value of r squared in the context of this problem.
Please explain the difference between confidence interval and significance level and how they interact or "influence" each other.
To find the probabilities values of standard normal variable
Apply the EOQ model to the following quantity discount situation in which D=500 units per year, C0=$40, and the annual holding cost rate is 20%. What order quantity do you recommend?
Can we conclude a difference in voting patterns for men vs. women? YES or NO (circle one)
Finnish Furniture manufactures tables in facilities located in three cities- Reno, Denver, and Pittsburgh. The tables are then shipped to three retail stores located in Phoenix, Cleveland, and Chicago.
What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.
If you draw one ball from the urn what is the probability that it is blue or white?
Plasma glucose levels are used to determine the presence of diabetes. Suppose the mean in (plasma-glucose) concentration (mg/dL) in 35-44 year olds is 4.86 with standard deviation = 0.54.
brief discussion telling why you chose this particular data set to study. As in discussion two, I am hoping that you will choose data that has some relevance to your life.
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