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A professor at a local university noted that the grades of her students were normally distributed with a mean of 73 and a standard deviation of 11.
1. The professor has informed us that 7.93 percent of her students received grades of A What is the minimum score needed to receive a grade of A?
2. Students who made 57.93 or lower on the exam failed the course. What percent of students failed the course?
3. If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?
What is the arithmetic mean selling price?
Determine the observed p-value for the hypothesis test and interpret this value. What does this mean?
Families USA, a monthly magazine that discusses issues related to health and health costs, surveyed 20 of its subscribers. It found that the annual health insurance premiums for a family with coverage through an employer averaged $10,979.
Determine the P value for the indicated hypothesis test with given standardized test statistic, z. Make decision whether to reject H0 for given level of significance deviation.
Differentiate between the levels of measurement by providing an example of data which can be transformed from one level of measurement to another and another example of data that cannot be transformed.
Compare and contrast a Difference of Means test with a Paired Difference test. What, fundamentally, are we testing for in each? When do you use the difference of means?
The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is:
This model is fit to the data using the method of least squares using statistical software, and the following ANOVA table is obtained
The amounts of money won by the top ten finishers in a famous car race are listed below. What was the mean prize earned? Round your answer to the nearest cents.
Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment.
In a two-tailed test, with n = 20, the computed value of t is found to be t* = 1.85. Assuming the sample is randomly selected from a normal population, then the p-value is given by:
A study of 200 advertising firms revealed their income after taxes: What is the probability an advertising firm selected at random has under $1 million in income after taxes?
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