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The test scores in a statistics course are normally distributed with a mean of 77 points and a standard deviation of 13 points. Show your work to answer the following.
a. Students need a score of 60 points to pass the exam. What is the probability that a randomly selected student will pas the exam? (P(X ≥ 60))
b. If 560 students take the exam, how many should be expected to pass (X ≥ 60) the exam?
c. What percentage of students earn an 'A' on the exam? (Students need a score of 90 points or better to earn an 'A'.)
d. If the instructor wants to assign the top 20% of her class a grade of 'A', then what score do the students need to earn an 'A'?
At the .01 significance level, can we conclude that there is more variation?
Perform the appropriate test for a difference in mean blood glucose and report the p-value for the two-tailed test of significance, assuming that the variances are equal.
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Suppose the people have weights that are normally distributed with a mean of 164lb and a standard deviation of 30lb. Find the probability?
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Given that the student you choose is a senior, find out the probability of selecting a non-senior?
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
For binomial distribution among given values for n as well as p state whereas or not it is suitable to use normal distribution as an approximation.
Support colour-coding on packaged food to indicate healthier options
To estimate the true proportion of students who abstain from alcohol at LBCC, you will need to take a simple random sample.
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