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A biology professor gives two exams and a final in the course. The professor has noticed that 80% of students get a B or better on exam 1. If a student gets a B or better on exam 1 then chance of passing the final exam is 73%. If a student gets lower than a B on exam 1 then there is a 45% chance of passing the final exam.
a) Suppose a student passes the final exam. What is the probability that the student got C or lower on the first exam? Write the question using function notation.
b) What is the probability that a student passes the final exam? Write the question using function notation
c) Suppose the professor in question 1 polls five students to see if they liked the Biology book that was used for the course. Let the random variable X measure the number of students that say they liked the book. Write out the sample space for the variable X.
Construct and interpret a 99 confidence interval to estimate the true change. State the assumptions for the confidence interval in c to be valid.
A) For each tire sold, what is the expected cost of the promotion? If required, round your answer to two decimal places. B) What is the probability that Grear will refund more than $50 for a tire? If required, round your answer to three decimal pla..
a population has u100 and sigma20. if you select a single score from this populaton on the average how close woud it be
A consumer advocacy group is concerned about the variability in the cost of a generic drug. There is cause for concern if the variance of the cost exceeds.
It is well known that similarity in attitudes, beliefs, and interests plays an important role in interpersonal attraction (see Byrne, 1971, for example). Thus, correlations for attitudes between married couples should be strong. Suppose a researcher ..
General Motors pays for employee education. The HR director would like to conduct a study on the average GPA of employees who have used this benefit to complete their degrees using a sample of education records over the past 10 years.
For a study conducted by the research department of a pharmaceutical company, 290 randomly selected individuals were asked to report the amount of money they spend annually on prescription allergy relief medication. The sample mean was found to be..
Explain why this would be described as a Prisoner's Dilemma game. Explain the probable outcome of this game.
Students whose test scores are in the upper 10% are eligible for scholarship opportunities for college. What is the test score that corresponds to the upper 10% cutoff point of the probability distribution?
Find out the probability that: First electric brush chosen is defective?
Blood tests showed a sample mean of 8.1 pH with sample standard deviation s = 0.6 pH. Use a 5% level of significance to test the claim that the drug has changed (either way) the mean pH of the blood.
traffic engineers install 9 street lights with new bulbs. the probability that a bulb will fail within 50040 hours of
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