Author: Anonymous

Refer to Exhibit 3. How is the probability that a college student sleeps less than 6 hours on a weeknight compared to the probability that a college student sleeps more than 8 hours on a weeknight?

Let’s assume that  and  are two normally distributed random variables with respective values of the mean,

Refer to Exhibit 2. Which of the following Excel functions would you use to calculate the probability of having 12 or more female Uber drivers in a sample of 25 Uber trips?

Suppose there are three types of bills that can be found in a wallet. Some bills are of $1 value, some are of $5 value, and some are of $10 value. Define a random variable  that represents a bill value. Which of the following is the valid probability distribution for the variable ?

Refer to Exhibit 3. Which of the following Excel functions can be used to find the probability that a college student sleeps less than 6 hours on a weeknight ?

Exhibit 3 On weeknights, the average number of hours of sleep per night for college students is 7. Assume this random variable  follows a normal distribution with a standard deviation of 1.2 hours. Hint: For questions in this exhibit, the following reminder about format of Excel functions might be useful

Refer to Exhibit 1. Which of the following is correct?

Does listening to soothing music help employees concentrate better? A psychologist studied the number of puzzles employees of a large firm were able to solve in a 5-minute period while listening to soothing music. Let  be the number of puzzles completed successfully by an employee. The psychologist found that  has the following probability distribution: 1 2 3 4 0.2 0.4 0.3 0.1 The probability that a randomly chosen employee completes at least three puzzles in the 5-minute period while listening to soothing music is:

Which of the following experiments does NOT generate a continuous random variable?

The sampling distribution of the sample proportion