Exam 7: Continuous Probability Distributions

The variable in a normal distribution can assume any value between

The exponential distribution is continuous and the Poisson distribution is discrete,yet the two distributions are closely related.

In a T-F exam with 100 questions,passing requires a score of at least 60.What is the approximate normal probability that a "guesser" will score at least 60 points?

Compared to the area between z = 0.50 and z = 0.75,the area between z = 1.50 and z = 1.75 in the standard normal distribution will be:

The Excel function =800*RAND()would generate random numbers with standard deviation approximately equal to:

For a continuous uniform distribution U(200,400),the parameters are μ = 300 and σ = 100.

A continuous uniform distribution is always symmetric.

Excel's =RAND()function produces random numbers that are uniformly distributed between 0 and 1.The mean of this distribution is approximately

A continuous uniform distribution U(100,200)will have the same standard deviation as a continuous uniform distribution U(200,300).

If the random variable Z has a standard normal distribution,then P(1.17 ≤ Z ≤ 2.26)is:

The triangular distribution T(4,12,26)has a mean of:

Exam scores were normal in MIS 200.Jason's exam score was 1.41 standard deviations above the mean.What percentile is he in?

A student's grade on an examination was transformed to a z value of 0.67.Assuming a normal distribution,we know that she scored approximately in the top:

The area under an exponential curve can exceed 1 because the distribution is right-skewed.

On average,15 minutes elapse between discoveries of fraudulent corporate tax returns in a certain IRS office.What is the probability that less than 30 minutes will elapse before the next fraudulent corporate tax return is discovered?

Phyllis used a triangular distribution of T(10,15,20)to represent her daily commute time (minutes).Which statement is incorrect?

A large number of applicants for admission to graduate study in business are given an aptitude test.Scores are normally distributed with a mean of 460 and standard deviation of 80.What fraction of applicants would you expect to have scores of 600 or above?

A software developer makes 175 phone calls to its current customers.There is an 8 percent chance of reaching a given customer (instead of a busy signal,no answer,or answering machine).The normal approximation of the probability of reaching at least 20 customers is:

If GMAT scores for applicants at Oxnard Graduate School of Business are N(500,50)then the top 5 percent of the applicants would have a score of at least (choose the nearest integer):

We would use a normal distribution to model the waiting time until the next Florida hurricane strike.