Question: There are 40 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade

There are 40 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 6 min and a standard deviation of 6 min.
a. If grading times are independent and the instructor begins grading at 6:50 p.m. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 p.m. TV news begins?
b. If the sports report begins at 11:10, what is the probability that he misses part of the report if he waits until grading is done before turning on the TV?

Step by Step Solution

★★★★★

3.52 Rating (162 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a 11 PM 650 PM 250 minutes With T o X 1 X 40 ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

1172-M-S-D-R-V(1192).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

In the article "Graphical Display of Two-Way Contingency Tables" (The American Statistician, Vol. 28, No. 1, pp. 9-12), R. Snee presented data on hair color and eye color among 592 students in an...

a. Explain what it would mean for an association to exist between eye color and hair color. b. Do you think that an association exists between eye color and hair color? Explain your answer. c. Use...

At the beginning of this chapter, we presented a crossclassification of data on eye color and hair color collected as part of a class project by students in an elementary statistics course at the...

For the question below, I'm confused in approaching it through binomial distribution and the two distinct variables. How should I approach the question? Thank you! There are 40 students in an...

Determine z, for the following of a. (Round your answers to two decimal places.) LA USE SALT (a) a = 0.0056 (b) a = 0.11 (c) a = 0.708 You may need to use the appropriate table in the Appendix of...

There are 46 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random...

can you explain to me the question by steps There are 43 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly...

There are 48 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a rando...

A hydrodynamic voltammetry experiment from -0.3 V to 0.3 V for the reaction of Fe2+ Fe* + e* produced a half- wave potential of -0.0100 V versus SCE (E,ref = 0.2444 V) in a stirred solution....

Flower Company started doing business on January 1, 2013. For the year ended December 31, 2014, it reported $450,000 pre-tax book income on its income statement. Flower is subject to a 40% corporate...

A merchant of an e - commerce website wants to accept credit and debit cards as a form of payment. Which of the following must the merchant follow to ensure the safety of those payments? A . Gramm -...

Describe the top-down estimating technique. ____________________________________________________________

Imaging of the colon with a contrast dye to evaluate for injury requires that the colon first be distended by pumping in carbon dioxide. The article Determination of Normal Distribution of Distended...

Expert and amateur pianists were compared in a study Maintaining Excellence: Deliberate Practice and Elite Performance in Young and Older Pianists (J. Exp. Psychol. Gen. 1996: 331340). The...

Credit card spending and resulting debt pose very real threats to consumers in general, and the potential for abuse is especially serious among college students. It has been estimated that about...

Each of two companies decides to issue $10 million in 5-year debt on the same date. Each company consults its investment banker to consider alternatives. Market conditions are the following: Company...

Why is this wrong please.... kindly provide the coreect answer 2. Compute the confidence interval of population proportion. Among 1500 Filipino women included in a survey showed that 810 are...

4. Calculate the ralue of an 8% European coupon bond with face (par) value of 100 eqros and a maturity of 2 years if the yield (YTM) on similar invstment is 5% annually