In a large section of a statistics​ class, the points for the final exam are normally​ distributed, with a mean of 7474 and a standard deviation of 99. Grades are assigned such that the top​ 10% receive​ A's, the next​ 20% received​ B's, the middle​ 40% receive​ C's, the next​ 20% receive​ D's, and the bottom​ 10% receive​ F's. Find the lowest score on the final exam that would qualify a student for an​ A, a​ B, a​ C, and a D.

Question
In a large section of a statistics​ class, the points for the final exam are normally​ distributed, with a mean of
7474
and a standard deviation of
99.
Grades are assigned such that the top​ 10% receive​ A's, the next​ 20% received​ B's, the middle​ 40% receive​ C's, the next​ 20% receive​ D's, and the bottom​ 10% receive​ F's. Find the lowest score on the final exam that would qualify a student for an​ A, a​ B, a​ C, and a D.
 

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times vary by subject and question complexity. Median response time is 34 minutes and may be longer for new subjects.
Tagged in

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: The costs of various sailboats of varying lengths are xx, length in feetyy, thousands of dollars.......

A: Given information isx is denoted by length in feety is denoted by thousands of dollars($)The best fi...

Q: Help Submit Save & Exit The mean weight of trucks traveling on a particular section of I-475 is not ...

A: Confidence interval:The (1-α) % confidence interval for population mean µ, when σ is known is given ...

Q: What is the probability of a z-score less than -0.02?

A: It is given that z-score is less than –0.02.

Q: You need to use Stata to look up the dataset and its variables. Use Stata Companion Textbook. (Datas...

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: the football coach at state university wishes to determine if there is adecrease in offensive produc...

A: From the given information, the sample size is less than 30, the population standard deviations are ...

Q: CarMD reports that the cost of repairing a hybrid vehicle is falling even while typical repairs on c...

A: 1) Hypotheses:Null hypothesis:H0: µ = 3,927Alternative hypothesis:H1: µ < 3,927Here, the sample m...

Q: Question 2 in image

A: The formula for finding average is shown below:

Q: Find the expected number of infected ducks in a sample of 5 ducks if the probability of an infected ...

A: Let the random variable X represents the number of infected ducks.It is given that the probability o...

Q: 3. A survey of 1000 U.S. adults found that 33% of people said that they would get no work done on cy...

A: (3)From the given information,P = 33% and n = 1000 Formula for confidence interval for true proporti...