A professor at a local university noted that the grades of her students were normally distributed with a mean of 76 and astandard deviation of 10.The professor has informed us that 16.6 percent of her students received grades of A. What is the minimum scoreneeded to receive a grade of A?87.788.39.a.b.85.7C.d. 88.710. If 12.1 percent of her students failed the course and received F's, what is the maximum score among those whoreceived an F?63.165.4b.66.3a.C.d. 64.3A subset of a population selected to represent the population isa sampleb.11.a.a subseta small populationa parameterThe phenomenon that the sampling distribution of the sample mean can be approximated by a normaldistribution as the sample size become large is called12.the neutral theoremb. the sampling theoremthe central limit theoremthe normal distribution theorema.C.d.Which of the following sampling methods does not lead to the samples that can represent population?cluster samplingb. convenience samplingstratified samplingd. systematic sampling13.a.с.14.Stratified random sampling is a method of selecting a sample in whichthe population is first divided into strata, and then random samples are drawn from eacha.stratumb.the sample is first divided into strata, and then random samples are taken from eachstratumvarious strata are selected from the sampleNone of these alternatives is correct.с.d.

Given X~N(mu=76, sigma^2=10^2) Note: According to Bartleby an expert can solve only one question…

Answered: A professor at a local university noted…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

If the mean speed for a major league fast ball is 90 miles per hour and the standard deviation is 5 miles per hour, what would the standardized score be for a pitch that is 97 miles per hour? O 0.4 4.0 1.4 O 1.0
A person in the U.S. eats about 25 pounds of M&M's per year with a standard deviation of 3 pounds. How many M&M's would I have to eat to be in the top 20%?
A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. c. What proportion of people scored in the A range (90 or above)?d. What proportion of people failed the exam (60 or below)?
Do you prefer taking tests on paper or online? A college instructor gave identical tests to two randomly sampled groups of 50 students. One group took the test on paper and the other took it online. Those who took the test on paper had an average score of 68.4 with a standard deviation of 12.1. Those who took the test online had an average score of 71.3 with a standard deviation of 14.2. Can you conclude that the mean scores differ between online and paper tests?
Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points. Rachel scored 78 points on an exam that had a mean score of 75 points and a standard deviation of 3.7 points. Find Keenan's and Rachel's scores to the nearest hundreth.
The life span of Duracell batteries is normally distributed. The mean life span is 10,502 hours an the standard deviation is 415 hours. If 66,500 duracell batteries are manufactured, approximately how many of those batteries last at least 9,850 hours? A 39,900 B. 46,600 C. 59,900 D. 62,600
The carbon dioxide emissions of a group of nations had a mean of 9.2 and standard deviation of 1.8. a. One country's observation was 15.9. Find its z-score and interpret. b. Another country's observation was 2.6. Find its z-score and interpret. c. A third country's observation was 8.7. Find its z-score and interpret. a. The z-score is 3.73.7. This indicates that the observation of 15.9 is a distance of 3.73.7 standard deviation(s) above the mean. (Round to two decimal places as needed.)
The time is takes a studen to walk from the dorn to the chemistry lab follows roughly a Normal distrubtion with a mean of 20 minutes and a stardard deviation of 3 minutes. What porportion of students is faster than 15 minutes when walking from the dorm to the chemistry lab?
Two classes were given identical quizzes.Class A had a mean score of 8.7 and a standard deviation of 0.8Class B had a mean score of 7.8 and a standard deviation of 1.1Which class scored better on average? an answer Class A Class B Which class had more consistent scores?
A researcher in Des Moines, Iowa sampled 56 households and found the mean number of puppies per household to be 3.03. The standard deviation is 1.5. What is the 62nd percentile of the sample mean.
A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form the top 40%.
500 freshmen at Crescent High School took an algebra test. The scores were distributed normally with a mean of 75 and a standard deviation of 7. What percentage of scores are between scores 68 and 82?

SEE MORE QUESTIONS

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS