Homework Help is Here – Start Your Trial Now!
Math
Statistics
Suppose the test scores of 600 students are normally distributed with a mean of 76 and standard deviation of 8. How many students scored between 70 and 82? а. 260 b. 164 с. 328 d. 272

Suppose the test scores of 600 students are normally distributed with a mean of 76 and standard deviation of 8. How many students scored between 70 and 82? а. 260 b. 164 с. 328 d. 272

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question

See attached file to answer all the questions:

Instruction: Please help me to answer all the questions correctly. Suppose the test scores of 600 students are normally distributed with a mean of 76 and standard deviation of 8. How many students scored between 70 and 82? a. 260 b. 164 с. 328 d. 272 The marks on a statistics test are normally distributed with a mean of 62 and a variance of 225. If the instructor wishes to assign B's or higher to the top 30% of the students in the class, what mark is required to get a B or higher? a. 71.53 b. 74.62 с. 69.52 d. 68.74 Suppose the adult unemployment rate of a city is 4.8%. If you had taken a survey of 100 adult and constructed a 95% confidence interval for the proportion of unemployed adults, which of the following would have been true? a. The interval would have contained 4.8%. b. The center of the interval would have been 4.8%. c. Approximately 95% of similarly constructed intervals would have captured 4.8%. d. Increasing the sample size would have ensured capturing 4.8%.
Transcribed Image Text:Instruction: Please help me to answer all the questions correctly. Suppose the test scores of 600 students are normally distributed with a mean of 76 and standard deviation of 8. How many students scored between 70 and 82? a. 260 b. 164 с. 328 d. 272 The marks on a statistics test are normally distributed with a mean of 62 and a variance of 225. If the instructor wishes to assign B's or higher to the top 30% of the students in the class, what mark is required to get a B or higher? a. 71.53 b. 74.62 с. 69.52 d. 68.74 Suppose the adult unemployment rate of a city is 4.8%. If you had taken a survey of 100 adult and constructed a 95% confidence interval for the proportion of unemployed adults, which of the following would have been true? a. The interval would have contained 4.8%. b. The center of the interval would have been 4.8%. c. Approximately 95% of similarly constructed intervals would have captured 4.8%. d. Increasing the sample size would have ensured capturing 4.8%.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Markov Processes and Markov chain
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS