Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Chapter 6 Homework: Continuous Random Variables, Quizzes of Statistics

Kentucky Community and Technical College SystemStatistics

Chapter 6 Homework: Continuous Random Variables STA 220: Statistics (4224_J101)

Typology: Quizzes

2021/2022

Available from 09/25/2022

ashish-paliwal
ashish-paliwal 🇺🇸

5

(1)

14 documents

1 / 7

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Chapter 6 Homework: Continuous Random
Variables
1. Question 1
1/1
What are the characteristics of a Normal distribution? Check all that apply.
Hide answer choices
a)
Symmetric
b)
Skewed
c)
Bell-shaped
d)
Flat
e)
f) has mean and standard deviation sigma
2. Question 2
1/1
What does the notation X~N(2,5) mean?
Hide answer choices
pf3
pf4
pf5

Partial preview of the text

Download Chapter 6 Homework: Continuous Random Variables and more Quizzes Statistics in PDF only on Docsity!

Chapter 6 Homework: Continuous Random

Variables

  1. Question 1 1/ What are the characteristics of a Normal distribution? Check all that apply. Hide answer choices a) Symmetric b) Skewed c) Bell-shaped d) Flat e) f) has mean and standard deviation sigma
  2. Question 2 1/ What does the notation X~N(2,5) mean? Hide answer choices

a) X belongs to the set N, which contains the numbers 2 and 5. b) X is normally distributed with mean = 2 and standard deviation = 5. c) X is normally distributed with mean = 5 and standard deviation=2. d) X is a normally distributed variable than can equal 2 or 5.

  1. Question 3 1/ What are the mean and standard deviation of the normal distribution curve pictured below? Hide answer choices a) mean = 80 and standard deviation = 20 b) c) d)

IQ scores are normally distributed with a mean of 100 and standard deviation 16. Calculate the z-score for an IQ of 76. Include one decimal place in your answer. Your Answer: -1.

  1. Question 7 1/ What does a z-score of -2 tell us about a data value? Hide answer choices a) The data value is 2 standard deviations above the mean. b) The data value is 2 standard deviations below the mean. c) The data value is -2 times the mean. d) The data value is 2 points less than the mean.
  2. Question 8 1/ Male heights are normally distributed with a mean of 70 inches and standard deviation 2. Female heights are normally distributed with a mean of 64 and standard deviation 2.5. Who is taller relative to their gender? A 73 inch tall male, or a 67 inch tall female? How do you know? Hide answer choices a) The 73 inch tall male is taller relative to his gender because his z-score is higher. b)

The 67 inch tall female is taller relative to her gender because her z-score is higher. c) The male and the female have the same z-score, so they are both equally tall relative to their gender. d) The male and the female are both 3 inches taller than the mean, so they are equally tall relative to their gender.

  1. Question 9 1/ IQ scores are normally distributed with mean = 100 and standard deviation = 16. Use the Empirical Rule to determine the percentage of people who have an IQ score between 84 and 116. Hide answer choices a) 68% b) 95% c) 99.7% d) 100%
  2. Question 10 1/ IQ scores are normally distributed with mean = 100 and standard deviation = 16. What IQ score does the letter A represent in the diagram below? Enter your answer as a whole number with no units.

Hide answer choices a) The probability that X is greater than 4 or 9. b) The probability that X is less than 4 or 9. c) The probability that the variable X is between 4 and 9. d) The variable P times the quantity (4 < X < 9).