The governor of a state wanted to assess the public education system of the state. She instructed a group of researchers to create a test to assess the knowledge of every high school senior in the state. The researchers administered the tests and found that the average score was 74 points out of 100, with a standard deviation of 20 points. Complete parts (a) through (c) below. a. Identify the population and variable. Choose the correct population below. A. The population is the group of all high school seniors in the state. B. The population is the group of every state's governor. C. The population is the group of all high school teachers in the state. O D. The population is the group of all high school students in the state. Choose the correct variable below. A. The variable is the number of high school seniors. O B. The variable is the test length. c. The variable is the test score. O D. The variable is the number of high school students. b. For samples of size 225, find the mean u; and standard deviation o; of all possible sample mean test scores. (Type an integer or a decimal.)
The governor of a state wanted to assess the public education system of the state. She instructed a group of researchers to create a test to assess the knowledge of every high school senior in the state. The researchers administered the tests and found that the average score was 74 points out of 100, with a standard deviation of 20 points. Complete parts (a) through (c) below. a. Identify the population and variable. Choose the correct population below. A. The population is the group of all high school seniors in the state. B. The population is the group of every state's governor. C. The population is the group of all high school teachers in the state. O D. The population is the group of all high school students in the state. Choose the correct variable below. A. The variable is the number of high school seniors. O B. The variable is the test length. c. The variable is the test score. O D. The variable is the number of high school students. b. For samples of size 225, find the mean u; and standard deviation o; of all possible sample mean test scores. (Type an integer or a decimal.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
Related questions
Concept explainers
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Topic Video
Question
Transcribed Image Text:The governor of a state wanted to assess the public education system of the state. She instructed a group of researchers to create a test to assess the knowledge of
every high school senior in the state. The researchers administered the tests and found that the average score was 74 points out of 100, with a standard deviation of
20 points. Complete parts (a) through (c) below.
a. Identify the population and variable.
Choose the correct population below.
A. The population is the group of all high school seniors in the state.
O B. The population is the group of every state's governor.
O C. The population is the group of all high school teachers in the state.
O D. The population is the group of all high school students in the state.
Choose the correct variable below.
O A. The variable is the number of high school seniors.
O B. The variable is the test length.
YC. The variable is the test score.
O D. The variable is the number of high school students.
b. For samples of size 225, find the mean u; and standard deviation o; of all possible sample mean test scores.
H; =
(Type an integer or a decimal.)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Knowledge Booster
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
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Algebra
ISBN:
9781680331141
Author:
HOUGHTON MIFFLIN HARCOURT
Publisher:
Houghton Mifflin Harcourt
Glencoe Algebra 1, Student Edition, 9780079039897…
Algebra
ISBN:
9780079039897
Author:
Carter
Publisher:
McGraw Hill
Big Ideas Math A Bridge To Success Algebra 1: Stu…
Algebra
ISBN:
9781680331141
Author:
HOUGHTON MIFFLIN HARCOURT
Publisher:
Houghton Mifflin Harcourt