The time spent, in minutes, on physical activities per day was recorded for a sample of college students. The 90% and 99% confidence intervals for the mean time spent on physical activities are (56.026, 59.974) and (54.909, 61.091). Which of the following would be a 95% confidence interval calculated from the sample data used to create the confidence intervals above? O (55.648, 60.352) O (56.134, 59.866) O (54.051, 61.949) (55.848, 60.552)
The time spent, in minutes, on physical activities per day was recorded for a sample of college students. The 90% and 99% confidence intervals for the mean time spent on physical activities are (56.026, 59.974) and (54.909, 61.091). Which of the following would be a 95% confidence interval calculated from the sample data used to create the confidence intervals above? O (55.648, 60.352) O (56.134, 59.866) O (54.051, 61.949) (55.848, 60.552)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:QUESTION 9
The time spent, in minutes, on physical activities per day was recorded for a sample of college students. The 90% and 99% confidence intervals for
the mean time spent on physical activities are (56.026, 59.974) and (54.909, 61.091). Which of the following would be a 95% confidence interval
calculated from the sample data used to create the confidence intervals above?
(55.648, 60.352)
(56.134, 59.866)
(54.051, 61.949)
(55.848, 60.552)
QUESTION 10
Which of the following statements is NOT true with respect to the t distribution?
The exact shape of the t distribution depends on the number of degrees of freedom.
The t distribution is symmetrical.
The t distribution is more spread out than the standard normal distribution.
The t distribution is less spread out than the standard normal distribution.
Transcribed Image Text:QUESTION 13
An IT technician recorded the time in minutes per user in a random sample of 49 students on social media on the campus WIFI network. The
resulting 95% confidence interval for the population mean was (140.2 min, 193.2 min). What is the sample mean used to calculate the given interval?
Round your answer to the nearest whole number (integer).
QUESTION 14
An IT technician recorded the time in minutes per user in a random sample of 49 students on social media on the campus WIFI network. The
resulting 95% confidence interval for the population mean was (158.2 min, 196.8 min). What is the sample standard deviation used to calculate the
given interval? Round your answer to the nearest whole number (integer).
QUESTION 15
To find out how much fat is in a common hot dog, a nutritionist recorded the amount of fat in 100 grams of a random sample of 9 brands as
follows:
4
5
5.5
6
Assume that the underlying distribution of fat in grams is normal.
a. Find the mean
decimal places.
b. Find the 95% confidence interval,
your answer to two decimal places.
6.25
and the standard deviation
6.75
7
7.758
8
of the amount of fat. Round your answer to two
for the average amount of fat in the hot dog. Round
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 2 images
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
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
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
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
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
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
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman