A researcher studying reaction time of drivers states that A 95% confidence interval for the m time it takes for a driver to apply the brakes after seeing the brake lights on a vehicle in front of him 1.2.to 1.8 seconds."/Which of the foll owing claims is justified? A reporter claims that any randomly selected driver will take at least 1.2 seconds to apply the brakes after seeing the brake lights on a vehicle in front of him. mean a. b. the brake lights on a vehicle in front of him is at least 1.2 seconds. A reporter claims that the mean amount of time it takes to apply the brakes after seeing A reporter claims that it takes at least 2 seconds to apply the brakes after seeing the brake lights on a vehicle in front of him. C. A reporter claims that it takes 1.2 or 1.8 seconds to apply the brakes after seeing the d. brake lights on a vehicle in front of him. A reporter claims that it takes at least 1.5 seconds to apply the brakes after seeing the brake lights on a vehicle in front of him. e. What is the critical value * fora 99% confidence interval when n = 20? a. 2.086 b. 2.093 2.576 d. 2.845 19.6 The weights of 9 men have mean= 175 pounds and standard deviation s= 15 pounds What is the standard error of the mean? %3D 15 C. d. 1.67 e. 1.29 Other things being equal, the margin of error of a confidence interval increases as the a. sample size increases. b. sample mean increases. confidence level increases. d. confidence level decreases. C. e. none of the above. An SRS of 100 postal employees found that the average time these employees had worked for the postal service was x 7 years with standard deviation s 2 years. Assume the distributi on of the time the population of employees have worked for the postal service is approximately Normal. Which of the following gives the correct 95% confidence interval for the mean time u the population of postal service employees have worked for the postal service? %3D て干L b. 7 1.984 c. 7 0.525 d. 7 0.4 e. 7 0.2 a.
A researcher studying reaction time of drivers states that A 95% confidence interval for the m time it takes for a driver to apply the brakes after seeing the brake lights on a vehicle in front of him 1.2.to 1.8 seconds."/Which of the foll owing claims is justified? A reporter claims that any randomly selected driver will take at least 1.2 seconds to apply the brakes after seeing the brake lights on a vehicle in front of him. mean a. b. the brake lights on a vehicle in front of him is at least 1.2 seconds. A reporter claims that the mean amount of time it takes to apply the brakes after seeing A reporter claims that it takes at least 2 seconds to apply the brakes after seeing the brake lights on a vehicle in front of him. C. A reporter claims that it takes 1.2 or 1.8 seconds to apply the brakes after seeing the d. brake lights on a vehicle in front of him. A reporter claims that it takes at least 1.5 seconds to apply the brakes after seeing the brake lights on a vehicle in front of him. e. What is the critical value * fora 99% confidence interval when n = 20? a. 2.086 b. 2.093 2.576 d. 2.845 19.6 The weights of 9 men have mean= 175 pounds and standard deviation s= 15 pounds What is the standard error of the mean? %3D 15 C. d. 1.67 e. 1.29 Other things being equal, the margin of error of a confidence interval increases as the a. sample size increases. b. sample mean increases. confidence level increases. d. confidence level decreases. C. e. none of the above. An SRS of 100 postal employees found that the average time these employees had worked for the postal service was x 7 years with standard deviation s 2 years. Assume the distributi on of the time the population of employees have worked for the postal service is approximately Normal. Which of the following gives the correct 95% confidence interval for the mean time u the population of postal service employees have worked for the postal service? %3D て干L b. 7 1.984 c. 7 0.525 d. 7 0.4 e. 7 0.2 a.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
Related questions
Question
Transcribed Image Text:A researcher studying reaction time of drivers states that A 95% confidence interval for the m
time it takes for a driver to apply the brakes after seeing the brake lights on a vehicle in front of him
1.2.to 1.8 seconds."/Which of the foll owing claims is justified?
A reporter claims that any randomly selected driver will take at least 1.2 seconds to
apply the brakes after seeing the brake lights on a vehicle in front of him.
mean
a.
b.
the brake lights on a vehicle in front of him is at least 1.2 seconds.
A reporter claims that the mean amount of time it takes to apply the brakes after seeing
A reporter claims that it takes at least 2 seconds to apply the brakes after seeing the brake
lights on a vehicle in front of him.
C.
A reporter claims that it takes 1.2 or 1.8 seconds to apply the brakes after seeing the
d.
brake lights on a vehicle in front of him.
A reporter claims that it takes at least 1.5 seconds to apply the brakes after seeing the
brake lights on a vehicle in front of him.
e.
What is the critical value * fora 99% confidence interval when n = 20?
a.
2.086
b. 2.093
2.576
d. 2.845
19.6
The weights of 9 men have mean= 175 pounds and standard deviation s= 15 pounds What is the
standard error of the mean?
%3D
15
C.
d. 1.67
e. 1.29
Other things being equal, the margin of error of a confidence interval increases as the
a. sample size increases.
b. sample mean increases.
confidence level increases.
d. confidence level decreases.
C.
e.
none of the above.
An SRS of 100 postal employees found that the average time these employees had worked for the
postal service was x 7 years with standard deviation s 2 years. Assume the distributi on of the time
the population of employees have worked for the postal service is approximately Normal. Which of
the following gives the correct 95% confidence interval for the mean time u the population of postal
service employees have worked for the postal service?
%3D
て干L
b. 7 1.984
c. 7 0.525
d. 7 0.4
e. 7 0.2
a.
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