Assume that the time it takes to run the New Year's race follows a normal distribution with an average of 50 minutes and a standard deviation of 10 minutes. Questions 10 and 11 deal with the New Year's race. Question 10 Lalla sadly, runners who do not finish the race in less than 60 minutes feel poor. If Lalli chooses one runner at random, what is the probability that he is poor in Lalli's opinion? 1. about 1% 2. about 16% 3. about 23%

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
frisi wants to check the support of political parties in the Reykjavík area and decided to stand
at the entrance of Kringlan one weekend and ask people what they are going to vote for. It
was Kringlukast and a lot of good offers so many made their way there this weekend. Iris
received a total of 834 answers to the question, what are you going to vote for in the
upcoming election? "What is the main statistical problem with Iris' survey?
1. It is not corrected for placebo effect.
2. There is a risk of research bias in the survey.
3. There is a risk of sampling in the survey.
4. The number of participants is small and therefore the hypothesis tests that will be
performed will have little strength.
Assume that the time it takes to run the New Year's race follows a normal distribution with an
average of 50 minutes and a standard deviation of 10 minutes.
Questions 10 and 11 deal with the New Year's race.
Question 10
Lalla sadly, runners who do not finish the race in less than 60 minutes feel poor. If Lalli
chooses one runner at random, what is the probability that he is poor in Lalli's opinion?
1. about 1%
2. about 16%
3. about 23%
4. about 84%
Question 11
How long can a runner be at the top to finish the race if he or she intends to be in the group of
the 10% fastest runners?
1. 34.1 minutes.
2. 37.2 minutes.
3. 50 minutes.
4. 62.8 minutes.
Transcribed Image Text:frisi wants to check the support of political parties in the Reykjavík area and decided to stand at the entrance of Kringlan one weekend and ask people what they are going to vote for. It was Kringlukast and a lot of good offers so many made their way there this weekend. Iris received a total of 834 answers to the question, what are you going to vote for in the upcoming election? "What is the main statistical problem with Iris' survey? 1. It is not corrected for placebo effect. 2. There is a risk of research bias in the survey. 3. There is a risk of sampling in the survey. 4. The number of participants is small and therefore the hypothesis tests that will be performed will have little strength. Assume that the time it takes to run the New Year's race follows a normal distribution with an average of 50 minutes and a standard deviation of 10 minutes. Questions 10 and 11 deal with the New Year's race. Question 10 Lalla sadly, runners who do not finish the race in less than 60 minutes feel poor. If Lalli chooses one runner at random, what is the probability that he is poor in Lalli's opinion? 1. about 1% 2. about 16% 3. about 23% 4. about 84% Question 11 How long can a runner be at the top to finish the race if he or she intends to be in the group of the 10% fastest runners? 1. 34.1 minutes. 2. 37.2 minutes. 3. 50 minutes. 4. 62.8 minutes.
Expert Solution
steps

Step by step

Solved in 2 steps

Blurred answer
Knowledge Booster
Point Estimation, Limit Theorems, Approximations, and Bounds
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.
Similar questions
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