For numbers 31-37, refer to the given problem.The average time it takes for a group of college students to complete a certain examination is46.2 minutes whereas the standard deviation is 8 minutes. Fifty college students were randomly selected totake the examination. Assume that the variable is normally distributed. What is the probability that the meantime it takes for the group to complete the test will be less than 43 minutes?31. What is the population mean u?B. 43A. 8C. 46.2D. 5032. What is the population standard deviation a?А. 8В. 43C. 46.2D. 5033. What is the sample size n?А. 8B. 43C. 46.2D. 5034. What is asked in the given problem?A. P(X < 43)B. P(<43)C. P(X>43)D. P(>43)35. What formula is to be used in finding the z-score?D. z = X-4VILH-XB. Z =X-C. z = -8A. z =of36. What is the answer to the question?В. 15.54%A. 0.23%С. 23%D. 34.46%

Given that Mean=46.2 Standard deviation=5 Sample size=50 Note: According to bartleby experts…

Answered: 31. What is the population mean u? В.…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

1) The average amount of rainfall in Puerto Rico during the past month was 3.5 inches, according to the National Meteorology Center. Suppose that a normal distribution can be used and that the standard deviation is 0.8 inches. to. What percentage of the time last month's rainfall was greater than 4 inches? b. What percentage of the time was the rainfall less than 3 inches? c. A month is considered extremely wet if the rainfall is 10% higher for that month. How much rainfall must be in April for it to be considered an extremely wet month?
A primary measure of dispersion for sample data is the sample standard deviation, s. Choose the best option to explain what the meaning of the sample standard deviation is, in general. A. The distance between one observation and the mean. B. The average distance of an observation from the middle of the distribution. C. The average distance between observations in the sample. D. The distance between the third and first quartiles.
13. Given the list of the first quarter average of selected fifteen (15) Grade 11 Arts and Design Track students; Find the sample mean, sample variance and sample standard deviation. Xx 86.6 88.1 81.4 89.01 88 93.7 85 86.7 95 89.02 90.03 91 94.07 86 90
12. A score that is 6 points below the mean corresponds to a z-score of z -2.00. What is the population %3D standard deviation? sponds
1. A sample of 205 body temperatures with a mean of 98.49oF and a standard deviation of 0.58oF. Use a 0.01 significance level to test the claim that the mean body temperatures of the population is equal to 98.6oF. Find the test statistic. Round to four decimal places. 2.A sample of 205 body temperatures with a mean of 98.49oF and a standard deviation of 0.58oF. Use a 0.01 significance level to test the claim that the mean body temperatures of the population is equal to 98.6oF. Find the p-value that associated with the test statistic. Round to four decimal places.
35. A particular fruit's weights are normally distributed, with a mean of 499 grams and a standard deviation of 7 grams. The heaviest 14% of fruits weigh more than how many grams? (Show all work)
4. Sample Size. How does the sample size affect how close to normal a distribution of either sample means or sample pro- portions will be? What are the means and standard deviations of the distributions in each case? hp
36. Packages of Lay's Potato Chips have a population standard deviation of 0.16 ounces. An SRS of 100 bags of Lay's Potato Chips have a sample mean of 18.024 ounces. What is the Standard Error for the average weight of the bags of Lay's Potato Chips ?
13) In a class of 20 students, the heights of the students have a mean of 67.4 inches and a standard deviation of 3.0 inches. The tallest student in class, a hopeful member of the basketball team, claims to be 79.8 inches tall. Is he significantly tall in his class? Work:
38. Pregnancy Lengths. Lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. a. What percentage of pregnancies last less than 250 days? b. What percentage of pregmancies last more than 300 days? (continued)
1. It is the most reliable measure of variation or dispersion? choose: Range Standard deviation Mean deviation Variance 2.The weights of ripe watermelons at Mr. Pakwan's farm are normally distributed with a standard deviation of 1.4 kg. Find the mean weight of Mr. Pakwan's ripe watermelons if only 3% weigh less than 3.5 kg. choose: 5.28 kg 3.61 kg 6.13 kg 4.90 kg thanks
49. According to the National Highway Traffic safety Administration, the average age of a driver involved in a fatal crash is 39.4 years, with a standard deviation of 17.4 years. Suppose a random sample of 50 drivers involved in a fatal crash is selected. [Source: What is the mean (µ x ) and the standard deviation (0 x ) of the sampling distribution of the sample mean? a. 39.4, 123.04 b. 39.4, 2.4607 C. 1970, 5.5720 d. 1970, 123.04 e. 39.4, 17.4

SEE MORE QUESTIONS

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

SEE MORE TEXTBOOKS

31. What is the population mean u? В. 43 A. 8 C. 46.2 D. 50 32. What is the population standard deviation a? A. 8 В. 43 C. 46.2 D. 50 33. What is the sample size n? A. 8 В. 43 C. 46.2 D. 50