An elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 4.35. Determine whether the hypothesis test for this claim isleft-tailed, right-tailed, or two-tailed.O A. two-tailedO B. right-tailedO C. left-tailedC

given data,an elementary school claims that the standard deviation in reading scores of its fourth…

Answered: An elementary school claims that the…

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

Suppose you estimate that approximately 8% of students on campus smoke. You decide to do a study about smoking and you randomly recruit 250 students to participate. a . Estimate the mean and st. deviation for this binomial situation. b. Would you be surprised if your sample contained 26 smokers? Why or why not? c. Would you be surprised if your sample contained 16 smokers? Why or why not? d. Would you be surprised if your sample contained 33 smokers? Why or why not?
The standard deviation for Mr. Smith's class's Exam 4 scores was 2.57, and the standard deviation for Mr. Jones's class's Exam 4 scores was 26.39. Which of the following must be true? a. Mr. Smith's class did better on the exam than Mr. Jones's class. b. Mr. Jones's class did better on the exam than Mr. Smith's class. c. The scores from Mr. Jones's class were more spread out than the scores Mr. Smith's class. d. The mean in Mr. Jones's was higher than the mean in Mr. Smith's class. ( don't hand writing solution)
4)Listen Provide an appropriate response. When Scholastic Achievement Scores (SAT's) are sent to test-takers, the percentiles associated with their scores are also given. Suppose a test-taker scored at the 54th percentile for their verbal grade and at the 17th percentile for their quantitative grade. Interpret these results. This student performed better than 54% of the other test-takers in the verbal part and better than 83% in the quantitative part. This student performed better than 46% of the other test-takers in the verbal part and better than 83% in the quantitative part. This student performed better than 46% of the other test-takers in the verbal part and better than 17% in the quantitative part. This student performed better than 54% of the other test-takers in the verbal part and better than 17% in the quantitative part. Question 8 (5 points)
4. Dougall compared the resting heart rate of average healthy citizens and soldiers suffering from post-traumatic stress disorder (PTSD). The normal resting heart rate for 25 healthy people averages 65 beats per minute (bpm) with a standard deviation of 6 bpm. The average heart rate of 16 people suffering from PTSD was 82 bpm with a standard deviation of 8 bpm. Use a = .05 for a two-tailed test. Does PTSD cause an elevation in resting heart rate? Complete all 4 steps of hypothesis testing.
Of interest is whether the percent of managers at High Tech Inc. that pay over $8 per day for lunch is the same as the percent of technicians. Sixty managers are surveyed and forty-six of them pay over $8 per day for lunch. One hundred forty-nine techniciansare surveyed and ninety-eight of them pay over $8 per day for lunch. The hypothesis test to use is???? independent group means, population standard deviations known independent group means, population standard deviations unknown matched or paired samples two proportions
Exam 1 scores have a mean of 500and a standard deviation of 110, while exam 2 scores have a mean of 20 and a standard deviation of 3. Assuming both types of scores have distributions that are unimodal and symmetric, which is more unusual: an exam 1 score of 790 or an exam 2 score of 28? A. The exam 2 score is more unusual. B. The exam 1 score is more unusual. C. They are the same. D. It cannot be determined which exam score is more unusual
According to the College Board, scores on the math section of the SAT Reasoning college entrance test for the class of 2010 had a mean of 516 and a standard deviation of 116. Assume that they are roughly normal.One of the quartiles of the scores from the math section of the SAT Reasoning test is 438. The other quartile is _______.
2.38 Baggage fees: An airline charges the following baggage fees: $20 for the first bag and $40 for the second. Suppose 50% of passengers have no checked luggage, 33% have only one piece of checked luggage and 17% have two pieces. We suppose a negligible portion of people check more than two bags. a) The average baggage-related revenue per passenger is: $ (please round to the nearest cent) b) The standard deviation of baggage-related revenue is: $ (please round to the nearest cent) c) About how much revenue should the airline expect for a flight of 100 passengers? $ (please round to the nearest dollar)
Which of the following describes a Type I error? A. Error associated with decisions to retain the null B. You decide that there is a statistical difference when there is actually no difference C. You decide that there is no difference when there is actually a statistical difference
In a certain test in Calculus, the mean score of a group of 100 students was 30 and the standard deviation was 8. In a test in Physics, the mean was 52 and the standard deviation was 6. If a student scored 65 in Calculus and 70 in Physics, in which test did the student perform better? O The students performed better in their Physics test O The performance is unable to determine. O The students performed the same in both tests. O The students performed better in their Calculus test
3. A small business in Irvine that sells clothing makes roughly $35 per transaction. The CEOsuspects that the business has recently been making less than usual. 40 transactions are randomlysampled from recent transactions and the dollar amount of the transaction recorded. The samplehas a mean of $32.50 and standard deviation of $2.50. a. Set up the null and alternative hypothesis (using mathematical notation/numbers and interpretthem in context of the problem) b. Calculate the test statistic for the test from part a. c. Compute the p-value for the test (use R). Round to the nearest 3rd decimal place, 0.xxx.
1) a) In a survey, 31 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $44 and standard deviation of $10.Find the margin of error at a 90% confidence level.Give your answer accurate to two decimal places. ______________ b)In a survey, 19 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $33 and standard deviation of $7.Construct a confidence interval in the form estimate ± margin of errorestimate ± margin of error at a 95% confidence level. _____________ ± _____________ Give your answers to one decimal place.

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

An elementary school claims that the standard deviation in reading scores of its fourth grade students is less than 4.35. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed. OA. two-tailed OB. right-tailed OC. left-tailed C