The principal of a school would like to investigate whether more than 20% of the senior learners smoke. The study involved a random sample of 120learners and 30 learners reported that they were smokers.Let:p = the population proportion of senior learners who smoke.the sample proportion of senior learners who smoke.a)Give a point estimate for p.Round your answer to 2 decimal places.Submit partb)Which one is the correct alternative hypothesis?O H1 : p < 0.25O H1 : p + 0.2О Ні:р> 0.2O H1 : p = 0.2O H1 : p < 0.2O H1 : P= 0.25О Н:р> 0.25О Н:р20.25

We have given, Favorable cases (X) = 30 and sample (n) = 120 And investigator whether more than 20%…

Answered: The principal of a school would like to…

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

According to a recent census, 14.3% of all housing units in a certain country are vacant. A county supervisor wonders if her county is different from this. She randomly selects 893 housing units in her county and finds that 162 of the housing units are vacant. Complete parts a through d below. a) State the hypotheses. Let the proportion of housing units in the county that are vacant be denoted by p. Choose the correct answer below. OA. Ho: p<0.143 HA: P = 0.143 O C. Ho: p=0.143 HA: P<0.143 OB. Ho: p=0.143 HA: P = 0.143 O D. Ho: p20.143 HA: P<0.143 b) Name the model and check appropriate conditions for a hypothesis test. What kind of test is this? Choose the correct answer below. Two-proportion t-test Difference in proportions test Proportional t-test O One-proportion z-test Check the appropriate conditions for a hypothesis test. Select the correct choice below and fill in the answer boxes within your choice. (Round to one decimal place as needed.) successes and nqo = than 10. OA. The…
A TV news reporter says that a proposed constitutional amendment is likely to win approval in the upcoming election because a poll of 541 likely voters indicated that 53% would vote in favor. The reporter goes on to say that the margin of error for this poll was 5%. Complete parts a and b below. a) Explain why the poll is actually inconclusive. Choose the correct answer below. O A. The poll is inconclusive because the standard error of the sample proportion is less than 0.50. O B. The poll is inconclusive because the margin of error is too large. OC. The poll is inconclusive because the sample size is too small. O D. The poll is inconclusive because 50% is included in the confidence interval. b) What confidence level did the pollsters use? The pollsters used a % confidence level.
Twenty different statistic students are randomly selected. For each of them,their body temperature (° F) is measured and their head circumference (in) ismeasured. Without doing any research or calculations, estimate the value of r. Forthis sample of paired data, what does r represent?
What is the solution?
Suppose the population mean IQ is equal to 100, with standard deviation equal to 15. You sample 25 individuals from this population and treat them with a “magic pill” that you're hoping makes them more intelligent. For which value of the sample mean computed on this sample would computing a p-value result in the largest value for “p” possible? a) 0 b) 100 c) 25 d) 15 e) 101
7) IQ examination scores of 450 members of a club are normally distributed with a mean of 160 and SD of 10. How many of the members of the club have IQ scores between 152 and 182. a)O 450 b) O 152 c) O 348 d) O 182
Examine the information collected on two pole jumpers practicing their event. a) Complete Jack's mean, median, and range. Round to two decimal places as needed. Jack's Successful Jump Heights (ft) Jill's Successful 12.22 11.39 12.53 12.99 12.12 12.50 Jump Heights (ft) Mean 12.42 Median 12.37 Range 1.1 b) Based on your calculations, should be chosen to represent the school team. Jack / Jill I know this because based on the mean, this person and based on the range this person is
2. Do men with more children have higher blood pressure? In a study, blood pressures of men with more than three children were compared with those of men with three or fewer children. Which of the following is true for this study? a) The response variable is blood pressure. O b) The explanatory variable is blood pressure. c) The explanatory variable is number ofchildren ("more than three" vs. "three or fewer"). d) Both a and c ENG
Help me find the sample size of a population of 500 using yamani formular
An analysis of variance produce SStotal=100 and SSwithintreatments=40. For this analysis, what is SSbetweentreatments? a)50 b)60 c)140 d)cannot be determined without additional information
Random sample of team members average practice time. Team A: x-bar=52.3, s=9.7, n=125 Team B: x-bar=45.6, s=13.3, n=120 a) Does the data provide convincing statistical evidence that team B spends less time practicing, on average, than those on Team A? b) What type of error, Type I or Typy II, could have been made and the consequences?
10) In a survey of 500 cigarette smokers, 39 of them reported that they have tried hypnosis therapy to try to quit smoking.. Can you conclude that less than one-tenth of smokers have tried hypnosis therapy? Use the a = 0.05 level of significance. %3D A) No B) Yes C) No conclusion is possible.

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