A poll of 2,115 randomly selected adults showed that 87% of them own cell phones. The technology display below resultsfrom a test of the claim that 94% of adults own cell phones. Use the normal distribution as an approximation to thebinomial distribution, and assume a 0.01 significance level to complete parts (a) through (e).Test of p = 0.94 vs p *0.94Sample XN11844 2,115Sample p0.87186895% CI(0.853147,0.890588)a. Is the test two-tailed, left-tailed, or right-tailed?Z-Value- 13.19P-Value0.000

Test of H0 : p = 0.94. Vs Ha : p ≠ 0.94

Answered: A poll of 2,115 randomly selected…

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

The accompanying table gives results from a study of words spoken in a day by men and women. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the numbers of words spoken in a day by men vary more than the numbers of words spoken in a day by women. n X S Men Women 185 211 15,667.8 16,215.3 8,632.7 7,301.6 What are the null and alternative hypotheses? OA. Ho₂:0² #0²₂2 B. H₂:0² = 0²/2 H₁:0² > 0² H₁ : 0 ²₁2 = 0²/2 OC. H₂ : 0 ²₁2 = 0²/2 OD. H₂:0² = 0²/22 H₁:0² <0² H₁: : 0² / ± 0²/2 Identify the test statistic. F= (Round to two decimal places as needed.) Use technology to identify the P-value. The P-value is. (Round to three decimal places as needed.) What is the conclusion for this hypothesis test? O A. Reject Ho. There is insufficient evidence to support the claim that the numbers of words spoken in a day by men vary more than the numbers of words spoken in a day by women. B.…
the food marketing Institute shaow that 17% of households spend more than $100 per week on grpceries. Assume the population proportion is p=0.17 and a simple random sample of 800 households will be selected from the population. use z table. a. Calculate the sampling distribution of (p with a line on top), the proportion of households spending more than $100 per week on groceries. E(p with line on top)=_____ standard deviation(p with line on top)=_____ b. what is the probability that the sample proportion will be within +/- 0.02 of the population proportion (to 4 decimals)? c. What is the probability that the sample proportion will be within +/- 0.02 of the population proportion for a sample of 1600 households(to 4 decimals)?
The accompanying table gives results from a study of words spoken in a day by men and women. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the numbers of words spoken in a day by men vary more than the numbers of words spoken in a day by women. n x s Men 185 15,667.8 8,632.5 Women 212 16,215.5 7,301.2 What are the null and alternative hypotheses? A. H0: σ21≠σ22 H1: σ21=σ22 B. H0: σ21=σ22 H1: σ21>σ22 C. H0: σ21=σ22 H1: σ21<σ22 D. H0: σ21=σ22 H1: σ21≠σ22 Identify the test statistic. F= (Round to two decimal places as needed.) Use technology to identify the P-value. The P-value is (Round to three decimal places as needed.) What is the conclusion for this hypothesis test? A.Reject H0. There is insufficient evidence to support the claim that…
Suppose that the efficacy of a certain drug is 0.47. Consider the sampling distribution (sample size n= 179) for the proportion of patients cured by this drug.What is the mean of this distribution? What is the standard error of this distribution? Round your answer to two decimal places.
A poll of 2,188 randomly selected adults showed that 90% of them own cell phones. The technology display below results from a test of the claim that 94% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (e). Test of p = 0.94 vs p *0.94 Sample X N 1 2,188 1969 Sample p 0.899909 b. What is the test statistic? a. Is the test two-tailed, left-tailed, or right-tailed? Two-tailed test Right tailed test Left-tailed test The test statistic is -7.90 . (Round to two decimal places as needed.) c. What is the P-value? 95% CI The P-value is. (Round to three decimal places as needed.) (0.887333,0.912484) Z-Value - 7.90 P-Value 0.000
Researchers measured skulls from different time periods in an attempt to determine whether interbreeding of cultures occurred. Results are given below. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the variation of maximal skull breadths in 4000 B.C. is the same as the variation in A.D, 150. 4000 B.C. 30 131.91 mm 5.18 mm A.D. 150 30 136.44 mm 5.36 mm O B. Ho: of ±o? H1: of = o3 O D. Hoi of = 0} O A. Ho: oi = 03 OC. Ho:o =03 H,: of 203 Identify the test statistic. F= (Round to two decimal places as needed.) Use technology to identify the P-value. The P-value is (Round to three decimal places as needed.) What is the conclusion for this hypothesis test?
A sample mean for a treated group of n = 9 individuals is 32 and the population mean for the untreated group is 26. If the sample standard deviation is 9 ( is unknown), which of the following test statistics is correct? O z = .67 O z = 2.0 Ot=.67 O t = 2.0
You conduct a between-subjects ANOVA investigating whether different states produce tastier cheeses. You find that eta-squared is .50. What does this tell you? a. The effect size is small. b. 50% of the total variance in tastiness is due to differences between the states. c. The difference between the group means is .50 standard deviations. d. All of the above
The assumption of homogeneity of variances was tested, and the Levene’s test yielded a value of (p = .06). Was the assumption met?
A poll of 2,153 randomly selected adults showed that 88% of them own cell phones. The technology display below results from a test of the claim that 90% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (e). Test pf p= 0.9 vs p≠ 0.9 Sample 1 X 1893 N 2,153 Sample p 0.879238 95% CI (0.865474, 0.893002) Z-Value -3.21 P-Value 0.001 Is it a two tailed?Right tailed? Left tailed? What is the test statistic? What is the P-value? What is the null hypothesis and what is concluded about it? What is the final conclusion?
Refer to the below table. Using an alpha = 0.05, test the claim that IQ scores are the same for children in three different blood lead level groups: low lead level, medium lead level, and high lead level). One-Way Analysis of Variance Summary Table for IQ Measurements for Children among Three Blood Lead Level Groups: Low Lead Level, Medium Lead Level, and High Lead Level. Source df SS MS F p Between-group (treatment) 2 469.1827 2677.864 2.30 0.104 Within-group (error) 118 203.6918 11745.05 Total 120
Researchers measured skulls from different time periods in an attempt to determine whether interbreeding of cultures occurred. Results are given below. Assume that both samples are independent simple random samples from populations having normal distributions. Use a 0.05 significance level to test the claim that the variation of maximal skull breadths in 4000 B.C. is the same as the variation in A.D. 150. n x 4000 B.C. 30 131.92 mm A.D. 150 30 136.92 mm 5.16 mm 5.31 mm What are the null and alternative hypotheses? Hoo #0₂ H₁:0₁ = 0₂ 2 2 OC H₂O²=0² H₁ <0 2 2 Identify the test statistic. F= (Round to two decimal places as needed.) B. H₂O=0₂ H₁0² #03 *D. Hollo² = 0² 2 2 2 H₁0₁20₂ 2

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