A poll of 2,114 randomly selected adults showed that 94% of them own cell phones. The technology display below shows results from a test of the claim that 91% of adults own cell phones. Using the normal distribution as an approximation to the binomial distribution, and assuming a 0.01 significance level, complete parts (a) through (e).**Test of p = 0.91 vs p ≠ 0.91**| Sample | X | N | Sample p | 95% CI | Z-Value | P-Value ||--------|------|------|----------|-----------------|---------|---------|| 1 | 1987 | 2,114| 0.939924 | (0.926612, 0.953237) | 4.81 | 0.000 |a. Is the test two-tailed, left-tailed, or right-tailed?- [ ] Two-tailed test- [ ] Right-tailed test- [ ] Left-tailed testb. What is the test statistic?- The test statistic is [__]. (Round to two decimal places as needed.)c. What is the P-value?- The P-value is [__]. (Round to three decimal places as needed.)d. What is the null hypothesis and what do you conclude about it?Identify the null hypothesis.- [ ] A. H₀: p > 0.91- [ ] B. H₀: p ≠ 0.91- [ ] C. H₀: p < 0.91- [ ] D. H₀: p = 0.91Choose the correct answer below.- [ ] A. Fail to reject the null hypothesis because the P-value is less than or equal to the significance level, α.- [ ] B. Reject the null hypothesis because the P-value is greater than the significance level, α.- [ ] C. Reject the null hypothesis because the P-value is less than or equal to the significance level, α.- [ ] D. Fail to reject the null hypothesis because the P-value is greater than the significance level, α. ### Question:**e. What is the final conclusion?**### Answer Options:- **A.** There is sufficient evidence to warrant rejection of the claim that 91% of adults own a cell phone.- **B.** There is sufficient evidence to support the claim that 91% of adults own a cell phone.- **C.** There is not sufficient evidence to warrant rejection of the claim that 91% of adults own a cell phone.- **D.** There is not sufficient evidence to support the claim that 91% of adults own a cell phone.

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Answered: A poll of 2,114 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

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In a newspaper's survey of 446 people, 53.1% said that we should replace passwords with biometric security, such as fingerprints. The accompanying Statdisk display results from a test of the claim that half of us say that we should replace passwords with biometric security. Use the normal distribution as an approximation to the binomial distribution. Use the display and a 0.10 significance level to complete parts (a) through (e). Sample proportion: 0.5313901 Test Statistic, z: 1.3258 Critical z: + 1.6449 P-value: 0.1849 ... a. Is the test two-tailed, left-tailed, or right-tailed? Choose the correct answer below. two-tailed O right-tailed left-tailed b. What is the test statistic? (Round to two decimal places as needed.) c. What is the P-value? P-value =| (Round to three decimal places as needed.) d. What is the null hypothesis, and what do you conclude about it? Activate Widows Go to Settingp to activate WIDda Next Statcrunch 4:15 PM 11/29/2021 2) O Type here to search 3. 4. 5. E U G…
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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?
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A poll of 2,094 randomly selected adults showed that 95% of them own cell phones. The technology display below results from a test of the claim that 92% 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 0.92 vs p 0.92 Sample X 1 Sample p 95% CI Z-Value P-Value 1995 2,094 0.952722 (0.943632,0.961812) 5.52 0.000 ot toilod oE ciaht tailedO
Male: 65 75 69 58 83 88 59 80 76 62 93 Female: 65 78 67 78 77 72 98 99 80 76 72 75 Assume both follow a Normal distribution. What can be concluded at the the a = 0.10 level of significance level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: Select an answer v Select an answer v Select an answer v (please enter a decimal) (Please enter a decimal) H1: Select an answer v Select an answer v Select an answer b. The test statistic ? v = (please show your answer to 3 decimal places.) c. The p-value = (Please show your answer to 4 decimal places.) d. The p-value is ? a e. Based on this, we should Select an answer v the null hypothesis. f. Thus, the final conclusion is that ... O The results are statistically significant at a = 0.10, so there is sufficient evidence to conclude that the mean final exam score for the eleven men that were observed is not the same as the mean final exam score for the twelve women that were…

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