In a newspaper's survey of 484 people, 54.3% said that we should replace passwords with biometric security, such as fingerprints. The accompanying Statdisk display results from a test of the claimthat 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 levelto complete parts (a) through (e).Sample proportion: 0.5433884Test Statistic, z: 1.9091Critical z: ±1.6449P-value: 0.0563a. Is the test two-tailed, left-tailed, or right-tailed?Choose the correct answer below.left-tailedtwo-tailedright-tailedb. What is the test statistic?z=(Round to two decimal places as needed.)

In the given scenario, the Statdisk display is given as follows:Sample proportion: 0.5433884Test…

Answered: In a newspaper's survey of 484 people,…

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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Q7
Pages were randomly selected from The Bear and the Dragon by Tom Clancy, Harry Potter and the Sorcerer's Stone by J.K. Rowling, and War and Peace by Leo Tolstoy. The Flesch Reading Ease scores for those pages are listed below. Use a 0.05 significance level to test the claim that the three samples are from populations with the same mean. Clancy 58.2 73.4 73.1 64.4 72.7 89.2 43.9 76.3 76.4 78.9 69.4 72.9 Rowling 85.3 84.3 79.5 82.5 80.2 84.6 79.2 70.9 78.6 86.2 74.0 83.7 Part (B) Identify the test statistic and the P-value The test statistic F= The P-value is notation.) Tolstoy 69.4 64.2 71.4 71.6 68.5 51.9 72.2 74.4 52.8 58.4 65.4 73.6 (Round to four decimal places.) (Round to six decimal places. Do not use scientific
Find the Mean and variance for the prompts below: State Farm Insurance Company reports that approximately 65% of all automobile damage liability claims are made by people under 20 years of age. A random sample of fifteen automobile insurance claims are under study.
Consider a binomial distribution. About 61% of all Salinas residents own a smart phone. Find the mean number of residents own a smart phone when selecting a sample of n = 53 residents.
In each of the following settings, decide whether you should use two-sample z procedures for a difference in proportions, two- sample t procedures for a difference in means, or paired t procedures for a mean difference. (a) A city planner is comparing traffic patterns at two different intersections. He randomly selects 12 times between 6:00 a.m. and 10:00 p.m., and he and his assistant count the number of cars passing through each intersection during the 10- minute interval that begins at that time. O Two-sample z test for p1 – P2 O Two-sample t test for µ – H2 Two-sample t test for x1 – x2 Paired t test for µdiff (b) How much greater is the proportion of senior citizens who attend a play at least once per year than the proportion of 20- somethings who do so? Random samples of 100 senior citizens and 100 people in their 20s were surveyed. Two-sample z test for p – P2 O Two-sample t test for x1 X2 O Two-sample t test for p1 – P2 O Two-sample t test for µ – µ2 (c) Luke's taco shop is…
Cite a statistical experiment and its sample space.
Previously, an organization reported that teenagers spend 12.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is lower. Twenty-three randomly chosen teenagers were asked how many hours per week they spend on the phone, with the following results (in hours): 10.4, 10.4, 17.3, 11.2, 10, 15.2, 9.5, 5.8, 12.5, 11.8, 7.3, 10.6, 11.5, 16.2, 16.5, 14.3, 12.3, 9.9, 13.7, 8.6, 11.3, 13, 16.5 Perform a hypothesis test using a 10% level of significance. Step 1: State the null and alternative hypotheses. Ho: pv 12.5 12.5 (So we will be performing a left-tailed Vv test.) Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are t-distributed with distribution mean and distribution standard deviation Step 3: Find the p-value of the point estimate. = P(tv sv p-value = Step 4: Make a Conclusion About the nulI…
A. What is the mean, median and mode? Separate answers with a single comma, i.e. 3.000,3.000,3.000 b. What is the standard deviation and sample variance? separate answers with a comma, i.e. 3.000,9.000 c.What is the largest value, smallest value and the sum of values? Separate answers with a comma, i.e. 4.543,11.345,46.000
It is generally believed that nearsightedness affectsabout 12% of all children. A local elementary school registered 133 incoming kindergarteners. Part A: Describe the sampling distribution model for the sample proportion by identifying its shape and telling its mean and standard deviation.Part B: What is the probability that more than 15% of the incoming kindergarteners are nearsighted?
A recent national report states the marital status distribution of the male population age 18 or older is as follows: Never Married (31.5%), Married (55.7%), Widowed (2.7%), Divorced (10.1%). The table below shows the results of a random sample of 1620 adult men from California. Test the claim that the distribution from California is as expected at the a = 0.01 significance level. a. Complete the table by filling in the expected frequencies. Round to the nearest whole number: Frequencies of Marital Status Outcome Frequency Expected Frequency Never Married 507 Married 896 Widowed 46 Divorced 171 b. What is the correct statistical test to use? Select an answer c. What are the null and alternative hypotheses? OMarital status and residency are dependent. Marital status and residency are independent. The distribution of marital status in California is the same as it is nationally. OThe distribution of marital status in California is not the same as it is nationally. Marital status and…
a. Identify the two different cases considered in discussing the sampling distribution of the mean sample.
A polling company contends that an agent conducts a mean of 53 in-depth home surveys every week. A streamlined survey form has been introduced, and the company wants to evaluate its effectiveness. The number of in-depth surveys conducted during a week by a random sample of agents are: 50 55 58 54 60 52 59 62 60 60 51 53 57 59 56 If we want to test at the .05 level of significance, whether the mean number of interviews conducted by the agents is more than 53 per week, which of the following findings would be correct? Select one: a. The test statistic, critical value are 1.034 and 1.761 respectively and the decision is not to reject the Ho. b.The test statistic, critical value are 3.667 and 1.761 respectively and the decision is to reject the Ho. c. The test statistic, critical value are 3.7378 and 1.761 respectively and the decision is to reject the Ho. d. The test statistic, critical value are 1.034 and 1.761 respectively and the decision is not to reject the Ho. e. The test statistic,…

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