A poll of 1122 teens aged 13 to 17 showed that 55% of them have made new friends online. Use a 0.01 significance level to test the claim that half of all teens have made new friends online. Usethe P-value method. Use the normal distribution as an approximation to the binomial distribution.Let p denote the population proportion of all teens aged 13 to 17 who have made new friends online. Identify the null and alternative hypotheses.Ho p =0.5H₁p # 0.5(Type integers or decimals. Do not round.)Identify the test statistic.Z=(Round to two decimal places as needed.)

Step 1:Sample size n=1122Sample proportion p^=0.55Significance level α=0.01Assumptions : Normal…

Answered: A poll of 1122 teens aged 13 to 17…

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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When Brett Kavanaugh was nominated to be a Supreme Court justice, a survey of 1059 Americans showed that 50.6% of them disapproved of Kavanaugh. A newspaper published an article with this headline: "Majority of Americans Disapprove of Kavanaugh." Use a 0.10 significance level to test the claim made in that headline. Use the P-value method. Use the normal distribution as an approximation to the binomial distribution. Let p denote the population proportion of all Americans who disapproved of Kavanaugh. Identify the null and alternative hypotheses. Ho: P H₁: p ▼ (Type integers or decimals. Do not round.) Identify the test statistic. (Round to two decimal places as needed.) Identify the P-value. C P-value= (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. the null hypothesis. There sufficient evidence to the claim that a majority of Americans disapproved of Kavanaugh.
Use the provided randomization distribution (based on 100 samples) to estimate the p-value for this sample. samples = 100 mean = 0.341 st. dev = 0.039 40 30 20 10 0 0.20 Left Tail Two-Tail Right Tail 0.25 0.30 0.35 null = 0.33 Ja 0.40 ⠀ 0.45
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It is believed that 11% of all Americans are left-handed. A college needs to know how many left-handed desks to place in the big lecture halls being constructed on its campus. In a random sample of 120 students of its 12124 students, 15 were left-handed. Does this provide enough evidence to show that students at this college have a higher percentage of left-handers than the general American population? Use a 10% level of significance.
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When Brett Kavanaugh was nominated to be a Supreme Court justice, a survey of 1127 Americans showed that 50.6% of them disapproved of Kavanaugh. A newspaper published an article with this headline: "Majority of Americans Disapprove of Kavanaugh." Use a 0.01 significance level to test the claim made in that headline. Use the P-value method. Use the normal distribution as an approximation to the binomial distribution. tcrunch 2 W S X H and Let p denote the population proportion of all Americans who disapproved of Kavanaugh. Identify the null and alternative hypotheses. Ho: PY H₁: p < (Type integers or decimals. Do not round.) Identify the test statistic. N Z= (Round to two decimal places as needed.) Identify the P-value. P-value= (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Tech help #3 80 FS E D с 154 $ R F V % 5 T G MacBook Air B TAREHBE 9 Y H & 7 DUTO N U J 8 M ** I K H O L…
Use the order statistics approach to estimate a 90% confidence interval of 95.1% VaR for a sample size of n = 1000 observations drawn from a normal distribution with zero mean and variance one.

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