Test the claim at the given significance level.A poll of 1068 adult Americans reveals that 48% of the voters surveyed prefer theDemocratic candidate for the presidency. At the 0.05 level of significance, test the claim thatat least half of all voters prefer the Democrat.Ho:H₁:Note: If the alternative hypothesis includes a symbol, enter the words "not equal to" or=/=Test statistic: z=P-value: p=ConclusionCritical value: z=(Round to three decimal places.)Note: For a two-tailed test, enter both separated by a comma. For example, enter "1.022, -1.022" (use the correct critical value in place of 1.022)We(Round to two decimal places.)(Round to four decimal places.)Therethe null hypothesis. (Enter "reject" or "fail to reject" as appropriate.)sufficient evidence to warrant rejection of the claim that at leasthalf of all voters prefer the Democrat. (Enter "is" or "is not" as appropriate.)

A poll of 1068 adult Americans reveals that 48% of the voters surveyed prefer the Democratic…

Answered: Test the claim at the given…

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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Floretta, a golfer, claims that her drive distance is not equal to 238 meters, on average. Several of her friends do not believe her, so she decides to do a hypothesis test, at a 5% significance level, to persuade them. She hits 19 drives, collects the proper data, and works through the testing procedure: • Hou = 238; HH #238 • a = 0.05 (significance level) The test statistic is X-Ho Zo == 256-238 14 V19 <= 5.6 • The critical values are -20.025 = -1.96 and 20.025 = 1.96. Conclude whether to reject or not reject Ho. and interpret the results. Select the correct answer below: Reject Ho. At the 5% significance level, the test results are not statistically significant and at best, provide weak evidence against the null hypothesis. Reject Ho. At the 5% significance level, the data provide sufficient evidence to conclude that the mean distance is not equal to 238 meters. Do not reject Ho. At the 5% significance level, the test results are not statistically significant and at best, provide…
I need help with trying to rationalize the less portion of the question. Please help me understand whether to reject or fail the hypothesis because there is or isn't enough evidence to support or reject the claim. The claim:H0: ≤1250.48 Ha: >1250.48 Standardized Test Statistic: 1.52P-Value: 0.064 (Fail to reject or reject). At the 1% significance level, there (is or is not) enough evidence to (support or reject) the claim.
A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 297 people over the age of 55, 75 dream in black and white, and among 310 people under the age of 25, 19 dream in black and white. Use a 0.05 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below. a. Identify the test statistic. z= 6.51 (Round to two decimal places as needed.) Identify the P-value. P-value = 3.770o (Round to three decimal places as needed.) What is the conclusion based on the hypothesis test? The P-value is greater than the significance level of a = 0.05, so fail to reject the null hypothesis. There is insufficient evidence to support the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. b. Test the claim by constructing an appropriate confidence…
A survey claims that 9 out of 10 doctors recommend brand Wfor their patients who have children. To test this claim against the alternative that the actual proportion of doctors who recommend brand Wis less than 90%, a random sample of 100 doctors results in 85 who indicate that they recommend brand W. 1. What decision should you makeusing a significance level of 5%? 2. Summarize your conclusions in the context of the problem.
A study was conducted to determine the proportion of people who dream in black and white instead of color. Among 294 people over the age of 55, 78 dream in black and white, and among 291 people under the age of 25, 10 dream in black and white. Use a 0.01 significance level to test the claim that the proportion of people over 55 who dream in black and white is greater than the proportion for those under 25. Complete parts (a) through (c) below indentify test statistic p value= the 90% confidence interval is
Test the claim that the mean GPA of Orange Coast students is significantly different than the mean GPA of Coastline students at the 0.1 significance level.The null and alternative hypothesis would be: H0:pO≤pCH0:pO≤pCH1:pO>pCH1:pO>pC H0:pO=pCH0:pO=pCH1:pO≠pCH1:pO≠pC H0:pO≥pCH0:pO≥pCH1:pO<pCH1:pO<pC H0:μO=μCH0:μO=μCH1:μO≠μCH1:μO≠μC H0:μO≥μCH0:μO≥μCH1:μO<μCH1:μO<μC H0:μO≤μCH0:μO≤μCH1:μO>μCH1:μO>μC The test is: left-tailed right-tailed two-tailed The sample consisted of 80 Orange Coast students, with a sample mean GPA of 2.73 and a standard deviation of 0.08, and 80 Coastline students, with a sample mean GPA of 2.68 and a standard deviation of 0.05.The test statistic is: (to 2 decimals)The p-value is: (to 2 decimals)Based on this we: Reject the null hypothesis Fail to reject the null hypothesis
The critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample data is z = 1.90, then what is the correct statistical decision? a. Fail to reject H0 b. Fail to reject H1 c. Reject H1 d. Reject H0
Q13. The null Hypothesis is rejected, if the P-value is larger than significance level.a. Trueb. False
If p-value is less than the significance level (alpha), what is the decision of a hypothesis test? a. Do not reject Ho b. Neither reject Ho c. Reject Ho d. We need data to answer this question
Help with Q4

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