Based on their records, a hospital claims that the proportion, p, of full-term babies born in the community that weigh more than 7 pounds is 45%. A pediatricianwho works with several hospitals in the community would like to verify the hospital's claim. In a random sample of 245 babies born in the community, 103weighed over 7 pounds. Is there enough evidence to reject the hospital's claim at the 0.10 level of significance?Perform a two-tailed test. Then complete the parts below.Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.)(a) State the null hypothesis H, and the alternative hypothesis H₁.HOH(b) Determine the type of test statistic to use.μσpxS

a) H0: p=0.45H1: p≠0.45 b) z c) The value of the test statistic is -0.931 d) p-value=0.352 e)…

Answered: Based on their records, a hospital…

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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A national survey of 2500adult citizens of a nation found that 25%dreaded Valentine's Day. The margin of error for the survey was 4.6percentage points with 85% confidence. Explain what this means. Which statement below is the best explanation? A. There is 85% confidence that 25% of the adult citizens of the nation dreaded Valentine's Day. B. In 85% of samples of adult citizens of the nation, the proportion that dreaded Valentine's Day is between 0.204 and 0.296. C. There is 85% confidence that the proportion of the adult citizens of the nation that dreaded Valentine's Day is between 0.204 and 0.296. D. There is 80.4% to 89.6% confidence that 25% of the adult citizens of the nation dreaded Valentine's Day.
Consider the sample consisting of the following nine results : 2.3, 7.2, 3.7, 4.6, 5.0, 7.0, 3.7, 4.9, 4.2.Find the upper quartile.
A software company is interested in improving customer satisfaction rate from the 55% currently claimed. The company sponsored a survey of 247 customers and found that 146 customers were satisfied. What is the test statistic z?
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The mean potassium content of a popular sports drink is listed as 132 mg in a 32-oz bottle. Analysis of 24 bottles indicates a sample mean of 131.2 mg. (a) State the hypotheses for a two-tailed test of the claimed potassium content.. a. Ho: μ= 132 mg vs. H₁: b. He: ≤132 mg vs. H₁: c. He: ≥132 mg vs. H₁: Oa Ob Oc (b) Assuming a known standard deviation of 2.1 mg, calculate the z test statistic to test the manufacturer's claim. (Round your answer to 2 decimal places. A negative value should be indicated by a minus sign.) Test statistic 132 mg >132 mg <132 mg (c) At the 2 percent level of significance (a = .02) does the sample contradict the manufacturer's claim? Decision Rule: Reject Ho
Listed below are the lead concentrations (in µg/g) measured in different Ayurveda medicines. Ayurveda is a traditional medical system commonly used in India. The lead concentrations listed here are from medicines manufactured in the United States. Assume that a simple random sample has been selected. Use a 0.05 significance level to test the claim that the mean lead concentration for all such medicines is less than 14.0 µg/g. 5.98 5.50 20.54 3.03 6.46 Identify the null and alternative hypotheses. Ho: H 14 H₁: μ 14 (Type integers or decimals. Do not round.) Identify the test statistic. = (Round to two decimal places as needed.) 7.45 12.01 20.47 11.48 17.53 D S Vi I. (1,0) More
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A software company is interested in improving customer satisfaction rate from the 65% currently claimed. The company sponsored a survey of 248 customers and found that 170 customers were satisfied. What is the test statistic z?

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