The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average,the reduction in systolic blood pressure is 79.9 mmHg (millimeters of mercury) for a sample of size 1025and a sample standard deviation 6.7 mmHg. How much of mmHg will lower for a typical patient's systolicblood pressure after taking the drug? Estimate with a 95% confidence.Preliminary:a. Is it safe to assume that n ≤ 5% of all patients with a systolic blood pressure?YesO Nob. Is n > 30 ?NoYesConfidence Interval: What is the 95% confidence interval to estimate the population mean? Round youranswer to one decimal place.

given data n = 1025x¯ =79.9s = 6.795% ci for population mean(μ)

Answered: The effectiveness of a blood-pressure…

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 study on infants, one of the characteristics measured was head circumference. The mean head circumference of 8 infants was 34.5 centimeters (cm). Complete parts (a) through (d) below. Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve. CCCC a. Assuming that head circumferences for infants are normally distributed with standard deviation 2.3 cm, determine a 90% confidence interval for the mean head circumference of all infants. The confidence interval for the mean head circumference of all infants is from em to cm (Round to one decimal place as needed.)
A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of 50 people shows that the mean tuna consumption by a person is 3.2 pounds per year. Assume the population standard deviation is 1.06 pounds. At a= 0.02, can you reject the claim? B. H : μ= 3.3 Hai H#3.3 A. Ho: Hs3.3 C. Ho: µ> 3.3 Ha: µ> 3.3 Ha: us3.3 E. Ho: μ>3.2 O F. Ho: H#3.2 Hạ:µ= 3.2 D. Ho: µs3.2 Hạ: H> 3.2 Hạ: us3.2 (b) Identify the standardized test statistic. (Round to two decimal places as needed.) (c) Find the P-value. (Round to three decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. A. Reject Ho. There is not sufficient evidence to reject the claim that mean tuna consumption is equal to 3.3 pounds. O B. Fail to reject Ho. There is not sufficient evidence to reject the claim that mean tuna consumption is equal to 3.3 pounds. O C. Reject Ho. There is sufficient evidence to reject the claim that mean tuna consumption is equal to 3.3…
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Given the supplied information, interpret the results. Be sure to (1) tell what was done, (2) present some facts, (3) interpret the results, and (4) make a suggestion for future research. (Assume the test is two-tailed and a =.05). A statistics professor has compared the systolic blood pressure of her class (N = 24) (M = 138, s = 16) to blood pressure in the general population (u = 120) to see if taking statistics is related to higher or lower blood pressure. She found: - tcv = 2,069 -t= 5.50 •d3 1.13 •r2357% - 95% Clpir [11.23, 24.77] 整

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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=37.8σ=37.8. You would like to be 90% confident that your estimate is within 1 of the true population mean. How large of a sample size is required?
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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=56.5σ=56.5. You would like to be 95% confident that your estimate is within 1 of the true population mean. How large of a sample size is required?

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