The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, onaverage, the reduction in systolic blood pressure is 46 for a sample of size 22 and standarddeviation 19.Contruct a 95% confidence interval to estimate how much the drug will lower a typical patient'ssystolic blood pressure.Round your answer to 2 decimal places.+

Given information: x¯=46, s=19n=22

Answered: viation 19. truct a 95% confidence…

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 population of values has a normal distribution with μ=41.6 and σ=42.6. You intend to draw a random sample of size n=146.Find P53, which is the score separating the bottom 53% scores from the top 47% scores.P53 (for single values) = Find P53, which is the mean separating the bottom 53% means from the top 47% means.P53 (for sample means) = Enter your answers as numbers accurate to 1 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
SHOW ALL WORK. Interpret confidence intervals and explain the conclusions from hypothesis tests. For all hypothesis tests, clearly state the null and alternative hypotheses, the significance level, the test statistic, the p-‐value, and your conclusion. If you are using a t-statistic, clearly note how many degrees of freedom you have. 1. Consider the following data collected regarding infant blood pressure, age, and birth weight: i Birth weight in oz. (x1) Age in days (x2) Systolic Blood Pressure mmHg (y) 1 135 3 89 2 120 4 90 3 100 3 83 4 105 2 77 5 130 4 92 6 125 5 98 7 125 2 82 8 105 3 85 9 120 5 96 10 90 4 95 11 120 2 80 12 95 3 79 13 120 3 86 14 150 4 97 15 160 3 92 16 125 3 88 A. Interpret the corresponding 95% confidence intervals for both Birth weight and Age. B. What is the predicted average SBP of an infant born with birth weight 8lbs (128oz) measured at 3 days old? C. Calculate the Pearson correlation between Age and Birth weight, and test if this correlation is…
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Cereals sodium values have a mean of 167 and a standard deviation of 77.3. Find the z-score for the cereal that has a sodium value of 0. How would you interpret this z-score?
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v essentiel |calculations. Part II Record your answer in the space provided. Show Canada. They ship a large number of packages from their warehouse in Delta, Ohio. Their goal have 95 percent of the shipments delivered in 4 days. For many years they have used Brown Truck Ic., but recently there have been complaints about slow and inconsistent delivery. A sample of 10 recent shipments handled by Brown Truck showed a standard deviation in delivery time of 1.25 days. A sample of 16 shipments by Rapid Package Service showed a standard deviation in their delivery time of 0.45 days. At the 0.05 significance level is there more variation in the Brown Truck delivery time? a. State the null and alternate hypotheses. Ho- b. State the decision rule. c. Compute the value of the test statistic. c. d. What is your decision regarding the null hypothesis? Interpret the result.
Interpretation of the data. t = -3.4554, df = 6991, p-value = 0.0002763 alternative hypothesis: true mean is less than 50 95 percent confidence interval: -Inf 49.25556 sample estimates: mean of x 48.57909
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llustration 11.12. You are given the position in a factory before and after the settlement of an industrial dispute. Comment on the gains or losses from the point of the workers and that of the manage- ment. Before 2,440 45.5 After 2,359 47.5 No. of workers Mean wages Median wages Standard deviation 49.0 45.0 12.0 10.0

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viation 19. truct a 95% confidence interval to estimate how much the drug will lower a typical patient's tolic blood pressure.