Salt-free diets are often prescribed to people with high blood pressure. The following data values were obtained from an experiment designed to estimate the reduction in diastolic blood pressure as a result of consuming a salt-free diet for 2 weeks. Assume diastolic readings to be normally distributed.(a) Calculate a 90% confidence interval for the mean reduction.(b) Is there evidence that diastolic blood pressure is reduced by having salt-free diets, use α = 0.05. 110Patients ABCDEFGHBefore 93 106 87 92 1029588After 92 102 89 92 101 9688 105

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Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter26: Customary (english) Units Of Measure

Section: Chapter Questions

Problem 6A: Add 432.78 + 43.278 + 4.3278.

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Salt-free diets are often prescribed to people with high blood pressure. The following data values were obtained from an experiment designed to estimate the reduction in diastolic blood pressure as a result of consuming a salt-free diet for 2 weeks. Assume diastolic readings to be normally distributed.

(a) Calculate a 90% confidence interval for the mean reduction.

(b) Is there evidence that diastolic blood pressure is reduced by having salt-free diets, use α = 0.05.

110
Patients ABCDEFGH
Before 93 106 87 92 1029588
After 92 102 89 92 101 9688 105

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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