8th Edition

ISBN: 9781305268920

Author: Bernard Rosner

Publisher: Cengage Learning

Concept explainers

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of tw…

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency o…

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…

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Textbook Question

Chapter 5, Problem 14P

Serum cholesterol is an important risk factor for coronary disease. We can show that serum cholesterol is approximately normally distributed, with mean = 219 mg/dL and standard deviation = 50 mg/dL.

If the clinically desirable range for cholesterol is < 200 mg/dL, what proportion of people have clinically desirable levels of cholesterol?

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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Chapter 5, Problem 13P

Chapter 5, Problem 15P

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Chapter 5 Solutions

Fundamentals of Biostatistics

Ch. 5.4 - What is the difference between a...Ch. 5.4 - Suppose a continuous random variable can only take...Ch. 5.4 - What is a standard normal distribution?Ch. 5.4 - (a) What is the area to the left of 0.2 under a...Ch. 5.4 - (a) What is z.30? What does it mean? (b) What is...Ch. 5.5 - What is the difference between a standard normal...Ch. 5.5 - What does the principle of standardization mean?Ch. 5.5 - Suppose the distribution of serum-cholesterol...Ch. 5.8 - Why do we use the normal approximation to the...Ch. 5.8 - Prob. C.2RE

Ch. 5.8 - The prevalence of glaucoma among the elderly in...Ch. 5.8 - The number of deaths from heart failure in a...Ch. 5 - Because serum cholesterol is related to age and...Ch. 5 - Because serum cholesterol is related to age and...Ch. 5 - Because serum cholesterol is related to age and...Ch. 5 - Because serum cholesterol is related to age and...Ch. 5 - Because serum cholesterol is related to age and...Ch. 5 - Suppose that total carbohydrate intake in 12- to...Ch. 5 - Suppose that total carbohydrate intake in 12- to...Ch. 5 - Suppose boys in this age range who live below the...Ch. 5 - Suppose boys in this age range who live below the...Ch. 5 - A study was conducted assessing the effect of...Ch. 5 - A study was conducted assessing the effect of...Ch. 5 - The duration of cigarette smoking has been linked...Ch. 5 - The duration of cigarette smoking has been linked...Ch. 5 - Serum cholesterol is an important risk factor for...Ch. 5 - Serum cholesterol is an important risk factor for...Ch. 5 - Serum cholesterol is an important risk factor for...Ch. 5 - People are classified as hypertensive if their...Ch. 5 - People are classified as hypertensive if their...Ch. 5 - People are classified as hypertensive if their...Ch. 5 - People are classified as hypertensive if their...Ch. 5 - Forced expiratory volume (FEV) is an index of...Ch. 5 - Forced expiratory volume (FEV) is an index of...Ch. 5 - Forced expiratory volume (FEV) is an index of...Ch. 5 - Forced expiratory volume (FEV) is an index of...Ch. 5 - The differential is a standard measurement made...Ch. 5 - The differential is a standard measurement made...Ch. 5 - The differential is a standard measurement made...Ch. 5 - The differential is a standard measurement made...Ch. 5 - The differential is a standard measurement made...Ch. 5 - The differential is a standard measurement made...Ch. 5 - Blood Chemistry In pharmacologic research a...Ch. 5 - Blood Chemistry In pharmacologic research a...Ch. 5 - Blood Chemistry In pharmacologic research a...Ch. 5 - In pharmacologic research a variety of clinical...Ch. 5 - Blood Chemistry In pharmacologic research a...Ch. 5 - A treatment trial is proposed to test the efficacy...Ch. 5 - A treatment trial is proposed to test the efficacy...Ch. 5 - A treatment trial is proposed to test the efficacy...Ch. 5 - Is the measure in Problem 5.38 a measure of...Ch. 5 - A treatment trial is proposed to test the efficacy...Ch. 5 - Refer to the pulmonary-function data in the Data...Ch. 5 - Prob. 43P Ch. 5 - Refer to the pulmonary-function data in the Data...Ch. 5 - Prob. 45P Ch. 5 - A clinical trial was conducted to test the...Ch. 5 - Well-known racial differences in blood pressure...Ch. 5 - Well-known racial differences in blood pressure...Ch. 5 - Prob. 49P Ch. 5 - Suppose we observe 84 alcoholics with cirrhosis of...Ch. 5 - What is the probability of observing at least 29...Ch. 5 - Suppose we observe 84 alcoholics with cirrhosis of...Ch. 5 - FIGURE 5.22 Plasma-aldosterone concentrations in...Ch. 5 - FIGURE 5.22 Plasma-aldosterone concentrations in...Ch. 5 - Pregnant women with gestational diabetes mellitus...Ch. 5 - Officials in the State Health Department are...Ch. 5 - Prob. 57P Ch. 5 - A study was conducted relating particulate air...Ch. 5 - Prob. 59P Ch. 5 - Refer to Data Set VALID.DAT (at...Ch. 5 - Refer to Data Set VALID.DAT (at...Ch. 5 - Prob. 62P Ch. 5 - A study concerned the risk of cancer among...Ch. 5 - Prob. 64P Ch. 5 - A doctor diagnoses a patient as hypertensive and...Ch. 5 - A doctor diagnoses a patient as hypertensive and...Ch. 5 - Suppose the physician is not sure whether the...Ch. 5 - A study compared different treatments for...Ch. 5 - A study compared different treatments for...Ch. 5 - A study compared different treatments for...Ch. 5 - Obesity is an important determinant of...Ch. 5 - Prob. 72P Ch. 5 - Prob. 73P Ch. 5 - Prob. 74P Ch. 5 - Prob. 75P Ch. 5 - Prob. 76P Ch. 5 - Answer the question in Problem 5.75 for a binomial...Ch. 5 - Prob. 78P Ch. 5 - Prob. 79P Ch. 5 - Prob. 81P Ch. 5 - Prob. 82P Ch. 5 - Prob. 83P Ch. 5 - Prob. 85P Ch. 5 - Retinitis pigmentosa (RP) is a genetic ocular...Ch. 5 - Prob. 87P Ch. 5 - Prob. 88P Ch. 5 - Prob. 89P Ch. 5 - Physicians recommend that children with type-I...Ch. 5 - Physicians recommend that children with type-I...Ch. 5 - Prob. 92P Ch. 5 - Prob. 93P Ch. 5 - Prob. 94P Ch. 5 - Prob. 95P Ch. 5 - A previous study found that people consuming large...Ch. 5 - A previous study found that people consuming large...Ch. 5 - Prob. 98P Ch. 5 - A study was recently published in Western...Ch. 5 - Prob. 100P Ch. 5 - Prob. 101P Ch. 5 - Prob. 102P Ch. 5 - Prob. 103P Ch. 5 - Prob. 104P Ch. 5 - Prob. 105P Ch. 5 - What is the 40th percentile of a normal...Ch. 5 - What is the sum of the 40th and 60th percentiles...Ch. 5 - What is z.90?Ch. 5 - A study was performed of different predictors of...Ch. 5 - A study was performed of different predictors of...Ch. 5 - Prob. 111P Ch. 5 - Prob. 112P Ch. 5 - Cancer The Shanghai Womens Health Study (SWHS) was...Ch. 5 - Prob. 114P Ch. 5 - Prob. 115P Ch. 5 - Prob. 116P Ch. 5 - Prob. 117P Ch. 5 - Prob. 118P Ch. 5 - Prob. 119P Ch. 5 - Prob. 120P Ch. 5 - Prob. 121P Ch. 5 - Prob. 122P Ch. 5 - Prob. 123P Ch. 5 - Prob. 124P Ch. 5 - Hypertension Blood pressure readings are known to...Ch. 5 - Prob. 126P Ch. 5 - Prob. 127P Ch. 5 - Prob. 128P Ch. 5 - Prob. 129P Ch. 5 - Prob. 130P

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