Fundamentals of Biostatistics
8th Edition
ISBN: 9781305268920
Author: Bernard Rosner
Publisher: Cengage Learning
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Chapter 5, Problem 108P
What is z.90?
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Suppose you are gambling on a roulette wheel. Each time the wheel is spun, the result is one of the outcomes 0, 1, and so on through 36. Of these outcomes, 18 are red, 18 are black, and 1 is green. On each spin you bet $5 that a red outcome will occur and $1 that the green outcome will occur. If red occurs, you win a net $4. (You win $10 from red and nothing from green.) If green occurs, you win a net $24. (You win $30 from green and nothing from red.) If black occurs, you lose everything you bet for a loss of $6.
a. Use simulation to generate 1,000 plays from this strategy. Each play should indicate the net amount won or lost. Then, based on these outcomes, calculate a 95% confidence interval for the total net amount won or lost from 1,000 plays of the game. (Round your answers to two decimal places and if your answer is negative value, enter "minus" sign.) I worked out the Upper Limit, but I can't seem to arrive at the correct answer for the Lower Limit. What is the Lower Limit?…
Let us suppose we have some article reported on a study of potential sources of injury to equine veterinarians conducted at a
university veterinary hospital. Forces on the hand were measured for several common activities that veterinarians engage in when
examining or treating horses. We will consider the forces on the hands for two tasks, lifting and using ultrasound. Assume that both
sample sizes are 6, the sample mean force for lifting was 6.2 pounds with standard deviation 1.5 pounds, and the sample mean force
for using ultrasound was 6.4 pounds with standard deviation 0.3 pounds. Assume that the standard deviations are known.
Suppose that you wanted to detect a true difference in mean force of 0.25 pounds on the hands for these two activities. Under the null
hypothesis, 40 0. What level of type II error would you recommend here?
=
Round your answer to four decimal places (e.g. 98.7654). Use α = 0.05.
β
= 0.0594
What sample size would be required?
Assume the sample sizes are to be…
Consider the hypothesis test Ho: 0
s² =
=
4.5; s² = 2.3. Use a
= 0.01.
=
σ against H₁: 6 > σ2. Suppose that the sample sizes are n₁ =
20 and 2
= 8, and that
(a) Test the hypothesis.
Round your answers to two decimal places (e.g. 98.76).
The test statistic is fo
=
1.96
The critical value is f
=
6.18
Conclusion:
fail to reject
the null hypothesis at a = 0.01.
(b) Construct the confidence interval on 02/2/622 which can be used to test the hypothesis:
(Round your answer to two decimal places (e.g. 98.76).)
035
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. 43PCh. 5 - Refer to the pulmonary-function data in the Data...Ch. 5 - Prob. 45PCh. 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. 49PCh. 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. 57PCh. 5 - A study was conducted relating particulate air...Ch. 5 - Prob. 59PCh. 5 - Refer to Data Set VALID.DAT (at...Ch. 5 - Refer to Data Set VALID.DAT (at...Ch. 5 - Prob. 62PCh. 5 - A study concerned the risk of cancer among...Ch. 5 - Prob. 64PCh. 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. 72PCh. 5 - Prob. 73PCh. 5 - Prob. 74PCh. 5 - Prob. 75PCh. 5 - Prob. 76PCh. 5 - Answer the question in Problem 5.75 for a binomial...Ch. 5 - Prob. 78PCh. 5 - Prob. 79PCh. 5 - Prob. 81PCh. 5 - Prob. 82PCh. 5 - Prob. 83PCh. 5 - Prob. 85PCh. 5 - Retinitis pigmentosa (RP) is a genetic ocular...Ch. 5 - Prob. 87PCh. 5 - Prob. 88PCh. 5 - Prob. 89PCh. 5 - Physicians recommend that children with type-I...Ch. 5 - Physicians recommend that children with type-I...Ch. 5 - Prob. 92PCh. 5 - Prob. 93PCh. 5 - Prob. 94PCh. 5 - Prob. 95PCh. 5 - A previous study found that people consuming large...Ch. 5 - A previous study found that people consuming large...Ch. 5 - Prob. 98PCh. 5 - A study was recently published in Western...Ch. 5 - Prob. 100PCh. 5 - Prob. 101PCh. 5 - Prob. 102PCh. 5 - Prob. 103PCh. 5 - Prob. 104PCh. 5 - Prob. 105PCh. 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. 111PCh. 5 - Prob. 112PCh. 5 - Cancer The Shanghai Womens Health Study (SWHS) was...Ch. 5 - Prob. 114PCh. 5 - Prob. 115PCh. 5 - Prob. 116PCh. 5 - Prob. 117PCh. 5 - Prob. 118PCh. 5 - Prob. 119PCh. 5 - Prob. 120PCh. 5 - Prob. 121PCh. 5 - Prob. 122PCh. 5 - Prob. 123PCh. 5 - Prob. 124PCh. 5 - Hypertension Blood pressure readings are known to...Ch. 5 - Prob. 126PCh. 5 - Prob. 127PCh. 5 - Prob. 128PCh. 5 - Prob. 129PCh. 5 - Prob. 130P
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