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Using the Central Limit Theorem. In Exercises 5–8, assume that females have pulse rates that are
6. a. If 1 adult female is randomly selected, find the
b. If 25 adult females are randomly selected, find the probability that they have pulse rates with a mean greater than 70 beats per minute.
c. Why can the normal distribution be used in part (b), even though the
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- Assume time to failure density function (in months) of transplanted kidneys has a Weibull distribution with shape factor of 3 and scale of 6. Use R and answer the following questions (enter your answers with 3 decimal points):arrow_forwardA recent random sample of 7 college graduates who found a job reported their GPA and entry level salary ( nearest thousand dollars). GPA: 2.9,3.81,3.2,2.42,3.94,2.05,2.25 Salary:48,53,50,37,65,32,37 For a unit increase in GPA, how much more in Salary is predicted?arrow_forwardHeart rate during laughter. Laughter is often called “the best medicine,” since studies have shown that laughter can reduce muscle tension and increase oxygenation of the blood. In the International Journal of Obesity (Jan. 2007), researchers at Vanderbilt University investigated the physiological changes that accompany laughter. Ninety subjects (18–34 years old) watched film clips designed to evoke laughter. During the laughing period, the researchers measured the heart rate (beats per minute) of each subject, with the following summary results: Mean = 73.5, Standard Deviation = 6. n=90 (we can treat this as a large sample and use z) It is well known that the mean resting heart rate of adults is 71 beats per minute. Based on the research on laughter and heart rate, we would expect subjects to have a higher heart beat rate while laughing.Construct 95% Confidence interval using z value. What is the lower bound of CI? a) Calculate the value of the test statistic.(z*) b) If…arrow_forward
- Chapter 6, Section 2-D, Exercise 071 Assume the sample is a random sample from a distribution that is reasonably normally distributed and we are doing inference for a sample mean. Find the area in a t-distribution above 2.3 if the sample has size n=6.Round your answer to three decimal places.area = Enter your answer in accordance to the question statementarrow_forwardASSESSMENT: A. Classify the random variables as discrete or continuous. 1. number of defective computers produced by a manufacturer 2. weight of newborns each year in a hospital 3. amount of paint utilized in a building project 4. average amount of electricity consumed per household per month 5. number of deaths per year attributed to lung cancerarrow_forward3.2.7 The accompanying table shows the numbers of male and female students in a particular country who received bachelor's degrees in business in a recent year. Complete parts (a) and (b) below. EA Click the icon to view the data on business degrees. (a) Find the probability that a randomly selected student is male, given that the student received a business degree. The probability that a randomly selected student is male, given that the student received a business degree, is (Round to three decimal places as needed.) Business Graduates Business degrees Nonbusiness degrees 622,758 869,681 Total 821,543 1,041,387 1,862,930 Male 198,785 Female 171,706 370,491 1,492,439 Total Print Donearrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillAlgebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage