8. An experiment was set up to find a relationship between weight and blood pressure in normalchildren. Using hospital records for 5,000 normal children, it was found that the blood pressure wasgiven approximately byP(x) = 17.5(1+ Inx), 10≤x≤100where P(x) is measured in millimeters of mercury and x is weight measured in pounds.(Correct the answers to two decimal places.)a. Find the approximate change in blood pressure in normal children when the weight increasesfrom 30 to 31 pounds.b. Find the actual change in blood pressure in normal children when the weight increases from 30to 31 pounds.

Using the derivative formula (0.58 mmHg) gives a very close approximation to the actual change we…

Answered: 8. An experiment was set up to find a…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter13: Regression And Forecasting Models

Section: Chapter Questions

Problem 43P

See similar textbooks

Similar questions

The file P14_01.xlsx contains data on 100 consumers who drink beer. Some of them prefer light beer, and others prefer regular beer. A major beer producer believes that the following variables might be useful in discriminating between these two groups: gender, marital status, annual income level, and age. a. Use logistic regression to classify the consumers on the basis of these explanatory variables. How successful is it? Which variables appear to be most important in the classification? b. Consider a new customer: Male, Married, Income 42,000, Age 47. Use the logistic regression equation to estimate the probability that this customer prefers Regular. How would you classify this person?
Let’s suppose that you have a set of time-series variables, and you want to model the relationship between them. Read the situations given below and answer the questions. (200 words)a) Explain the statistical test if the linear combination (of time-series variables) is I(0).b) Which statistical test can be applied if all the series are integrated of the same order I(1). Justify your answer
In 2020, a manufacturing company instituted a total quality management (TQM) program producingthe comparative report shown below:[LO 17-5]Summary COQ Report(in thousands)2019 2020 % ChangePrevention costs $ 200 $ 300 +50Appraisal costs 210 315 +50Internal failure costs 190 114 −40External failure costs 1,200 621 −48Total COQ $1,800 $1,350 −25On the basis of this report, which one of the following statements is most likely correct?a. An increase in conformance costs resulted in a higher-quality product and, therefore, a decreasein nonconformance costs.b. An increase in inspection costs was solely responsible for the decrease in quality costs.c. Quality costs such as scrap and rework decreased by 48%.d. Quality costs such as returns and repairs under warranty decreased by 40%.e. Nonconformance costs increased by 50% and conformance costs decreased by approximately 47%.
The chart below is a summary of the main results of a test data set representing the population observed purchasing a virtual digital assistant. What does the accuracy rate indicate? Metrics Metric Value Accuracy (#correct) 178 Accuracy (%correct) 85.6 Specificity 0.88219 Sensitivity (Recall) 0.6 Precision 0.82400 F1 Score 0.88213 Success Class 1 Success Probability 0.4 Multiple Choice 85.6% of the population has purchased a virtual assistant. 60% of the observations are correctly classified. 85.6% of the observations are correctly classified. 14.4% of the observations are correctly classified. Explain all the incorrect answers also
Below you are given a partial computer output from a multiple regression analysis based on a sample of 16 observations. Coefficients Standard Error Constant 12.924 4.425 x1 -3.682 2.630 x2 45.216 12.560 Analysis of Variance Source ofVariation Degrees ofFreedom Sum ofSquares MeanSquare F Regression 4853 2426.5 Error 485.3 The t value obtained from the table which is used to test an individual parameter at the 1% level is a. 2.977. b. 2.921. c. 3.012. d. 2.650.
RJ produces chocolate balls. There are five samples, and each sample contains 4 packs of chocolate balls that were randomly selected and weighed. The following is the sample data: Weight (lb) Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Pack 1 0.94 1 1.05 0.98 0.93 Pack 2 1.15 0.93 1.13 0.93 0.8 Pack 3 0.88 1 1.07 0.9 1.12 Pack 4 0.96 1.06 0.97 0.89 1.01 Suppose the standard deviation is unknown, and the X-bar chart is based on 3-sigma limits. Based on the sample data, what is LCL? a 0.920 b 0.887 c 0.816 d 0.844
If you can can you show me in Excel? That is my question for 25 students Below you are given the examination scores of 25 students. 52 99 83 82 84 23 25 76 90 88 19 78 75 79 80 89 73 74 86 99 a. Calculate the mean for this data. b. Calculate a trimmed mean eliminating the obvious outliers. c. Now calculate the median for the data. Which of the above calculations do you regard as the best measure of ‘average’ class performance? Explain why.
41.The ______ are (is) used to determine the amount of money that an organization would save if it used a particular test in place of the test it currently uses to select employees. a. Brogden-Cronbach-Gleser formula b. Taylor-Russell Tables c.expectancy charts d. Lawshe tables 42.When the criterion validity coefficient is ____, and the selection ratio is ____, a test will have the most utility in selecting successful employees. a. large / large b. large / small c.small / small d. small / large 43.A test is considered to have _____ if there are race differences in test scores that are unrelated to the construct being measured. a. differential validity b. measurement bias c.selection bias d. adverse impact 44.If the selection rate for any of the protected groups is less than 80% of the…
A researcher is interested in the relationship between students’ participation in two after school programs and academic achievement. She states the following hypothesis in the description of her study: H1. Children who participate in an after school program that emphasizes critical thinking skills will score higher on measures of academic achievement and self esteem than students who participate in a program that emphasizes rote memorization. What are the variables in this study? What would be good names for the variables? Identify the independent variable(s) and dependent variable(s). Describe how each variable varies and provide justification for why each variable varies the way you describe?
Suppose a social psychologist sets out to see whether having children is related to relationship longevity. He decides to measure relationship satisfaction in a group of couples with children and a group of childless couples. He chooses the Marital Satisfaction Inventory because it refers to “partner” and “relationship” rather than “spouse” and “marriage,” which makes it useful for research with both traditional and nontraditional couples. Higher scores on the Marital Satisfaction Inventory indicate greater relationship satisfaction. The psychologist administers the Marital Satisfaction Inventory to 58 couples—30 are couples with children and 28 are childless couples. He wants to calculate the correlation between a couple’s relationship satisfaction and whether they have children. Which of the following types of correlations would be most appropriate for the psychologist to use?
The human resource manager at a car dealership wants to know if the ages of its employees are related to the department that they work in. Data was compiled and tabulated in a 2-way contingency table. The employees were classified according to their age and department.Expected counts are printed below observed countsSales Accounts Marketing RepairsTotal20-29 8 10 27 43 8817.74 *** 26.20 23.6230-39 29 26 38 22 *23.18 26.72 34.24 30.8640-49 33 32 72 82 21944.15 50.88 65.20 58.7750-59 81 106 86 54 32765.92 75.97 97.36 87.75Total 151 ** 223 201 749Chi-Sq = 5.348 + **** + 0.024 + 15.912 + 1.459 + 0.019 + 0.413 + 2.544 +2.816 + 7.003 + 0.709 + 9.182 + 3.448 + 11.875 + 1.325 + 12.983 = 80.395DF = *****, P-Value = ******No cells with expected counts less than 5.a) Name the random variables present in the table above. b) Carefully define the null and alternative hypotheses of the Chi Square test underlying the generation of the above table. c) Fill in the gaps marked by ‘*’, ‘**’, ‘***’, ‘****’…
Accountants at the Tucson firm, Larry Youdelman,CPAs, believed that several traveling executives were submittingunusually high travel vouchers when they returned from businesstrips. First, they took a sample of 200 vo uchers submitted fromthe past year. Then they developed the following multiple regressionequation relating expected travel cost to number of days onthe road (x1) and distance traveled (x2) in miles:y = $90.00 + $48.50x1 + $.40x2The coefficient of correlation computed was .68.a) If Barba ra Downey returns from a 300-miJe trip that took herout of town for 5 days, what is the expected amount she shouldclaim as expenses?b) Downey submitted a reimbursement request for $685. Whatshould the accountant do?c) Should any other variables be included? Which ones? Why?

SEE MORE QUESTIONS

Recommended textbooks for you

Practical Management Science

Operations Management

ISBN:

9781337406659

Author:

WINSTON, Wayne L.

Publisher:

Cengage,

Practical Management Science

Operations Management

ISBN:

9781337406659

Author:

WINSTON, Wayne L.

Publisher:

Cengage,

SEE MORE TEXTBOOKS