A study was conducted to determine the effect of a special diet ona person's cholesterol level. The data below are the cholesterollevels of a random sample of seven middle-aged adults who wereon a regular diet and who agreed to adopt a special diet for onemonth. Cholesterol levels were taken before adopting the specialdiet and a month after.Subject123457Before196144203161240245After140153180145211200Perform the appropriate test of hypothesis to determine if thespecial diet is effective in lowering cholesterol level. Assume thatthe differences between the cholesterol levels before adopting thediet and a month after follow the normal distribution. Use a 5%level of significance.A. Perform a complete test of hypothesis.B. Select here the conclusion for this test of hypothesis.The special diet is effective in lowering cholesterol level.There is no sufficient evidence to say that the special diet is effective in lowering cholesterol level.6169145

Answered: Image /qna-images/answer/da212984-7e53-4319-964a-f4a039f60131.jpg

Answered: A study was conducted to determine the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The following data are from an experiment on carnations. The explanatory variable is the amount of inorganic bromine (micrograms per milliliter) in a plot of standard size. The response variable is the average number of flowers per carnation plant for the 30 plants grown in the plot. Which of the following statements is true? Bromine Average No. 3 4 3.2 2.9 6 3.7 C. 7 2.2 8 10 12 15 16 1.8 2.3 1.7 0.8 0.3 Select one: a. The value of r is positive and the scatterplot shows that the average number of flowers per carnation increases as the amount of bromine increases. b. The value of r is negative and the scatterplot shows that the average number of flowers per carnation decreases as the amount of bromine increases. The value of r is positive and the scatterplot shows that the average number of flowers per carnation decreases as the amount of bromine increases. d. The value of r is negative and the scatterplot shows that the average number of flowers per carnation increases as the amount…
Find the first and third quartile of these data, reference the information.
The following is data about the hemoglobin concentrations of volunteers collected at sea level and at an altitude of 11000 feet. sea level concentrations = [14.70 , 15.22, 15.28, 16.58, 15.10 , 15.66, 15.91, 14.41, 14.73, 15.09, 15.62, 14.92]11000 feet concentrations = [14.81, 15.68, 15.57, 16.59, 15.21, 15.69, 16.16, 14.68, 15.09, 15.30 , 16.15, 14.76] There are two alternative scenarios about the way the data were obtained. In scenario 1, there are 12 volunteers who lived for a month at sea level, at which time blood was drawn and the data in "sea level concentrations" dataset were obtained. Subsequently, all 12 volunteers were moved to 11000 ft and after a month the data in the "11000 feet concentrations" dataset obtained. There is a one to one correspondence between the numbers in the two datasets, that is the first numbers correspond to volunteer1, the second numbers to volunteer2 etc. In scenario 2, the "sea level concentrations" dataset is a random sample obtained from 12…
2. Are the strengths of Alloy A more consistent than Alloy B?
In a study conducted by the Department of Human Nutrition and Foods at Virginia Tech, the following data were recorded on sorbic acid residuals, in parts per million, in ham immediately after dipping in a sorbate solution and after 60 days of storage: Sorbic Acid Residuals in Ham Slice Before Storage After Storage 224 116 2 3 4 270 400 444 96 239 329 590 660 1400 680 437 597 689 6. 7 8. 576 Assuming the populations to be normally distributed, is there sufficient evidence, at the 0.05 level of significance, to say that the length of storage influences sorbic acid residual concentrations?
The owner of a cell phone store at Greenhills Shopping Center was not happy when he learned that the average number of cell phones sold daily was only 8 cell phones. He hired a new seller and told him to tally the daily sales for 20 days. The following are the number of cell phones sold for the past 20 days. 9. 9 11 12 12 16 10 12 8 11 17 18 15 14 17 14 Do the collected data present sufficient evidence to indicate that the average number of cell phones sold daily has increased? Use 0.05 level of significance. Assume normality in the population. CS Scanned with CamScanner
Use the following data to answer the questions posed below. This is data taken from a simple random sample of students a class from a large population. The variables are defined as follows: Student: Student ID. Credits: # of credits earned GPA: Current College GPA Student’s Gender: Male/Female Program: Program of study Final Exam: Students’ scores on final exam SATM: Students’ SAT math scores The data are as follows student credits gpa gender program Final Exam SATM 1 42 3.00 female Business 42.5 410 2 42 3.49 male Business 77.5 440 3 45 3.72 female Business 75.0 390 4 45 3.39 male Business 70.0 550 5 100 3.39 male Arts & Sciences 92.5 560 6 43 3.36 male Arts & Sciences 72.5 600 7 69 2.83 female Business 75.0 460 8 28 2.86 male Arts & Sciences 77.5 520 9 25 3.68 male Arts & Sciences 82.5 600 10 42 1.68 female Business 52.5 540 11 45 2.89 female Business 65.0 440 12 42 3.15 male Business 45.0 550 13 69 3.18…
Suppose samples of six different brands of diet or imitation margarine were analyzed to determine the level of physiologically active polyunsaturated fatty acids (PAPUFA, in percent), resulting in the data shown in the accompanying table. Imperial 14.1 13.6 14.6 14.3 Parkay 12.8 12.5 13.6 13.0 12.3 Blue Bonnet 13.5 13.4 14.1 14.5 Chiffon 13.2 12.7 12.6 14 Mazola 16.8 17.3 16.4 17.3 18.0 Fleischmann's 18.1 17.2 18.8 18.4 (a) Test for differences among the true means for PAPUFA percentages among the different brands. Use ? = 0.05. Calculate the test statistic. (Round your answer to two decimal places.) F = Use technology to find the P-value. (Round your answer to four decimal places.) P-value = What can you conclude? Reject H0. There is convincing evidence that the mean PAPUFA percentages for the six brands are not all equal.Fail to reject H0. There is convincing evidence that the mean PAPUFA percentages for the six brands are not all equal. Reject…
The following data were collected in an experiment designed to investigate the impact of different positions of the mother during ultrasound on fetal heart rate. Fetal heart rate is measured by ultrasound in beats per minute. The study includes 20 women who are assigned to one position and have the fetal heart rate measured in that position. Each woman is between 28-32 weeks gestation. The data are shown below. Back Side Sitting Standing 140 141 144 147 144 143 145 145 146 145 147 148 141 144 148 149 139 136 144 145 Mean= 142.0 Mean=141.8 Mean=145.6 Mean=146.8 a). Is there a significant difference in mean fetal heart rates by position? Run the test at a 10% level of significance. One way analysis of variance is used to analyze the data. Assumptions: 1. The observations are independent. 2. The parent population from which observations are taken is normal 3. Various Treatment and environmental effect are additive in nature. Answer and Explanation:
Country Britain Canada China France Germany India Indonesia Ireland Israel Italy Unemployment rate 6.4 7.0 4.1 10.2 6.7 8.8 5.7 11.5 6.3 12.3 Country Japan Mexico Pakistan Philippines Poland Russia Singapore South Korea Turkey United States Unemployment rate 3.7 4.8 6.2 7.0 12.0 4.9 2.0 3.4 8.8 6.2 4. For the data in Question 3, construct a relative frequency histogram using the given classes. Use a straightedge and neatness counts.
Caffeine: Following are the number of grams of carbohydrates in 12-ounce espresso beverages offered at a coffee shop. Construct a boxplot for these data. The first quartile is 24, median is 32, and third quartile is 39. 22 33 35 37 24 32 37 26 42 13 19 39 46 24 47 39 29 40 26 32 21 42 29 11 Send data to Excel Construct a boxplot for the given data (including outliers if any). 25 30 35 40 45 50 10 15 20
A community may be considered sociologically healthier the more variability there is in its housing values (up to a point). A major newspaper in one city investigated housing costs in several communities in its area and is running a story on its findings. For one of the communities, a random sample of 60 houses was examined, and the current market price of each house was determined. The newspaper published the following histogram summarizing these 60 prices. 20 15 10 5 0 Frequency 12 16 20 8 4 80 120 160 200 240 280 Current market price (in thousands of dollars) Based on this histogram, estimate the standard deviation of the sample of 60 prices. Carry your intermediate computations to at least four decimal places, and round your answer to at least one decimal place.

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