A nutritionist conducted a survey to study the body weight (kg) of 12 randomly selected patients from hisclinic. The data collected are listed below:364145464749535454556063It is assumed that the body weights follow a normal distribution.(a) Find the sample mean, sample median, sample variance, and the sample standard deviation from theabove data.(b) Construct a 95% confidence interval estimate for the population mean weights.

Solution-: We have following data: 36,41,45,46,47,49,53,54,54,55,60,63 We want to find (a) sample…

Answered: A nutritionist conducted a survey to…

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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Listed below are the playing times (in seconds) of 16 popular songs. Find the range, variance, and standard deviation for the set of data. Does the standard deviation change much if the longest playing time is deleted? 440 244 256 253 232 270 257 292 206 261 291 242 281 277 218 245 D The range of the sample data is 234 seconds. (Type an integer or a decimal.) The variance of the sample data is (Round to one decimal place as needed.)
The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data table. Use the data to (a) find the sample mean, (b) find the sample standard deviation, and (c) construct a 98% confidence interval for the population mean. 99,714 80,587 77,739 68,186 51,847 78,675 74,043 67,469 94,467 65,553 D 44,670 86,691 61,294 57,644 54,809 77,939 74,664 50,775 61,190 56,986 46,591 88,868 47,874 99,204 80,457 79,523 83,047 92,808 63,361 92,482 84,445 63,871 73,481 76,047 62,084 (a) Find the sample mean. (Type an integer or decimal rounded to two decimal places as needed.) (b) Find the sample standard deviation. = Type an integer or decimal rounded to two decimal places as needed.) (c) Construct a 98% confidence interval for the population mean. (Round to the nearest integer as needed.)
Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the range, variance, and standard deviation for the sample data. Given that these are the top 10 salaries, do we know anything about the variation of salaries of TV personalities in general? a. the range of the sample data is $ million. (Type an integer or a decimal.) b.The variance of the sample data is (Round to two decimal places as needed.) c. The standard deviation of the sample data is $ million. (Round to two decimal places as needed.)
Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the range, variance, and standard deviation for the sample data. Given that these are the top 10 salaries, do we know anything about the variation of salaries of TV personalities in general? a. The range of the sample data is million. (Type an integer or a decimal.) b. The variance of the sample data is (Round to two decimal places as needed.) c. The standard deviation of the sample data is $million. (Round to two decimal places as needed.)
The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data table. Use the data to (a) find the sample mean, (b) find the sample standard deviation, and (c) construct a 98% confidence interval for the population mean. 100,561 81,263 78,163 67,426 51,544 67,439 93,740 65,540 79,715 73,848 44,533 87,083 60,731 58,158 54,746 78,092 47,917 98,541 80,447 92,562 63,580 74,563 50,617 60,945 91,477 84,646 80,292 64,250 74,224 57,091 47,258 89,861 75,661 61,334 81,990 (a) Find the sample mean. x=(Type an integer or decimal rounded to two decimal places as needed.) (b) Find the sample standard deviation. S= (Type an integer or decimal rounded to two decimal places as needed.) (c) Construct a 98% confidence interval for the population mean.
A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the year 2009. Using the following data, compute the sample mean, the sample standard deviation, the sample median, and the first and third quartiles. 300 140 5600 520 470 700 640 1200
A factory produces sacks of flour, a sample of 14 pieces with the following weights are taken:Find the mean, standard deviation and variance
The following data set shows the frequencies of the grouped scores for the 2008 Masters Golf competition. Final Score Frequency 280--283 284--287 8 288--291 14 292--295 296--299 300--303 2 Calculate the sample variance and standard deviation for the golf scores during the competition.
Listed below are amounts of arsenic in samples of brown rice from three different states. The amounts are in micrograms of arsenic and all samples have the same serving size. The data are from the Food and Drug Administration. Use a 0.05 significance level to test the claim that the three samples are from populations with the same mean. Assume that the distributions for each state are normal and that all variances are equal. Arkansas 4.8 4.9 5.0 5.4 5.4 5.4 5.6 5.6 5.6 5.9 6.0 6.1 California. 1.5 3.7 4.0 4.5 4.9 5.1 5.3 5.4 5.4 5.5 5.6 5.6 Texas. 5.6 5.8 6.6 6.9. 6.9 6.9 7.1 7.3 7.5 7.6 7.7 7.7
The ages of undergraduate students at two universities (one in the east and one in the west) are being compared. Researchers want to know if there is a difference in the mean age of students at the two universities. The population standard deviations are known. The following data shows the results of samples collected at each institution: School Location n (sample size) sample mean ( ) population standard deviation West 33 25.78 6.29 East 35 23.16 7.52 What is the value of the test statistic for the previous problem? (Enter your answer as a positive value even if you calculated a negative test statistic value i.e. if you calculated -1.311 you should enter 1.311). Round your answer to 3 decimal places.

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