You are asked to compare measurements in a statistically meaningful way. Two students measurethe mass of the same object in a laboratory. Student 1 records 5.3085g, 5.3107g, and 5.3041g.Student 2 records 5.3201g, 5.3197g, 5.3190g, and 5.3187g. Answer the following questions forthe t-statistics of two means.The combined degree of freedom is[ Choose ]The weighted average standard deviation of[ Choose]the pooled mean isThe calculated t-value teale is[ Choose )the tabulated t-value is (95% confidence?)| Choose ]evaluation of t-statistics yields (are the twomean the same with 95% confidence?)[ Choose )

Any assumption about the parameter or probability function is known Hypothesis testing. For the…

Answered: You are asked to compare measurements…

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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Please answer question 2 using the information in question 1! Thank You!
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Consider the population with the values {2.1, 3.3, 7.6, 8.5), list all possible samples of size n = 2 WITH REPLACEMENT and find: d. population mean e. population variance f. population standard deviation. Please write your solutions in a legible manner and draw a box around your final answers.
attempt.php?attempt-295788cmid-9447&page-5 The box plots below represent the lifetime (in months) for two brands of car battery. What is the best measure of dispersion for MARATHON brand? Give Reason. Marathon Energysia Answer: 62 63 64 65 99 5 4 73 72 1 70 69 68 67
Everest auto industry produces bearing for Mahindra Motor Corporation. The precision of radius of bearing is very important for its successful functioning. To check the variability in the bearing radius, the company randomly selected ten bearings and measured the radius, the result of which is as shown in the table below. #no Nominal radius (cm) #no Nominal radius (cm) 1 2.70 6 2.59 2 2.65 7 2.73 3 2.75 8 2.64 4 2.55 9 2.88 5 2.76 10 2.83 Calculate the sample standard deviation for the above data. Construct a box plot and check whether there is any outlier data in the data distribution. Based on the comparison between the mean and the quartile, identify the shape of the data distribution. Calculate the 65th percentile and interpret the result. What is the range of the data distribution? Explain its meaning.
A cereal maker recently sampled 20 of its medium-size oat cereal packages to determine the weights of the cereal in each package. These sample data, measured in ounces, are given below. 14.4 14.9 18.6 14.1 18.9 14.3 15.9 18.5 17.1 18.1 18.7 16.5 17.5 13.1 16.4 15.6 17.3 18.3 13.3 13.2 Calculate the first and third quartiles for these sample data. The first quartile is oz. (Type an integer or decimal rounded to two decimal places as needed.) OZ. The third quartile is (Type an integer or decimal rounded to two decimal places as needed.) OZ.
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3..
Bill Alther is a zoologist who studies Anna's hummingbird (Calypte anna). (Reference: Hummingbirds, K. Long, W. Alther.) Suppose that in a remote part of the Grand Canyon, a random sample of six of these birds was caught, weighed, and released. The weights (in grams) were as follows. 3.7 2.9 3.8 4.2 4.8 3.1 The sample mean is = 3.75 grams. Let x be a random variable representing weights of hummingbirds in this part of the Grand Canyon. We assume that x has a normal distribution and ? = 0.64 gram. Suppose it is known that for the population of all Anna's hummingbirds, the mean weight is ? = 4.30 grams. Do the data indicate that the mean weight of these birds in this part of the Grand Canyon is less than 4.30 grams? Use ? = 0.10. Level of significance = .10 Null and alternate hypotheses. - H0: ? = 4.3 g; H1: ? < 4.3 g; left-tailed Sampling Distribution - The standard normal, since we assume that x has a normal distribution with known ? Compute the z value of the sample test…
In the 2015 AFC championship game, there was a charge the New England Patriots underinflated their footballs for an advantage. The balls should be inflated to between 12.5 and 13.5 pounds per square inch. The accompanying data consists of eleven of the twenty-two measurements on the Patriots' footballs. Complete parts a and b 10.85 11.95 11.00 10.95 11.35 10.90 10.50 11.10 11.85 11.55 10.70 O a. Test the hypothesis that the population mean is less than 12.5 psi using a significance level of 0.05. State dearly whether the Patriots' footbalis are underinflated or not. Assume the conditions for a hypothesis test are satisfied. Determine the null and alternative hypotheses. Choose the correct answer below. OB. H:p 12.5 H us 125 OD. Ho: 12.5 Hu> 12.5 C. H 12.5 H ps125 OF H:p12.5 H 125 H2 125 OE Ho:u#125 H 125 The test statistic is -9.57 (Round to two decimal places as needed.) The p-value is (Round to three decimal places as needed.)
Random samples of students at 107 four-year colleges were interviewed several times since 1998. Of the students who reported drinking alcohol, the percentage who reported bingeing at least three times within the past two weeks was 41.1% of 336 students in 1998 and 21.6% of 843 students in 2004. a. Estimate the difference between the proportions in 2004 and 1998, and interpret. b. Find the standard error for this difference. Interpret it. c. Define the two relevant population parameters to compare in the context of this exercise. d. Construct and interpret a 90% confidence interval to estimate the true difference. e. State the assumptions for the confidence interval in part d to be valid. ... A. The number of students in the population in 2004 who reported drinking alcohol that binged at least three times within the past two weeks. B. The proportion of the student population in 1998 who reported drinking alcohol that binged at least three times within the past two weeks. C. The number…
To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, the Jacobs Chemical Company obtained the following data on the time (in minutes) needed to mix the material. Compute the values below (to 2 decimals, if necessary). Sum of Squares, Treatment Sum of Squares, Error a. Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use a = 0.05. Mean Squares, Treatment 0000 Mean Squares, Error Calculate the value of the test statistic (to 2 decimals). 1 17 23 21 19 What conclusion can you draw after carrying out this test? - Select your answer - Manufacturer 2 28 26 31 27 + 3 18 17 21 20 The p-value is - Select your answer - What is your conclusion? - Select your answer - b. At the a = 0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3. Calculate Fisher's LSD Value (to 2 decimals).

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