4. Engineers at the Maxwell Products Company have designed a new metal bearinrod that is alleged to be extremely durable. To estimate the mean useful lengthof life, engineers test nine of these rods and find that the useful length of life(in hours) of each is as follows:25,20025,40025,250Previous experience with similar such rods indicates that the useful length oflife of individual rods of this particular type is normally distributed. Constructa 90% confidence interval for the mean useful length of life of all rods of this25,00025,28025,30025,60025,01425,350new type.

For the given sample values, x¯=25266, from the excel function, =AVERAGE(O1:O9)s=186.0081, from the…

Engineers at the Maxwell Products Company have designed a new metal bearing rod that is alleged to be extremely durable. To estimate the mean useful length of life, engineers test nine of these rods and find that the useful length of lif. (in hours) of each is as follows: 25,000 25, 280 25,300 25,200 25,400 25,250 25,600 25,014 25,350 "revious experience with similar such rods indicates that tho

Engineers at the Maxwell Products Company have designed a new metal bearing rod that is alleged to be extremely durable. To estimate the mean useful length of life, engineers test nine of these rods and find that the useful length of lif. (in hours) of each is as follows: 25,000 25, 280 25,300 25,200 25,400 25,250 25,600 25,014 25,350 "revious experience with similar such rods indicates that tho

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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Reter to the mensured systolic and diastolic biood pressure mensurements of 40 andomty seiected meies and test the caimthet among men, there isa comeiation betveen systolie biood pressure and diestolic Diood pressure. Test for rank comreiation with a 0.05 sgnifcance level m Click the icon to view the blood pressure deta for men. Determine the nul and stemetive hypotheses for this test Choose the comect ansver below OA M0 O. M0 OD. HA0 Determine the coreietion coefficient -O Round to mree decimal piaces as nences) Derermine the ortical values of the comeistion coeftcient. Round to three decimal pisces as neeses. Usea comma to secarte anses as neeses) Chocse he comect enser below OA Faltoreject the nul typothesis. There is sufcient evidence to support the caimthet thereisa comiation beteen systolic and diastolic biood pressure in men. OB Reecthe nul hypothesis There is sufcient evidence to support the cam thet there is comeistion betveen systolic and diestolic biood pressure in men. OC.…
For each of the following, indicate the scale of measurement that best describes the infor mation.a. In 2008, Dell Corporation had approximately 78,000 employees.b. USA Today reports that the previous day’s highest temperature in the United States was 105 degrees in Death Valley, California. Source: USA Today, June 19, 2009, p. 12A.c. An individual respondent answers “yes” when asked if TV contributes to violence in the United States.d. In a comparison test of family sedans, a magazine rates the Toyota Camry higher than the VW Passat.
a.In an aquaculture study the following variables were measured on each fish: sex. Initial weight (g), bodytemperature (C), weight gain (g). For each variable indicate the scale of measurement. (b) A weed killer is to be applied at a rate of two ounces per 1000gallons of water (2oz/1000gallons). What is the application rate in ml/1000litrtrs if there are 28.375 ml/oz and 4.5liters/gallon? (c) The term test scores of 15 students enrolled in a Business statistics class were recorded inascending order as follows 4, 7, 7, 9, 10, 11, 13, 15, 15, 15, 17, 17, 19, 19, 20. After calculatingthe mean, median and the mode an error is discovered: one of the 15’s is really a 17. Of the threemeasures of central tendency which will change? (d) A student discovers that his grade on a recent test was the 72 nd percentile. If 90 students wrotethe test, then approximately how many students received a higher grade than he did?
For a population with ? = 100 and ? = 20, what is the X value corresponding to z = 1.50? 30115 101.5130
'collar' measurements: Mid-value (inches) : 12.5 13.0 13.5 30 14.0 14.5 15.0 15,5 16.0 16.5 63 66 29 18 1 1 4 19 No. of students:
6
Question 11
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A sample of blood pressure measurements is taken for a group of adults, and those values (mm Hg) are listed below. The values are matched so that 10 subjects each have a systolic and diastolic measurement. Find the coefficient of variation for each of the two samples; then compare the variation. Systolic 117 128 158 94 158 120 114 138 124 1219 Diastolic 79 77 76 50 88 62 70 80 87 56 The coefficient of variation for the systolic measurements is %. (Type an integer or decimal rounded to one decimal place as needed.)
Which of the following is the tcritical value? 1.895 2.306 1.860 2.364 Which of the following is the calculated tstatistic value? 2.306 2.032 2.084 1.580
List the Level of Measurement for each of the following Nominal: Ordinal: Interval: Ratio:
Two varieties of corn are grown in 4 different locations. Each location provides a value in pounds for each variety.The table below lists the results. Find the standard error for the difference in the production of the two corn varieties to two decimal places. Variety 1 Variety 2 difference location 1 32.1 34.5 -2.4 location 2 30.6 32.6 -2.0 location 3 33.7 34.6 -0.9 location 4 29.7 31.6 -1.3 mean value 31.53 33.18 -1.65 standard deviation 1.76 1.72 0.68 1.23 0.75 0.34 0.98