Continue from the previous question: Two major automobile manufacturers haveproduced compact cars with engines of the same size. We are interested indetermining whether or not there is a significant difference in the mean MPG (milesper gallon) when testing for the fuel efficiency of these two brands of automobiles.The test statistic is3.4652.6163.9062.096 Driver123456789101112131415161718192021222324252627282930Manufacturer A Manufacturer B322827222627262425242925312825272822272424252827252822272424252827252830242533222825252027262625293125322726262529312530

There are two major automobile manufacturers have produced compact cars with engines of the same…

Answered: Continue from the previous question:…

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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For each problem, you must state the hypotheses, calculate the test statistic, and explain your decision. A sample of 25 cities have been classified as high or low on their homicide rates and on the number of handguns sold within the city limits: a. The table is constructed assuming that homicide rate is the independent variable. Please add %s in the appropriate position (columns or rows) to describe the pattern of the relationship. b. Is there a statistically significant relationship between these variables?
After the detonation of a 20-kiloton nuclear bomb in China, scientists in Japan and the U.S. conducted tests to measure the radiation. The results are as follows; JAPAN .2 .4 .5 .1 .3 .3 U.S. .2 .3 .1 .1 .2 .2 4 .1 A. At a level of significance 0.10 decide whether fallout in Japan was significantly greater than fallout in the S. Also give the means and standard deviations for the two samples. State hypotheses, P-value and conclusion. B. Find a 80% confidence interval for these results. What does it seem to indicate?
Which chi-square test should be used on the following study?A psychotherapist wanted to see what percentages that patients sought after four different kinds of therapy consisting of play, dance, music and group therapy. a.goodness of fit b.test of independence
Explain the meaning of the following percentiles in parts (a) and (b). (a) The 5th percentile of the weight of males 36 months of age in a certain city is 12.0 kg. (b) The 95th percentile of the length of newborn females in a certain city is 53.8 cm.
A magazine used the summated rating of 10 restaurants to predict the cost of a restaurant meal. For that data, SSR = 133,295.11 and SST = 140,966.67. Complete parts (a) through (c). a. Determine the coefficient of determination, r², and interpret its meaning. 2²=(Round to four decimal places as needed.)
A college administrator wants to know if there is a significant difference between sexual orientation and level of family support for students at their college. The administrator takes a random sample of students who identify as gay/lesbian, bisexual or heterosexual/straight. There were 22 students sampled in each category. A measure of family support is given with higher scores indicating more family support. The means are as follows: Gay/lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22 Source SS df MS F Orientation 300 Error 2961 Total What is the value of the F-statistic?
The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is different if the sex offender is also a drug addict. Of the 321 convicted sex offenders who were also drug addicts, 22 of them became repeat offenders. What can be concluded at the a = 0.01 level of significance?
A study was done to assess the ash content in peat moss used for textile fiber. High ash content affects the quality of the textile. The following data are measurements of the percentage of ash by weight. 0.5 1.8 4.0 1.0 2.0 1.1 1.6 2.3 3.5 2.2 2.0 3.8 3.0 2.3 1.8 3.6 2.4 0.8 3.4 1.4 1.9 2.3 1.2 1.9 2.3 2.6 3.1 2.5 1.7 5.0 1.3 3.0 2.7 1.2 1.5 3.2 2.4 2.5 1.9 3.1 2.4 2.8 2.7 4.5 2.1 1.5 0.7 3.7 1.8 1.7 We know that the data are somewhat skewed. Does this affect the accuracy of the conclusions in 99% confidence interval and hypothesis that the mean is less than 2.70(α = 0.01)? Hint: think about the sample size.
Is the amount of sodium (in milligrams) in brand-name cereals the same as the amount of sodium in generic cereals? The sodium content in milligrams from a random sample of some brand-name cereals is given in the table below. Brand-Name: x=139.92 , s=61.24 , n=21 Generic: x=154.33 , s=73.87 , n=24 Is there a difference between the sodium content in generic and brand-name cereals? Use a significance level of 0.10. hypothesis test is needed
A county environmental agency suspects that the fish in a particular polluted lake have elevated mercury levels. To confirm that suspicion, five striped basses in that lake were caught and their tissues were tested for mercury. For the purpose of comparison, four striped basses in an unpolluted lake were also caught and tested. The fish tissue mercury levels in mg/kg are given below. Sample I(From Polluted Lake) 0.523 0.723 0.523 0.623 0.523 Sample II(From Unpolluted Lake) 0.323 0.223 0.523 0.323 0.000 (a) Construct the 95% confidence interval for the difference in the population means based on these data. (b) Test, at the 5% level of significance, whether the data provide sufficient evidence to conclude that fish in the polluted lake have elevated levels of mercury in their tissue.
Given SST = 2415, SSE = 1725, n = 7, and k = 2, calculate the value of the overall F test statistic. O Feal = 3.50 O Fcal = 1.25 O Fcal = 0.40 O Fcal = 0.80
A research study examined the cholesterol levels in two groups (control vs. salmon consumption group) to see whether consuming more salmon in the diet would make a difference on cholesterol levels. The mean cholesterol level of the 60 people in the control group was 240 with a SD of 20. The mean cholesterol level of the 60 people in the salmon consumption group was 210 with a SD of 21. Calculate the z or t test statistic

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