2. Every road has one at some point-construction zones that have much lower speed limits.To see if drivers obey these lower speed limits, a police officer used a radar gun tomeasure the speed (in miles per hour, or mph) of a random sample of 10 drivers in a 25 mphconstruction zone. Here are the results:21 30 30 29 25 27 34(a) Can we conclude that the average speed of drivers in this construction zone is greaterthan the posted 25 mph speed limit?Hypotheses:Conditions:Mechanics:Conclusion:2733 32(b) Given your conclusion in part (a), which kind of mistake-a Type I or a Type II error-could you have made? Explain what this mistake means in this context.

The given sample observation of the speed of drivers (in mph) is: 27 33 32 21 30 30 29 25 27 34…

Answered: 2. Every road has one at some…

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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1. Identify a1 of this data: 1, 2, 3, 4,4, 5 ,6, 6 ,7,8,9, 1o. A. 3 C. 4 B. 3.25 D. 4. 25 9. Vhat is the mean of this data? 3x10, 4x105 , 5x1of GXI05, 7x105. A. 3,5 X10 C 6.5 X105 B. 4x105 D. 7 X105 10. f x is the qverage of 2 & 3, y is the average of x *2, z is the qverage of x 95, find +the average of x,y & z. A. 9. 375 4. 6875 В. 3. 125 0. 3.75
You may need to use the appropriate technology to answer this question. Forty-minute workouts of one of the following activities three days a week will lead to a loss of weight. Suppose the following sample data show the number of calories burned during 40-minute workouts for three different activities. Swimming Tennis Cycling 413 410 385 380 485 255 425 455 295 400 420 397 422 525 273 Do these data indicate differences in the amount of calories burned for the three activities? Use a 0.05 level of significance. State the null and alternative hypotheses. O H,: Median, = Median, = Medianc H: Mediang + Median, + Median. O H.: All populations of calories burned are identical. H: Not all populations of calories burned are identical. O Ho: Mediang = Median, = Medianc H: Mediang Median. O H,: Not all populations of calories burned are identical. H: All populations of calories burned are identical. O Ho: Mediang + Median, + Medianc H: Mediang = Median, = Median. Find the value of the test…
2. This is a sample of 10 random seasons in the National Hockey League, Wayne Gretzky scored 50% more points than anyone who ever played professional hockey. He accomplished this amazing feat while playing in 280 fewer games than Gordie Howe, the previous record holder. Here are the number of games Gretzky played during each season. 45 70 73 73 74 78 79 80 80 82 e. What is the shape of the data?f. What is the best measure of center and spread to use for this data set
Express the alternative hypothesis in symbolic form. A psychologist claims that the mean amount of time (in hours) that females spend in talk therapy is more than that of men. Assume that two samples are independent. Let the female talk therapy times be the first population and the male talk therapy times be the second population.
A test is being designed to compare the wearing quality of two brands of tires, say brand A and brand B. Six automobiles will be selected and equipped with the new tires from both brands and driven under normal conditions for 1 month. A measurement will be taken to determine how much wear took place on a scale from 0 to 200. Below is a table of the paired data collected from the 6 cars in the test. [BrandA BrandB] 125 64 64 65 94 103 38 37 90 102 106 115 Conduct a hypothesis test to determine whether the mean of the difference population is 0 at a significance level of a =. State your conclusion.
5t. A magazine reports that women trust recommendations from a particular social networking site more than recommendations from any other social network platform. But does trust in this social networking site differ by gender? The following sample data show the number of women and men who stated in a recent sample that they trust recommendations made on this particular social networking site. Women Men Sample 150 170 Trust RecommendationsMade on the social networking site 111 102 (a) What is the point estimate of the proportion of women who trust recommendations made on this particular social networking site? (b) What is the point estimate of the proportion of men who trust recommendations made on this particular social networking site? (c) Provide a 95% confidence interval estimate of the difference between the proportion of women and men who trust recommendations made on this particular social networking site. (Round your answers to four decimal places.)
1. A researcher wishes to determine if the following distances (in meters) traveled by a random sample of ten world-class long jumpers are highly affected by the speed (in meters per second) at takeoff. The distances recorded from the sample long jumpers are as follows: 7.67, 8.22, 7.94, 7.16, 8.08, 7.35, 7.89, 7.76, 7.25, and 7.43. On the other hand, the speeds are recorded as follows: 8.9, 9.2, 8.1, 8.6, 9.0, 8.4, 8.8, 9.1, 8.0, and 8.2. What will be the distance, assuming that the speed is 9.4 meters per second? Round your answer to two decimal places. There is no need to place the unit. 2. A certain regression line equation has the slope equal to 720.25 and an intercept that is equal to -182.4. What will be the predicted score for the dependent variable if the independent variable is 281.5? Round your answers to two decimal places. Do not place any unit.
1. A dog groomer is often asked if small dogs bark more than larger dogs. To test this, he logs the number of separate barking episodes per day for three size dogs: small, medium, and large. In a separate file you will find the number of barking episodes for 12 dogs. On average, small dogs barked the most Mean: 7.25 On average, medium sized dogs barked the least Mean: 2.75 A. Do the different size dogs bark a significantly different number of times? Test with an α = 0.05. B. If appropriate, use Tukey’s HSD post hoc test and report where the differences are. If inappropriate, state why. C. Calculate and interpret the effect size.
Are these answers correct?
A random sample of ten observations was drawn from a normally distributed population. The data ues wore 6, 4, 4. 7, 5, 5, 4, 5. 6 and 4. A person tested the hypothesis Ha #26 versus As6 and scribbled down his calculations. When his friend came along and quickly wanted copy his work, he did not read properly and wrote down the following 1. The sample mean is equal to 4. 2. The sample variance is equal to 1 3 The rejection region is < tnon 10=-1.833. 4 The test statistic is 3.0. 5 The conclusion is to reject H because the test statistic I-30<-L833 Which ONE of the above statements is CORRECT
D5)

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