8.104 Gas mileage of the Honda Civic. According to the Environmental Protection Agency (EPA) Fuel Economy Guide, the 2014 Honda Civic automobile obtains a mean of 36 miles per gallon (mpg) on the highway. Suppose Honda claims that the EPA has underestimated the Civic's mile- age. To support its assertion, the company selects n = 50 model 2014 Civic cars and records the mileage obtained for each car over a driving course similar to the one used by the EPA. The following data result: x = 38.3 mpg, s = 6.4 mpg. a. If Honda wishes to show that the mean mpg for 2014 Civic autos is greater than 36 mpg, what should the al- ternative hypothesis be? the null hypothesis? b. Do the data provide sufficient evidence to support the auto manufacturer's claim? Test, using a = .05. List any assumptions you make in conducting the test. c. Calculate the power of the test for the mean values of 36.5, 37.0, 37.5, 38.0, and 38.5, assuming that s = 6.4 is a good estimate of o.

In a study of the effects of the drug THC on driving performance, driving performance would be the Independent variable. a. true b. false

Use the following cell phone airport data speeds​ (Mbps) from a particular network. Find the percentile corresponding to the data speed 0.9 Mbps.   0.2 0.2 0.3 0.4 0.4 0.6 0.6 0.7 0.7 0.7   0.8 0.8 0.9 0.9 0.9 0.9 1.2 1.3 1.8 1.9 1.9 2.3 2.3 2.4 2.4 2.9 3.1 3.3 3.9 4.6 4.7 5.2 5.3 5.6 6.3 7.1 7.1 7.7 8.3 8.4 8.8 9.6 9.8 9.9 13.4 13.8 13.9 14.4 15.7

Use the following cell phone airport data speeds​ (Mbps) from a particular network. Find the percentile corresponding to the data speed 9.6 Mbps.   0.1 0.1 0.2 0.2 0.3 0.4 0.4 0.4 0.5 0.5   0.5 0.5 0.7 0.8 0.8 0.9 0.9 1.2 1.2 1.3 1.5 1.5 1.8 2.1 2.2 2.4 2.4 2.7 3.7 3.8 3.9 4.8 5.1 5.5 6.2 6.2 6.3 7.7 8.8 9.3 9.3 9.6 9.8 11.8 13.9 14.1 14.7 15.5 15.7 28.3

Use the following cell phone airport data speeds (Mbps) from a particular network. Find the percentile corresponding to the data speed 0.9 Mbps. 0.6 0.6 0.7 0.7 D 0.5 0.5 0.6 0.2 0.4 0.5 1.4 1.5 1.6 0.9 1.2 1.4 0.7 0.9 0.9 2.8 3.2 0.7 2.5 2.5 2.6 1.9 2.2 2.3 8.8 1.6 1.7 8.2 8.2 8.3 5.7 6.6 6.7 3.6 3.7 4.9 15.3 15.5 30.6 14.8 15.1 15.3 11.9 14.5 8.9 9.1 ..... Percentile of 0.9 = (Round to the nearest whole number as needed.) Next MacBook DII DD F12 F11 F10 F9 000 000 F8 F7 F5 F6 F4 esc F3 F1 @ # $ del 7 2 4 { } E R T Y U Q W tab G H J K L F A + II * 00

Researchers examined the influence of a television program on children's aggressiveness. The number of aggressive responses was measured during an observation period after viewing the television program. Imagine that the known national average for number of aggressive responses typically performed by children who do not watch television is 6.847. Use the data below to conduct an analysis to determine if the number of aggressive responses on average is different from the national average. The data for this study can be found below, answer questions based on data. What is the null and alternative hypotheses in words and symbols? Is the assumption(s) met? Please explain your answer and proceed with the analysis even if the assumption(s) is not met.    What do you conclude from your analysis?   Based on your response in “c” above, identify and explain the type of error you could be making.   responses 9 4 11 12 14 7 12 10 11 8 14 12 8 12 7 10 10 9 5…

Arsenic is toxic to humans and people can be exposed to it through contaminated drinking water, food, dust, and soil. Scientists have devised a non-invasive way to measure a person's level of arsenic poisoning: by examining toenail clippings. In a recent study, scientists measure the level of arsenic (in mg/kg) in toenail clippings of 8 people who lived near a former arsenic mine in Great Britain. The following levels are recorded. 0.8, 1.9, 2.7, 3.4, 3.9, 7.1, 11.9, 26.0 Below are the summary statistics of the data. min Q1 median Q3 max sd n mean 0.8 2.5 3.65 8.3 26 7.2125 8.368041 8 Suppose the 8 people examined were randomly sampled from residents near the former arsenic mine. Is it legitimate to construct a 95% confidence interval for the mean level of arsenic (in mg/kg) in toenail clippings for residents near the former arsenic mine using a t-distribution? Explain briefly.

The authors of a paper were interested in how the distance a deer mouse will travel for food is related to the distance from the food to the nearest pile of debris. Distances were measured in meters. The data and computer output are given below. Distance from Debris Distance Traveled 6.94 0.00 5.23 6.13 5.21 11.29 7.10 14.35 8.16 12.03 5.50 22.72 9.19 20.11 9.05 26.16 9.36 30.65 Simple Linear Regression Results:  Dependent Variable: Traveled Independent Variable: Debris Sample size: 9 R (correlation coefficient) = 0.5657 R-sq = 0.32002088 Estimate of error standard deviation 8.670711 Parameter estimates:  Parameter Estimate Std. Err.  Alternative DF T-Stat P-Value Intercept -7.6854587 13.332196 ≠ 0 7 -0.5764586 0.5824 Slope 3.2340908 1.7818117 ≠ 0 7 1.8150575 0.1124 a)What is the least squares regression line for the output given above? b) what is the predicted traveled distance given the distance from debris is 6.5 meters?

A physical therapist wanted to know whether the mean step pulse of men was less than the mean step pulse of women. She randomly selected 59 men and 73 women to participate in the study. Each subject was required to step up and down a 6-inch platform. The pulse of each subject was then recorded. The following results were obtained. SE Mean 1.5 1.7 SIDev 11.2 Mean 112.7 Men Women 99% CI for mu Men - mu Women -11.89, 0.09) T-Test mu Men mu Women (vs<) T= -2.61 P=0.0051 DF 129 59 73 118.6 14.8 Two sample T for Men vs Women State the researcher's condlusion. Which of the following is correct? O A Reject Ha, there is sufficient evidence to condlude that the mean step pulse of men was less than the mean step pulse of women the mean step pulse of women O B. Reject Ha, there is not sufficient evidence to condlude that the mean step pulse of men was less OC. Fail to reject Ho, there is sufficient evidence to conclude that the mean step pulse of men was less than the mean steg pulse of women O D.…

Suppose you are interested in the population of all college students in the US and that you collect data from all students from FIT. Is the following a parameter or statistic?  The proportion of your school's students who are Business Majors     a. parameter     b. statistic