Homework Answers
Here the test statistic is the number of positive signs after
subtracting 35 from all the observations. It is same as the number
of observations greater than 35 in the given data. So the answer
is
S = 6
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Nine SmartCars were randomly selected and the highway mileage of each was noted. The highway mileage...
Problem 5. The mileage of a certain make of car may not be exactly that rated by the manufacturer. Suppose ten cars of the same model were tested for combined city and highway mileages, with the foll...
Problem 5. The mileage of a certain make of car may not be exactly that rated by the manufacturer. Suppose ten cars of the same model were tested for combined city and highway mileages, with the following results: 1 Car No. Observed Mileage 35 40 37 4232 43 38 32 41 34 (mpg) 1 23 4 56 78 9 10 a) Estimate the sample mean and standard deviation of the actual mileage of this particular make of car. Suppose that...
In automobile mileage and gasoline-consumption testing, 13 automobiles were road tested for 300 miles in both...
In automobile mileage and gasoline-consumption testing, 13 automobiles were road tested for 300 miles in both city and highway driving conditions. The following data were recorded for miles-per-gallon performance City Highway 19.320.518.2 18.5 19.1 17.317.1 18.518.921.0 19.3 18.4 18.6 Use the mean, median, and mode to make a statement about the difference in performance for city and highway driving. Compute the mean for the miles-per-gallon performance for city and highway driving. (Round your answers to two decimal places.) city highway...
In automobile mileage and gasoline-consumption testing, 13 automobiles were road tested for 300 miles in both...
In automobile mileage and gasoline-consumption testing, 13 automobiles were road tested for 300 miles in both city and highway driving conditions. The following data were recorded for miles-per-gallon performance. City 16.2 16.7 15.9 14.4 13.2 15.3 16.8 16.0 16.1 15.3 15.2 15.3 16.2 Highway 19.0 20.2 17.9 18.2 18.8 17.0 16.8 18.2 18.6 20.7 19.0 18.1 18.3 Use the mean, median, and mode to make a statement about the difference in performance for city and highway driving. Compute the mean...
We expect a car’s highway gas mileage to be related to its city gas mileage (in...
We expect a car’s highway gas mileage to be related to its city gas mileage (in mpg). Data for all 1209 vehicles in the government’s 2016 Fuel Economy Guide give the regression line highway mpg=7.903+(0.993×city mpg) for predicting highway mileage from city mileage. (a) What is the slope of this line? (Enter your answer rounded to three decimal places.) slope: What does the numerical value of the slope tell you? A) Highway gas mileage increases with city gas mileage by...
To test if the mileage of three different makes of cars is the same, randomly selected...
To test if the mileage of three different makes of cars is the same, randomly selected trips on those makes are recorded and the data is shown below for the miles per gallon of the trips Make 1 Make 2 Make 3 29.9 45.8 34.8 31.1 40.3 41.4 23.5 36.6 40 30.5 29 37.6 35.4 40.3 41.4 33 33 48.1 28.5 35.5 37.2 32.4 34.9 44.1 25.7 31 42 40.3 44.9 Use one way ANOVA to test if the means...
A survey of 25 randomly selected customers found the ages shown (in years) The mean is...
A survey of 25 randomly selected customers found the ages shown (in years) The mean is 32.68 years and the standard deviation is 9 47 years a) How many degrees of freedom does the t-statistic have? b) How many degrees of freedom would the t-statistic have if the sample size had been 400? 25 25 22 38 420 25 26 37 34 39 46 37 24 13 45 20 42 17 48 34 32 35 39 40 32 a) The...
A mileage test is conducted for a new car model, the “Pizzazz.” Thirty (n=30) random selected...
A mileage test is conducted for a new car model, the “Pizzazz.” Thirty (n=30) random selected Pizzazzes are driven for a month and the mileage is carefully measured in each. The mean mileage for the sample is 28.6 miles per gallon (mpg) and the sample standard deviation is 2.2 mpg. H0: µ = 27 H1: µ ≠ 27 What would have to happen in order for you to reject the null hypothesis? A. The test statistic would have to be...
Gas mileage actually varies slightly with the driving speed of a car (as well as with...
Gas mileage actually varies slightly with the driving speed of a car (as well as with highway vs. city driving). Suppose your car averages 31 miles per gallon on the highway if your average speed is 54 miles per hour, and it averages 29 miles per gallon on the highway if your average speed is 69 miles per hour. Answer parts (a) and (b) below. a. What is the driving time for a 3000-mile trip if you drive at an...
To perform a test of the null and alternative hypotheses shown below, random samples were selected...
To perform a test of the null and alternative hypotheses shown below, random samples were selected from the two normally distributed populations with equal variances. The data are shown below. Test the null hypothesis using an alpha level equal to 0.01. Ho: 1-H2 = 0 Sample from Population 1 Sample from Population 2 33 38 27 36 37 32 41 35 38 34 HAL-H270 37 27 34 45 35 39 32 33 38 34 Determine the rejection region for the...
b d snd e only Elementary Jon 25 34 Problem #2 (12 points) The following data...
b d
snd e only
Elementary Jon 25 34 Problem #2 (12 points) The following data set represents the miles per gallon rating for 30 ca 23 21 33 41 32 40 39 20 30 37 21 30 38 191919 26 28 29 35 35 36 32 38 38 (4 pts) a. Obtain the five-number summary for the data. (The five-number summary is: Minimum, Q1, Q2, Q3, and Maximum) (1 pt) b. Use the interquartile range (IQR) rule to identify...
Problem 5. The mileage of a certain make of car may not be exactly that rated by the manufacturer. Suppose ten cars of the same model were tested for combined city and highway mileages, with the following results: 1 Car No. Observed Mileage 35 40 37 4232 43 38 32 41 34 (mpg) 1 23 4 56 78 9 10 a) Estimate the sample mean and standard deviation of the actual mileage of this particular make of car. Suppose that...
In automobile mileage and gasoline-consumption testing, 13 automobiles were road tested for 300 miles in both city and highway driving conditions. The following data were recorded for miles-per-gallon performance City Highway 19.320.518.2 18.5 19.1 17.317.1 18.518.921.0 19.3 18.4 18.6 Use the mean, median, and mode to make a statement about the difference in performance for city and highway driving. Compute the mean for the miles-per-gallon performance for city and highway driving. (Round your answers to two decimal places.) city highway...
A survey of 25 randomly selected customers found the ages shown (in years) The mean is 32.68 years and the standard deviation is 9 47 years a) How many degrees of freedom does the t-statistic have? b) How many degrees of freedom would the t-statistic have if the sample size had been 400? 25 25 22 38 420 25 26 37 34 39 46 37 24 13 45 20 42 17 48 34 32 35 39 40 32 a) The...
Gas mileage actually varies slightly with the driving speed of a car (as well as with highway vs. city driving). Suppose your car averages 31 miles per gallon on the highway if your average speed is 54 miles per hour, and it averages 29 miles per gallon on the highway if your average speed is 69 miles per hour. Answer parts (a) and (b) below. a. What is the driving time for a 3000-mile trip if you drive at an...
To perform a test of the null and alternative hypotheses shown below, random samples were selected from the two normally distributed populations with equal variances. The data are shown below. Test the null hypothesis using an alpha level equal to 0.01. Ho: 1-H2 = 0 Sample from Population 1 Sample from Population 2 33 38 27 36 37 32 41 35 38 34 HAL-H270 37 27 34 45 35 39 32 33 38 34 Determine the rejection region for the...
b d
snd e only
Elementary Jon 25 34 Problem #2 (12 points) The following data set represents the miles per gallon rating for 30 ca 23 21 33 41 32 40 39 20 30 37 21 30 38 191919 26 28 29 35 35 36 32 38 38 (4 pts) a. Obtain the five-number summary for the data. (The five-number summary is: Minimum, Q1, Q2, Q3, and Maximum) (1 pt) b. Use the interquartile range (IQR) rule to identify...
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