A study was conducted to investigate whether local car mechanics charge women more than men for a transmission repair. The researcher selected randomly one man and one woman from everyone who had used the same mechanic for the same transmission repair. The process was repeated for a total of seven selected randomly cars. The repair prices and the differences are shown in the table. Car 1 Car 2 Car 3 Car 4 $2,000 Car 5 Car 6 Car 7 $3,000 $1,950 $2,250 $3,550 $3,200 $1,850 $3,285 $3,100 $1,975 $2,150 $2,850 $1,750 $2,175 Difference $265 $100 -$125 -$150 $150 $200 $75 Women Men Mean Standard Deviation Women $2,542.86 $691.27 $2,469.29 $599.77 Difference $73.57 $157.37 Men Dotplots of the data and the differences are shown. 1,700 1,900 2,100 2,300 2,500 2,700 2,900 3,100 3,300 3,500 3,700 1,700 1,900 2,100 2,300 -200 -150 -100 -50 Women 0 Men 2,500 2,700 2,900 3,100 3,300 3,500 Difference 50 ● 100 150 200 250 300 Do the data provide convincing statistical evidence that women pay more than men for the same transmission repair?

The following table represents the survey conducted in a school.   Male female Chicken fried steak 26 16 Chicken nugget 17 25 What percent of students like to have chicken nugget?

A movie club surveyed  250  high school students. The students were asked how often they go to the movies and whether they prefer action movies or dramas. Their responses are summarized in the following table.     Twice a monthor less Three times a monthor more Action 85 20 Drama 90 55   (a) What percentage of the students go to the movies twice a month or less? (b) What percentage of the students prefer action movies ?

Students in a small statistics class were asked which was their dominant hand and if they were in a STEM (science, technology, engineering, and math) major. Their results are listed below. Round to 4 decimal places.   Right Left Total STEM, Yes 6 1 7 STEM, No 7 2 9 Total 13 3 16 ​​   a. What is the proportion of students in the class that are right handed?   b. What is the proportion of left handed students in the class that are in STEM?

In a statistics activity, students are asked to spin a penny and a dime and determine the proportion of times that each lands with tails up. The students believe that since a dime is lighter, it will have a lower proportion of times landing tails up compared to the penny. The students are instructed to spin the penny and the dime 30 times and record the number of times each lands tails up. For one student, the penny lands tails side up 18 times, and the dime lands tails side up 20 times. Let PD = the true proportion of times a dime will land tails up and pp = the true proportion of times a penny will land tails up. Which of the following is the correct standardized test statistic and P-value for the hypotheses, Ho: Po-Pp= 0 and H₂: Po-Pp<0?

A study investigated whether price affects people's judgment. Twenty people each tasted six cabernet sauvignon wines and rated how they liked them on a scale of 1 to 6. Prior to tasting each wine, participants were told the price of the wine. Of the six wines tasted, two were actually the same wine, but for one tasting the participant was told that the wine cost $10 per bottle and for the other tasting the participant was told that the wine cost $90 per bottle. The participants were randomly assigned either to taste the $90 wine first and the $10 wine second, or the $10 wine first and the $90 wine second. Differences were calculated by subtracting the rating for the tasting in which the participant thought the wine cost $10 from the rating for the tasting in which the participant thought the wine cost $90. Difference ($90 3 4 $10) 2 1 USE SALT 0 3 0 2 1 3 3 1 4 1 2 Find the test statistic. (Round your answer to two decimal places.) t = 2 1 -1 Carry out a hypothesis test to determine if…

A study of 552 first-year college students asked about their preferences for online resources. One question asked them to pick their favorite. Here are the results in a pie chart. Pie Chart for the Online Resource Wikipedia 9% Libriary 14% Other Google 74% Select correct answer(s). This is a multiple-answer question. It may have more than one correct answers. i. The percentage in the pie chart shows the percent for each category of a qualitative or a categorical variable. ii. Google is the favorite for about three-quarters of the students. iii. More than 85% of the students are in favor of using either Google or library. iv. Less than 20% of the students are in favor of using either library or Wikipedia.

The owners of an amusement park count the number of adults and children who attend the park on a Friday and Saturday. The completed table is shown below.    Friday Saturday Total Adults 245 371 616 Children 154 277 431 Total 399 648 1,047 How does the joint frequency for the number of adults who attended the amusement park on Friday compare to the joint frequency for the number of children who attended the amusement park on Saturday?     The joint frequency for the number of adults who attended the amusement park on Friday is 399, which is less than the joint frequency for the number of children who attended the amusement park on Saturday, 431. The joint frequency for the number of adults who attended the amusement park on Friday is 154, which is less than the joint frequency for the number of children who attended the amusement park on Saturday, 277. The joint frequency for the number of adults who attended the amusement park on Friday is 371, which is…

A city official would like to know if there is public support for increasing funding for arts programs. To collect data, the city official stands outside a concert hall after a show and surveys every 25th person to exit and asks their opinion about raising funds for the arts. Which of the following describes the population in this scenario? all residents of the city the members of the city council all city residents who support the arts the people surveyed by the city official

c) A major baseball league season came to an abrupt end in the middle of sporting season in 1999. In a poll of 600 adults, 174 blamed the players for the strike, 204 blamed the owners and the rest held various other opinions. Estimate the difference between the proportion of adults who blame players for the strike and the proportion of adults who blame the owners and interpret what the difference implies. What percent the adults have varying opinions on the strike.