Solve the problem.The amount of time workers spend commuting to their jobs each day in a large metropolitan city has a mean of 70 minutes and a standard deviation of 20 minutes. Assuming nothing is known about the shape of the distribution of commuting times, what percentage of these commuting times are between 30 and 110 minutes?

Solve the problem.An usher records the number of unoccupied seats in a movie theater during each viewing of a film. Identify the type of data collected.

The pie chart shows the percentage of votes received by each candidate in the student council presidential election. Use the pie chart to answer the question.Who got the most votes?

Solve the problem.The pie chart shows the classifications of students in a statistics class.What percentage of the class consists of freshman, sophomores, or juniors?

Solve the problem.A realtor is analyzing recent sale prices of 3 bedroom homes in her area. The mean sale prices of recent sales was $320 ,000 with a standard deviation of $40,000. Assuming no information concerning the shape of the distribution is known, what percentage of homes sold between $200,000 and $440,000?

Solve the problem.A realtor is analyzing recent sale prices of 3 bedroom homes in her area. The mean sale prices of recent sales was $310 ,000 with a standard deviation of $20,000. Assuming no information concerning the shape of the distribution is known, what percentage of homes sold between $270,000 and $350,000?

Solve the problem.Because of the possible legal consequences, many people in a sample of the U.S. population chose not to participate in a survey regarding illegal drug use. What type of problem has occurred?

Solve the problem.A study was designed to investigate the effects of two variables — (1) a student’s level of mathematical anxiety and (2) teaching method — on a student’s achievement in a mathematics course. Students who had a low level of mathematical anxiety were taught using the traditional expository method. These students obtained a mean score of 300 with a standard deviation of 40 on a standardized test. Assuming a mound-shaped and symmetric distribution, in what range would approximately 68% of the students score?

Solve the problem.What number is missing from the table? Year inCollege Frequency Relative Frequency Freshman 600 0.30 Sophomore 540 0.27 Junior 460 Senior 400 0.20  

The bar graph shows the number of tickets sold each week by the garden club for their annual flower show.During which week was the fewest number of tickets sold?