Here are the ages of 50 pennies, calculaced as AGE = CURRENT VEAR - VEAR ON PENNY. The data have been sorted from smallest to largest. 4444| 44455 5 55666 6778 10 10 10 11 12 13 18 20 20 21 21 21 21 22 23 25 26 29 29 30 38 (a) what is the average age (in yr) of the pennies? (b) What is the median age (in yr) of the pennies? yr (c) Based on the results of parts (a) and (b), how would you describe the age distribution of these 50 pennies? O The median is larger than the mean; therefore the distribution is skewed to the right. O The mean is same as the median; therefore the distribution is symmetric. O The mean is larger than the median; therefore the distribution is skewed to the right. O The mean is larger than the median; therefore the distribution is skewed to the left. (d) Draw a bax plot for the data set. HI t to

70 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 0 5 0.0714 5 1 11 0.1571 16 2 11 0.1571 27 3 7 0.1 34 4 7 0.1 41 5 7 0.1 48 6 8 0.1143   7     70 a.  Complete the table (Use 4 decimal places when applicable) b.  What is the cumulative relative frequency for flossing 2 times per week? %

For these data set:  390, 460, 650, 710, 760, 780, 800, 830, 860, 890, 910, 950, 970, 1040, 1090, 1090, 1130, 1150, 1170, 1240, 1290, 1370, 1470, 1500, 1520, 1580, 1720, 2140 What is the (most likely) discrete unit for this data set? What is the span of the range? Using this value, if the goal is to have 10 classes, what is the nicest class width?

3)The following table shows data for the price of gasolince (per gallon) in various gasstations in a city. Complete the frequency table and anwer the following questions?Round to the nearest tenth of a percent if necessary.Price of Gas FrequencyCumulativeFrequencyRelativeFrequency0.00-0.99 11.00-1.99 12 132.00-2.993.00-3.99 19 594.00-4.99 625.00-5.99 63a.) What percent of the stations have price of gasoline at least $3 per gal? Round to thenearest tenth of a percent if necessary.b.) Find the mean price of gasoline? Round to the nearest cent if necessary.