20. In a survey of the number of passengers on a car, a field worker recorded the data. Due to the carelessness, 2 of the number in the table are unreadable because of the blotch of the ink. They are represented by x and y. TT No. of passengers No. of cars 1 12 2 18 3 4 y 5 11 According to the summarized data, the mean of the number of passengers is 2.75 and the standard deviation is 1.475, find the value of x and y.

If the mean snowfall for Ottawa Ontario Canada is 98 inches per year and the standard deviation is 25 inches what percentage of the time does Ottawa receive less than 125 inches of snow?

Suppose that you have a set of data that has a mean of 34 and a standard deviation of 6. a) Is the point 28 above, below, or the same as the mean. How many standard deviations is 28 from the mean. b) Is the point 46 above, below, or the same as the mean. How many standard deviations is 46 from the mean. c) Is the point 43 above, below, or the same as the mean. How many standard deviations is 43 from the mean. d) Is the point 20 above, below, or the same as the mean. How many standard deviations is 20 from the mean.

If the mean of the data is 130 with a standard deviation of 10, what percent of the data falls between the values of 100 and 160?