Question

1. The following data represents the number of callories in seven sandwiches 1. at the restaurant: (740, 610, 490, 370, 500, 540, 460). Find the mean absolute deviation. Round your answer to the nearest hundredth. nean 3710 2. The speed in miles per hour of each of Sam's last ten pitches as follows: (82, 78, 83, 80, 75, 82, 79, 80, 83, 81). Find the variance Round your answer to the nearest hundredth. were recorded 2. 3. The following data below represents the running times of six movies. Find 3. the standard deviation of the running times. Give your answer to nearest hundredth of a minute. the Movie Running 1hr1hr2hr1hr2hr3hr Time 47 min 32 min 14 min 56 min 32 min 2 min 4. The gas mileage for a group of cars is normally distributed with a mean of . 24 miles per gallon and a variance of 34.81. What is the standard deviation? Use for questions 5-8: The number of days a group of 250 homes is on the market is normally distributed with a mean 50 and a standard deviation of 13. Label the normal distribution curve, then answer the questions. 5. What percent of the homes are on the market between 11 and 89 days? 5 6. What is the probability that a home is on the market for at least 37 days? 6._ 7. Approximately how many homes were on the market between 37 and 63 7. days? 8. Approximately how many homes were on the market for no more than 24 8. days? O Gina Wilson

Answer 1

1)

	X	|X-mean|
	740	210
	610	80
	490	40
	370	160
	500	30
	540	10
	460	70
total	3710	600

mean = ΣX/n = 3710/7 = 530

mean absolute deviation = |x-mean|/n = 600/7=   85.71