Normal Distribution

Question 2 of 11 1 Point The Fresha Tea Company pack tea in bags marked as 250 g A large number of packs of tea were weighed and the mean and standard deviation were calculated as 255 g and 2.5 g respectively. Assuming this data is normally distributed, approximately what percentage of packs are underweight? Select the correct response: 4% 5% 25% 3.5% The ages of the population of a town are Normally distributed with mean 43 and standard deviation 14 The town has a population of 5,000. How many would you expect to be aged between 22 and 57? You can use this Standard Normal Distribution curve: 19.1% 19.1% 15.0% 15.0% 9.2% 0.1 0.5% 9.2% 4.4% 4.4% 0.5% 0.16 1.7%% 1.79 -3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 3 Select the correct response. 3410 O 3870 4330 1750Question 3 of 11 lPoint A machine produces electrical components. 99.7% ofthe components have lengths between 1.176 cm and 1.224 cm. Assuming this data is normally distributed, what are the mean and standard deviation? Select the correct response Mean =1.200 cm 8 D. = 0.004 cm Mean = 1.210 cm 8 D. = 0.008 cm Mean = 1.190 cm 8 D. = 0.008 cm Mean =1.200 cm 8 D. = 0.008 cm Question 4 of 11 1 Point The mean July daily rainfall in Waterville is 10 mm and the standard deviation is 1.5 mm Assume that this data is normally distributed. How many days in July would you expect the daily rainfall to be less than 8.5 mm? Select the correct response: O 7 0 6 0 5 10 Question 9 of 11 1 Point The mean June midday temperature in Desertville is 36'C and the standard deviation is 3"C Assuming this data is normally distributed, how many days in June would you expect the midday temperature to be between 39*C and 42"C? Select the correct response: 14 0 4 O 3 O7