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5. If 8% of all the people in a certain age group are not working, find the probability, in a sample of 200people, that fewer than 10 people are not working. 6. The average number of cups of coffee sold at a 7-11 store between the hours of 8 a.m. and 8:30 a.m. is 20. With a standard deviation of 3, and assuming the variable is normally distributed, what is the probability that during this same time period, there will be sold; A. Between 20 and 25 cups B. More than 21 cups C. Between 26 and 28 cups D. Less than 21 cups

1. Find the area under the Standard Normal Distribution for each: A. Between 0 and 1.50 C. Between 1.56 and 1.96 B. To the right of z = 1.75 D. To the left of z = -2.12 2. Using the Standard Normal Distribution, find the probability of: A. P(O<z<2.16) C. P(z>1.77) B. P(-1.63<z<2.17). D. P(z<-2.37) 3. The average electric bill in a residential area is $72 for the month of April. The standard Deviation is $6. If the amounts are normally distributed, find the probability that the mean of the bills of 15 residents will be less than $75. Fill-in: .SD = Now find the Prob. u= n = X = 4. The average height of a certain age group is 53". The Standard Deviation is 4“. If the variable is normally distributed, find the probability that a selected individuals height will be: a.greater than 59". b. less than 45 c. between 50 & 55 Fill-in: U= U= U= S.D.= S.D.= S.D.= X= X = X =