Ch. 6.1 #7-49 odd
Ch. 6.1 #7-49 odd
Ch. 6.1 #7-49 odd
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Pz ( 0.90) 1 0.8159 0.1841 18.41%<br />
c) Why is the probability for part a greater than that for part b?<br />
Because the individual values are more variable than means.<br />
17. Water Use The Old Farmer’s Almanac reports that the average person uses 123 gallons of water<br />
daily. If the standard deviation is 21 gallons, find the probability that the mean of a randomly selected<br />
sample of 15 people will be between 120 and 126 gallons. Assume the variable is normally distributed.<br />
µ=123, n=15, σ= 21, normally distributed<br />
P(120< x
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