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Earn +20 ptsQ: The average amount customers at a certain grocery store spend yearly is 636.55 Assume the variable is normally distributed If the standard deviation is 89.46 find the probability that a randomly?
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A particular fruit's weights are normally distributed, with a mean of 298 grams and a standard deviation of 13 grams.If you pick one fruit at random, what is the probability that it will weigh between 262 grams and 269 grams?
A particular fruit's weights are normally distributed, with a mean of 760 grams and a standard deviation of 15 grams. If you pick one fruit at random, what is the probability that it will weigh between 722 grams and 746 grams-----A particular fruit's weights are normally distributed, with a mean of 567 grams and a standard deviation of 25 grams.
The life of an electronic transistor is normally distributed with a mean of 500 hours and a standard deviation of 80 hours determine the probability that a transistor will last for more than 400 hours?
z score = (400-500)/80=-1.25 probability under curve to right of -1.25 = .8944
The average weekly grocery bill is 57.85 with a standard deviation of 14.25 What is the lowest amount spent by the upper 25 percent of market customers?
If you assume that a grocery bill is normally distributed then the lowest spend by the top 25% is 67.46.
What percentage of the normally distributed population lies within the plus or minus one standard deviation of the population mean?
68.2%
What is the probability that a randomly selected case from a normally distributed distribution will have a score between -1.00 and the mean?
The answer is 0.1586
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