Monthly expenditures for a family of four in a city averages $450, wit..
Monthly expenditures for a family of four in a city averages $450, with a standard deviation of $65. Assume the monthly expenditures are normally distributed. Find the probability that a family whose expenditure will be between $385 and $515. => 0.3413 or 0.6826 or 0.3..
The average price of a bicycle is $300. The prices of the bicycles are..
The average price of a bicycle is $300. The prices of the bicycles are normally distributed with a standard deviation of $60. What is the probability that a randomly selected bicycle costs more than $450? => 0.62% or 6.2% or 3.8% or 0.38%..
Let X denote the number of scores on a test. If X is normally distribu..
Let X denote the number of scores on a test. If X is normally distributed with a mean of 90 and a standard deviation of 10, find the probability that X is not less than 70. => 0.4772 or 0.7472 or 0.7972 or 0.9772..
A truck was loaded with sacks of onions whose weights were normally di..
A truck was loaded with sacks of onions whose weights were normally distributed with a mean of 35 lb and a standard deviation of 2 lb. What is the probability that a sack of onions will weigh more than 37 lb? => 0.1857 or 0.3143 or 0.1587 or 0.3413..
The average protein content in different types of nuts is 20 g, and th..
The average protein content in different types of nuts is 20 g, and the standard deviation is 5 g. Assume the variable is normally distributed. If a sample of 16 nuts are selected, then find the probability that the mean of the sample will be greater than 22 g. => 65.5..
The heights of a group of young women aged 16 - 25 years was found to ..
The heights of a group of young women aged 16 - 25 years was found to be normally distributed with a mean of 62.4 inches and a standard deviation of 1.5 inches. Find the probability of a woman having a height between 60 inches and 65 inches, using the standard nor..
The average age of media reporters worldwide is 35 years with a standa..
The average age of media reporters worldwide is 35 years with a standard deviation of 6 years. If a media channel employs 50 media reporters, then what is the probability that their mean age is above 38 years? Assume that the variable is normally distributed. => 0.1% o..
The average age of media reporters worldwide is 35 years with a standa..
The average age of media reporters worldwide is 35 years with a standard deviation of 6 years. If a media channel employs 50 media reporters, then what is the probability that their mean age lies between 34 and 37 years? Assume that the variable is normally distributed..
The average number of hours a vehicle is in the parking lot of the com..
The average number of hours a vehicle is in the parking lot of the company is 8. Assume the variable is normally distributed and the standard deviation is 2 hours. If 10 vehicles are selected at random, then find the probability that the mean number of hours they are k..
The graph of a normal distribution will be ________.
The graph of a normal distribution will be ________. => It has no predictable shape or Skewed left or Skewed right or Symmetric..
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