what is normal distribution

What is the total area under the normal distribution curve? => 100% or 50% or 99.7% or 1%..

The graph of a normal distribution will be ________. => It has no predictable shape or Skewed left or Skewed right or Symmetric..

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. What is the percentage of families whose expenditure is between $437 and $476? => 7.93% or 82% or 23.47% or 15..

The average price of a computer is $750. If prices of computers are approximately normally distributed with a standard deviation of $75, then what would be the maximum price of 10% of least-expensive computers? => $654 or $754 or $745 or $645..

The scores made by candidates in a certain test are normally distributed with mean 500 and standard deviation 100. What percentage of candidates received scores greater than 700? => 2.28% or 2.82% or 47.72% or 47.27%..

The scores made by candidates in a certain test are normally distributed with mean 500 and standard deviation 100. What percentage of candidates received scores which differ from 500 by more than 150 points? => 43.23% or 13.36% or 43.32% or 6.68%..

What is the area under the normal distribution curve to the right of z = 1.56? => 5.94% or 55.94% or 94.06% or 44.96%..

In the standard normal distribution, what is the value of z for the 73 rd percentile? => 0.73 or 1.1 or 0.23 or 0.613..

When can the normal distribution be used as an approximation to the binomial distribution? => n . p = 5, n . q = 5 or n . p ≤ 5, n . q ≤ 5 or n . p > 5, n . q < 5 or n . p ≥ 5, n . q ≥ 5..

To qualify in a competitive examination, candidates must score in the top 5% in the examination. The test has a mean of 200 and a standard deviation of 20. What is the lowest possible score to qualify? Assume the test scores are normally distributed. => 202.6 or 200 or..