standard normal distribution table

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..

The life expectancy (years) at birth of a random sample of 20 countries is shown here. Find the 99% confidence interval for the standard deviation. Assume that the variable is normally distributed. 77 67 76 69 60 57 59 55 57 53 54 50 51 49 50 49 72 69 50 48 => between 6.65 ..

The average rate of reading (words per minute) of a random sample of 16 people after attending a program for two weeks are as shown. The standard deviation of the average rate of reading of people is 30 words per minute. Find the chi-square test value. At α = 0.05, is there enough e..

Find the highest control limit for a normally distributed curve with a mean of 20 and a standard deviation of 3. => 23 or 29 or 11 or 26..

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

The sales in dollars of a new store for a random sample of 10 days in a month are as follows. 450 600 540 650 480 520 680 590 610 550 At α = 0.01, is there enough evidence for the merchandiser to conclude that the standard deviation of the sales per day is more than $60? What is the..

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..

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 of 500 and standard deviation of 100. What percentage of candidates received scores between 400 and 700? => 88.15% or 81.85% or 88.51% or 85.81%..

In an aptitude test conducted to qualify for a job, the scores given were normally distributed with a mean of 75 and a standard deviation 8. If only top 15% were to be selected, then find the cut - off scores. => 83.8 or 88.3 or 83.3 or 85..