normal joint distribution

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

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..

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

Write the percentage of the area shaded in the normally distributed curve shown. => 4.7% or 2.35% or 95% or 99.7%..

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..

What formula is used to gain information about a sample mean when the variable is normally distributed or when the sample size is 30 or more? => z = X - μ σ or z = X ‾ - μ σ n or z = X ‾ - μ σ n or z = X - μ σ..

Jason takes 30 minutes for the newspaper distribution in Taloga. Andrew, who normally takes 60 minutes, assists him. How long would it take for both of them, working together, to distribute the newspapers in Taloga? => 20 minutes or 30 minutes 20 seconds or 30 minutes ..

Which of the following represents a normal (symmetric) distribution curve? I. Graph 1 II. Graph 2 III. Graph 3 => I only or II only or I and II only or II and III only..

The average price of a computer is $750. If prices of computers are approximately normally distributed with a standard deviation of $75, then what is the probability that a randomly selected computer costs more than $1000? => 3.3% or 0.33% or 0.04% or 0.4%..

The scores made by candidates in a certain test are normally distributed with mean 500 and standard deviation 100. What is the percentage of candidates who scored less than 400? => 15.87% or 17.85% or 18.57% or 15.78%..