Normal Probabilities – Using Z Score
Restaurant Hours Preference Survey
July 9, 2019Markov Chain
July 9, 2019A normal distributionhas a meanof u= 40 and o=10. if a vertical line is drawn through the distribution at x= 55, what proportion of the scores on the right side of the line?
A normal distribution has a u= 80 and o= 10. what is the probabilityof randomly selecting a score greater than 90 from this distribution?
A normal distribution has a mean of u= 100 and o= 20. if one score is randomly selected from the probability that the score will be less than x= 84?
A normal distribution has a mean of u= 40 and o=10. If a vertical line is drawn through the distribution at x= 55, what proportion of the scores on the right side of the line?
Answer
We need P (X > 55)
P (X > 55) = = P (Z > 1.5) …
The solution provides step by step method for the calculation of probability using the Z score. The normally distribution has mean of u=100 and o=20. The expert determines if the probability of randomly selecting a score is greater than 90 from the distribution. The expert also determines if one score is randomly selected from the probability that the score will be less than x=84.
