What percent of values fall within 1, 2, and 3, standard deviations from the mean? Answer The shape of the graph will be bell-shaped with the graph falling off evenly on either side of the mean.
William McKinley height is 67in The mean height of presidents from the past century = 71.5 The Standard deviation of presidents from the past century = 2.1 P(Z =(x - µ)/σ)= P(Z =(67 -71.5)/2.1)=P(Z= - 2.1429)=0.4839 d.
534050 Standard Deviation of Sampling Distribution of the Sample Mean Standard Deviation of Sampling Distribution of the Sample Mean Answers (a) µ = 12 , σ = 2.2 , n = 25 (Round your answers of "σ " to 4 decimal places and "σ 2" to 3 decimal places
Given that X is normal with mean µ = 100 and standard deviation σ = 15, Standardizing the variable X using Z = (X - µ)/σ = (X - 100)/15 and from standard normal tables, we have what proportion of the population consisting of geniuses?
Billy scores 5 what is his standard score? Show work. Answer Given that µ = 3.5, σ = 5 Standard score, = 0.3 The solution provides step by step method for the calculation of Z-score. Formula for the calculation is also included.
What is σ , the standard deviation of . b). Give a 95% confidence interval for µ, the mean mpg for this vehicle.
For instance, if a person scored a 70 on a test with a mean of 50 and a standard deviation of 10, then they scored 2 standard deviations above the mean.
450894 Statistics: Within what range would 85% of credit score fall Statistics: Within what range would 85% of credit score fall Standard deviation The credit score of a 35 applying for a mortgage is normally distributed with a mean score of 600 and
Step 3: square each of the deviations, which amplifies large deviations and makes negative values positive. Step 4: find the mean of those squared deviations.
Empirical rule states that for a normal distribution, Nearly all (99.7%) of the values lie within 3 standard deviations of the mean (or between the mean minus 3 times the standard deviation and the mean plus 3 times the standard deviation).