Introduction to Normal Distribution and Standard Normal Distribution
x=number of languages in which a person is fluent. According to statistics in Canada, for residents of Canada this has probability distribution p(0)=.02 p(1)=.81 p(2)=.17. Find mean.
What is 1.15
Use the standard normal table to find the z-score that corresponds to the given cumulative are or precentile 0.94
What is 1.555
What is a probability distribution of a statistic obtained through a large number of samples drawn from a specific population?
What is Sampling Distribution
World Health Organization study of health in various countries reported that in Canada, systolic blood pressure readings have a mean of 121 & std. dev. of 16. High blood pressure is a reading above 140. What is the z-score?
What is 1.19
Find the z-score that contains 0.754 cumulative area between z and -z
What is z = 1.16
What is a statistical measure that quantifies the distance (measured in standard deviations) a data point is from the mean of a data set?
What is z-score
In 1999, the murder rates (per 100,000 residents) for the 50 states and D.C. had a mean of 5.9 and std. dev. of 6.3. D.C. had a murder rate pf 46.4. Find the z-score.
What is 6.43
Find the z-score that has 11.9% of the distributions are to its right.
What is 1.18
What is the standard deviation of the sampling distribution of a statistic.
What is standard error of mean
Find the indicated area under the standard normal curve between z=-1.96 and z=1.96
What is 0.95
In 1999, the murder rates (per 100,000 residents) for the 50 states and D.C. had a mean of 5.9 and std. dev. of 6.3. D.C. had a murder rate of 46.4. Based on mean & std. dev., do you think the distribution of murder rates is normal?
What is no
The annual per-capita utilization of apples (in pounds) in the U.S. can be approximated by a normal distribution with a mean of 17.4 pounds and a standard deviation of 4 pounds. What utilization represents the 75th percentile?
What is 20.08 pounds
Z=
What is value-mean/standard error
Find the indicated probability using the standard normal distribution P(-0.89)
What is 0.3133
In 1999, the murder rates (per 100,000 residents) for the 50 states and D.C. had a mean of 5.9 and std. dev. of 6.3. D.C. had a murder rate pf 46.4. If distribution were roughly normal, would this be unusually high?
What is yes, it is 3 std. dev. above the mean
The annual per-capita utilization of apples (in pounds) in the U.S. can be approximated by a normal distribution with a mean of 17.4 pounds and a standard deviation of 4 pounds. What utilization represents the 75th percentile? What annual per capita utilization of apples reps the 1st quartile?
What is 14.72 pounds?
What is a probability distribution that plots all of its values in a symmetrical fashion and most of the results are situated around the probability's mean?
What is distribution