Question

1. Heights of all tall buildings in San Francisco 500 feet or higher.

a) Is this a sample or population? _____ 500 525 529 529 538 541 550 564 565 569 570 573 600 600 641 645 695 779 853

b) Mean __________

c) Standard Deviation ___________

d) Variance ____________

e) 5# Summary ______________________________________

f) IQR _____________

g) Upper fence ____________

h) Lower fence ___________

i) Are there any outliers? _________

If so, identify them: ______________________

j) Make a stemplot k) Draw a boxplot showing any outliers

i) Shape? ______________________ (Leaf unit 10)

2. State the Empirical Rule for symmetric and near normal distributions.

Approximately _____% of the data lie within ___ standard deviation of the mean.

Approximately _____% of the data lie within ___ standard deviations of the mean.

Approximately _____% of the data lie within ___ standard deviations of the mean.

3. Class test scores are normally distributed with mean 64 and standard deviation 10.

Find the proportion of scores using the Empirical Rule.

Make a sketch for each problem.

a) X > 74 a) 44 < X < 74

b) X < 44

Answer 1