Explain what measures of central tendency are and how ONE OF THEM IS used to find the standard deviation.
3
3
3
3
3
3
3
6
Question 10
10.
The mean price of new homes from a sample of houses is $155,000 with a standard deviation of $15,000. the dataset has a bell-shaped distribution. Between what 2 prices do 95% of the houses fall? Show all work on response sheet and explain.
Refer to the sample statistics from the previous problem (#10) and use z-scores to determine which, if any, of the following home prices are unusual.
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3
3
3
For #15-18 use the following data:
The number of wins for each Major League Baseball team in 2003 are listed.
5
3
5
5
For #2-9 use the following set of data:
Weekly salaries (in dollars) for a sample of registered nurses are listed
774, 446, 1019, 795, 908, 667, 444, 960
Question 2
2.
What is the mean of the data? (round to the nearest tenth)
Question 3
3.
What is the median of the data? (round to the nearest tenth)
Question 4
4.
What is the mode of the data?
Question 5
5.
Which of the measures of central tendency best describes a typical salary?
Question 6
6.
What is the range of the data?
Question 7
7.
What is the variance of the data? (round to the nearest tenth)
Question 8
8.
What is the standard deviation of the data? (round to the nearest tenth)
Question 9
9.
Sketch a graph to represent the situation using the Empirical Rule. Complete on response sheet.
Question 11
11.
$200,000
Question 12
12.
$55,000
Question 13
13.
$175,000
Question 14
14.
$122,000
Question 15
15.
Find the quartiles of the data. (Q1, Q2, Q3)
Question 16
16.
Find the interquartile range.
Question 17
17.
Construct a box-and-whiskers plot.
Question 18
18.
Are any of the win totals considered outliers? Explain why and show evidence for support.