# Ambition in Life

Pages: 6 (1719 words) Published: December 6, 2012
Assignment (2012)
IR

General Instructions:-Interpret all results.

Problem No. 1:-

The following data give the number of daily and Sunday newspapers published in each of the 13 western states during 2000: 7, 16, 92, 29, 6, 12, 11, 8, 18, 19, 6, 24, 9

Make a frequency distribution.
Calculate the mean, median, standard deviation and interquartile range for these data. Do these data contain an outlier? If so, drop the outlier and recalculate all the measures. Which of these measures changes by a larger amount when you drop the outlier? Which is the better measure of center for these data, the mean or the median? Which is the better measure of spread for the data, the standard deviation or the IQR? Explain. Make histogram and frequency curve of the data set.

Discuss the shape of distribution using moment ratios.

Using the US general survey data file, make a most suitable graph to compare the general happiness level for various races of respondents. Report important findings which you observed from graph.

Problem No. 2:-

The following table gives the earned run averages (ERAs) for the 2002 season for the pitching staffs of the 16 baseball teams in the national league.

Team ERATeamERA
Arizona3.92Milwaukee4.73
Atlanta3.13Montreal3.97
Chicago4.29New York3.89
Cincinnati4.27Pittsburgh4.23
Florida4.36St. Louis3.70
Houston4.00San Diego4.62
Los Angeles3.69San Francisco3.54

Construct a frequency distribution table. Take 3.00 as the lower limit of the first class and .50 as the width of each class. Calculate the grouped mean, variance and mode.
Calculate the grouped median, and the approximation for [pic] and [pic]. Do these data contain an outlier? If so, drop the outlier and recalculate all the measures. Which of these measures changes by a larger amount when you drop the outlier? Which is the better measure of center for these data, the mean or the median? Which is the better measure of spread for the data, the standard deviation or the IQR? Explain. Make histogram and frequency curve of the data set.

Discuss the shape of distribution using moment ratios.

Using the US general survey data file, make a most suitable graph to compare the general happiness level for various region of respondents. Report important findings which you observed from graph.

Problem No. 3:-

The state police, using radar, checked the speeds (in mph) of 30 passing motorists at a checkpoint. The results are listed below:

44, 38, 41, 50, 36 ,36, 43, 42, 49, 48, 35, 40, 37, 41, 43, 50, 45, 45, 39, 38, 50, 41, 47, 36 35, 40, 42, 43, 48, 33

Make a frequency distribution taking interval size 3.
Make a Boxplot, histogram, frequency curve.
Compute Mean , Median, Mode, Q1,Q2,D7, P50, P75. Interpret the results. Discuss similarities among measures if exist. Also compute variance and standard deviations and their interpretations. Do these data contain an outlier? If so, drop the outlier and recalculate all the measures. Which of these measures changes by a larger amount when you drop the outlier? Discuss the shape of distribution using moment ratios.

Using the US general survey data file, make a cluster bar chart and pie chart to compare the general happiness level for sex of respondents. Report important findings which you observed from graph.

Problem No. 4:-
A traffic inspector has counted the number of automobiles passing a certain point in 100 successive 20-minute time periods. The observations are listed below. 23 21 15 18 30 22 26 15 5 18 14 17 11 37 21 6 10 20 22 25 19 19 19 20 12 23 24 17 18 16 27 16 28 26 15 30 19 35 20 17 12 30 21 22 20 15 18 16 23 24 15 24 28 19 24 22 17 19 8 18 17 18 23 21 25 19 20 22 21 21 16 20 19 11 23 17 23 13 17 26 26 14...

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