Homework 1 - statistics for the United States in Crime in...

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STAT 34500/ STAT 51100 STATISTICS Spring 2011 Homework 1 Due: Thursday, January 27, 2011 Q.N. 1) A snack foods packaging company maintains quality control by randomly selecting production and weighing the bags, and then inspecting the contents. The weight of a bag should be 2 lbs. One day they found that the weight of the 10 cases was 20.5 lbs. . Identify a) the population, (b) the parameter of interest, (c) the sample, and (d) the sample statistic of this study. Q.N. 2) Let X denote the time in minutes that a vehicle must wait to get through a traffic light at a busy intersection. Below is a sample data. 0.2, 1.5, 2.3, 4.0, 0.5, 1.5, 2.5, 4.1, 0 .7, 1.6, 2.6, 4.5, 1.1, 1.6, 2.9, 5.1, 1.2, 1.7, 2.8, 5.8, 1.2, 1.9, 3.0, 1.4, 1.3, 2.0, 3.1, 1.4, 2.1, 3.0, 1.4, 2.1, 3.7, 1.4, 2.2, 3.7 a) Construct a stem and leaf diagram of this data set b) Construct a histogram of this data set. Q.N. 3) The department of Justice and the Federal Bureau of Investigation publish a compilation on crime
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Unformatted text preview: statistics for the United States in Crime in the United States. The following table provides a frequency distribution for robbery type during a one year period. Robbery type Frequency Street/highway 179,296 Commercial house 60,493 Gas or service station 11,362 Convenience Store 25,774 Residence 56,641 Bank 9,504 Miscellaneous 70,333 a) Draw a pie chart. b) Construct a bar graph for the relative frequencies. Q.N. 4) The following data shows the Maximal static inspiratory pressure (PI Max) for 15 patients. 105, 80, 115, 95, 100, 85, 90, 70, 135, 105, 45, 115, 40, 115, 95 a) Compute the mean, variance, standard deviation, lower quartile, upper quartile and the median of the data. b) Construct the box-plot and identify if there is an outlier. Q.N. 5) From the textbook: Chapter 6- Q.N. 34. ( Please do not spend your time typing the data) Visit http://highered.mcgraw-hill.com/sites/007246836x/student_view0/chapter6/ to access the dataset....
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