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CUNY John Jay College of Criminal Justice *

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250

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Statistics

Date

Feb 20, 2024

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jpeg

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1

Uploaded by SuperTurtlePerson278

vy sy arv s wWIHCTL O TNE IOHOWINE AesCrives quau(auve aata. i). the volume of a shipping container, in gallons ii). the name of the material from which the container is made iii). the shape of the container b) Determine which of the above describes quantitative data. Give some examples of discrete and continuous data. 6) If you were told that four students from a class of twenty were questioned for a poll about study habits, this would be an example of Note: It can seem like a confusing example of sampling, neither cluster nor random. How would you modify the example so it would be considered as either cluster or random sampling? How about systematic, stratified, or convenience sampling? 7) A pollster randomly samples 161 Democrats, 145 Republicans and 18 Independents (all registered voters) in Metro City and asks each poll participant which mayorial candidate he or she prefers. Identify the kind of sample that the pollster is using. Note: It can seem that this example is understated, in that it doesn't specify where the 161 Democrats, etc. came from. Were they split into those categories and then chosen randomly to have those specific numbers or were they chosen as a block that happened to have that makeup or were they simply approached on the street? Perhaps we don't see a clear implication from the example one way or another. How would you modify the example so it would be considered as stratified sampling? 8) The following frequency distribution presents the frequency of passenger vehicles that pass through a certain intersection from 8:00 AM to 9:00 AM on a particular day. Vehicle Type Frequency Motorcycle 13 Sedan 62 SUV 62 Truck 45 a) Construct a relative frequency distribution for the data. b) Construct a frequency bar graph for the data. ¢) Construct a relative frequency bar graph for the data. d) Construct a pie chart for the data. 9) a) Construct a stem-and-leaf plot for the following data. 23 43 40 55 37 51 42 32 48 36 39 35 30 40 21 23 34 31 22 1|4 Recall: A stem and leaf plot has the advantage over a grouped frequency distribution of retaining the actual data while still showing them in graphical form. b) Find the five number summary. Describe the type of distribution.
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