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Updated 25 May 2015

Sleep Lab (Due on 10 Jun)

Copyright © 2007–2015 by Stan Brown

Summary: You will gather some data about people’s sleeping habits and summarize the data.

Data Collection

Choose a systematic sample (k = 3) of 24 adults aged 18 or older, and ask them how many hours they slept last night (to the nearest hour), and their position for going to sleep (back, left side, right side, stomach, or unsure). Add yourself as the 25th data point. Record the answers using the form at the end of the lab, or separate paper laid out the same way.

Directions for This Lab

Data Analysis

Question 1 (points: 3):  State the date, time, and place where you took your sample. How did you choose your first participant, and how did you choose the others?

The next two questions apply to your data for sleeping position.

Question 2 (points: 2):  What is the type of the data? (Give the most specific answer.)

Question 3 (points: 5):  Out of bar graph, pie chart, histogram, and stem-and-leaf, construct the most appropriate graph for this data set. Include any necessary labels or scaling.

The rest of the questions apply to your data for hours slept.

Question 4 (points: 2):  What is the type of the data? (Give the most specific answer.)

Question 5 (points: 5):  Out of bar graph, pie chart, histogram, and stem-and-leaf, construct the most appropriate graph for this data set. Include any necessary labels or scaling.

Question 6 (points: 3):  Compute the mean and SD of this data set. Report them with their symbols, showing the unrounded numbers and then rounding to one decimal place.
Example:  = 2.059126028 → 2.1

Question 7 (points: 2):  Compute and report the five-number summary.

Question 8 (points: 4): On graph paper, draw a modified boxplot. Include any outliers, and show and label the axis. (No need for formulas: use your TI to help you.)

Question 9 (points: 2):  What’s your raw score? (How many hours did you sleep?) What’s your percentile rank — in other words, what percent of the sample slept less than you or the same amount? (Remember that you are part of the sample.)

Question 10 (points: 2):  Find your own z-score in this data set, rounded to two decimals. Beware The Big No-no!

Sleep Data Collected from 25 Persons
Hours slept
(nearest hour)
Position
(BA, LS, RS, ST, U)
Hours slept
(nearest hour)
Position
(BA, LS, RS, ST, U)
    
    
    
    
    
    
    
    
    
    
    
    
YOU  

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