Lab Assignment 1.3, 1.4
- Page ID
- 36453
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Name:__________________________________________Date:____________________Row:________
Lab Assignment 1.3, 1.4
1. determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate.
a. Types of movies.
b. Microwave voltage measurements.
c. Ratings of restaurant on a scale from 0 starts to 4 starts.
d. Temperature of oven when baking a cake.
2. Sixty adults with gum disease were asked the number of times per week they used to floss before their diagnosis. The incomplete results are shown below:
| # Flossing per Week | Frequency | Relative Frequency | Cumulative Relative Frequency |
| 0 | 27 | 0.4500 | |
| 1 | 18 | ||
| 3 | 0.9333 | ||
| 6 | 3 | 0.0500 | |
| 7 | 1 | 0.0167 |
a. Fill in the blanks in the table above.
b. What percent of adults flossed six times per week?
c. What percent flossed at most three times per week?
d. What percent flossed 6 or 7 times per week?
2. Forbes magazine published data on the best small firms in 2012. These were firms which had been publicly traded for at least a year, have a stock price of at least $5 per share, and have reported annual revenue between $5 million and $1 billion. Table shows the ages of the chief executive officers for the first 60 ranked firms.
| Age | Frequency | Relative Frequency | Cumulative Relative Frequency |
| 40-44 | 3 | ||
| 45-49 | 11 | ||
| 50-54 | 13 | ||
| 55-59 | 16 | ||
| 60-64 | 10 | ||
| 65-69 | 6 | ||
| 70-74 | 1 |
a. What is the frequency for CEO ages between 54 and 65?
b. What percentage of CEOs are 65 years or older?
c. What is the relative frequency of ages under 50?
d. What is the cumulative relative frequency for CEOs younger than 55?
3. How does sleep deprivation affect your ability to drive? A recent study measured the effects on 19 professional drivers. Each driver participated in two experimental sessions: one after normal sleep and one after 27 hours of total sleep deprivation. The treatments were assigned in random order. In each session, performance was measured on a variety of tasks including a driving simulation. Use key terms from this module to describe the design of this experiment.
a. Explanatory variable:
b. Response variable:
c. Treatments:
d. Experimental unit:
e. Lurking variable:
f. Random assignment:
g. Control group:
f. Blinding: