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Nineteen immigrants to the U.S were asked how many years, to the nearest year, they have lived in the U.S. The data are as follows:
The following table was produced:
Data | Frequency | Relative Frequency | Cumulative Relative Frequency |
---|---|---|---|
0 | 2 | 0.1053 | |
2 | 3 | 0.2632 | |
4 | 1 | 0.3158 | |
5 | 3 | 0.1579 | |
7 | 2 | 0.5789 | |
10 | 2 | 0.6842 | |
12 | 2 | 0.7895 | |
15 | 1 | 0.8421 | |
20 | 1 | 1.0000 |
A “random survey” was conducted of 3274 people of the “microprocessor generation” (people born since 1971, the year the microprocessor was invented). It was reported that 48% of those individuals surveyed stated that if they had $2000 to spend, they would use it for computer equipment. Also, 66% of those surveyed considered themselves relatively savvy computer users. ( Source: San Jose Mercury News )
Additional information: The survey was reported by Intel Corporation of individuals who visited the Los Angeles Convention Center to see the Smithsonian Institure's road show called “America’s Smithsonian.”
The next four questions refer to the following: A Lake Tahoe Community College instructor is interested in the average number of days Lake Tahoe Community College math students are absent from class during a quarter.
What is the population she is interested in?
D
Consider the following:
= number of days a Lake Tahoe Community College math student is absent
In this case, is an example of a:
A
The instructor takes her sample by gathering data on 5 randomly selected students from each Lake Tahoe Community College math class. The type of sampling she used is
B
The instructor’s sample produces an average number of days absent of 3.5 days. This value is an example of a
C
The next two questions refer to the following relative frequency table on hurricanes that have made direct hits on the U.S between 1851 and 2004. Hurricanes are given a strength category rating based on the minimum wind speed generated by the storm. ( http://www.nhc.noaa.gov/gifs/table5.gif )
Category | Number of Direct Hits | Relative Frequency | Cumulative Frequency |
---|---|---|---|
Total = 273 | |||
1 | 109 | 0.3993 | 0.3993 |
2 | 72 | 0.2637 | 0.6630 |
3 | 71 | 0.2601 | |
4 | 18 | 0.9890 | |
5 | 3 | 0.0110 | 1.0000 |
What is the relative frequency of direct hits were category 4 hurricanes?
B
What is the relative frequency of direct hits were AT MOST a category 3 storm?
B
The next three questions refer to the following: A study was done to determine the age, number of times per week and the duration (amount of time) of resident use of a local park in San Jose. The first house in the neighborhood around the park was selected randomly and then every 8th house in the neighborhood around the park was interviewed.
‘Number of times per week’is what type of data?
B
The sampling method was:
B
‘Duration (amount of time)’is what type of data?
C
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