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Stats Ch 1-3(questions with verified solutions)
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Stats Ch 1-3(questions with verified solutions)
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Stats Ch 1-3When your professor announces the average exam score for the class she is using:
inferential statistics.
ordinal variables.
nominal variables.
descriptive statistics. - correct answer ✔✔descriptive statistics
What is the primary difference between descriptive and inferential statistics?
- Descriptive statistics are better able to control confounding variables than inferential statistics.
- Inferential statistics typically have greater reliability than descriptive statistics.
- Inferential statistics typically involve larger amounts of data than descriptive statistics.
- Inferential statistics allow researchers to draw conclusions about populations while descriptive
statistics simply organize and summarize data. - correct answer ✔✔Inferential statistics allow
researchers to draw conclusions about populations while descriptive statistics simply organize and
summarize data.
College students at 50 campuses around the country were polled to find out how many students own
smart phones. This small representative group of students is called a:
- mode.
-population.
-sample.
-median. - correct answer ✔✔sample.
Why are samples more commonly studied than populations?
- Samples are typically more accurate than populations.
- Most researchers are lazy.
- It is usually impossible to study an entire population.
, - Populations can only be studied if the data are continuous. - correct answer ✔✔It is usually impossible
to study an entire population.
There are three different types of Olympic medals: gold, silver, and bronze. What kind of variable
describes the different types of Olympic medals?
- ordinal
- interval
- ratio
- nominal - correct answer ✔✔ordinal
The numbers on athletes' uniforms are an example of a(n) _________ variable.
- ratio
- interval
- nominal
- ordinal - correct answer ✔✔nominal
If your coach reports the team's race averages to two decimal places (e.g., 15.04 seconds) this would be
considered a(n) ___________ observation.
- discrete
- nominal
- continuous
- ordinal - correct answer ✔✔continuous
The total number of women in a country is an example of which kind of variable?
- ratio
- ordinal
- interval
- nominal - correct answer ✔✔ratio
The main difference between an interval variable and a ratio variable is that an interval variable:
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