Statistics for Everyday Life Practice quiz

What is step 4 in a statistical study?

• Draw Conclusions

• Identify Goals

• Make Inferences about the population

• Choose a representative

What is the range of values for this study: In a Harris Interactive survey if 1,006 adults, 96% say that they washed their hands when in a public restroom. The margin of error is 3 percentage points.

A clinical trial designed to determine whether daily doses of 81-mg aspirin tablets have any effect on pulse rates. If all the subjects in the aspirin treatment group are athletes and all the subjects in the control group are not athletes, then there is a danger of which of the following:

• Sample Size Too Small

• Confounding

• Blinding

In a Harris poll of 514 human resources professionals, 46% said that body piercings and tattoos were big grooming red flags. How many professionals said it was a red flag?

In a Wakefield Research survey, 1003 subjects were asked if they ever hesitated to give a handshake because of the fear of germs. If 24 of the respondents said that they were not sure, what is the percentage of the "not sure" responses?

If you spent $23,875 for goods, services and housing in 2014, use table 2.2 on pg 66 to find what the same purchases would have cost in 1980?

When you add the earthquake magnitudes 2.45, 3.62, 3.06, 3.30 and 1.09, then divide by the number of values, the result is 2.704. Which term best describes this value?

• Average

• Mean

• Median

• Mode

• Standard Deviation

Find the standard deviation of these earthquake magnitudes: 2.99, 2.58, 2.44, 2.91, 3.38

Listed below are counts of the numbers of chocolate chip in cookies. Find the standard deviation.

22, 22, 26, 24, 23, 27, 25, 20, 24, 26

What is the name of a distribution that has no mode?

• Uniform Distribution

• Single-Peaked Distribution

• Bimodal Distribution

• Trimodal Distribution