Statistics Mean Median Mode Standard Deviation

Find the median of these numbers:
4, 2, 7, 4, 3

• 2

• 5

• 7

• 4

The mean life of a tire is 30,000 km. The standard deviation is 2000 km.

Then, 68% of all tires will have a life between ___________ km and __________ km.

•  28,000 km and 32,000 km.

• 24,000 km and 34,000 km.

• 26,000 km and 34,000 km.

• 27,000 km and 31,000 km.

Pick the definition of an outlier.

• A value that lies outside of most other values in a data set.

• A value that is the largest.

• A value that is the smallest.

• A value that occurs the most.

If outliers are removed, what changes more significantly the mean or median?

• Mean

• Median

True or False: the mean and median values of shoe sizes shown in the dot plot for Group B are almost the same.

• True

• False

In a population of five university students with GPAs of 2.5, 2.3, 1.7, 1.4, and 1.1, a sample of three students are considered. What would be the standard deviation of the resulting sampling distribution?

• 0.53

• 0.41

• 0.35

• 0.22

On a recent test, a statistics professor finds that the mean and median scores are nearly equal. Which of the following could be the distribution of test scores?

• 
• 
• 
• None of these is correct

Which restaurant has a greater IQR?

• Lucy's Steakhouse

• Gary's Grill

• They are the same

Which club has the smaller spread, less variation?

• Cruisers

• Car Hops

Interquartile Range or IQR is a measure of variability and helps determine the spread of the data.

• True

• False