Practice for Unit 4 Test

What year? Mt. Saint Helen's erupts, Rubik's Cube debuts, USA defeats Soviet Union to Olympic hockey gold

Which method would improve the accuracy of a sample?

What year? Obama inaugurated, Michael Jackson dies, Florida Gators win BCS Title over Oklahoma

Calculate the range of the following data set: 15, 14, 25, 33, 12, 21, 17, 28

If the standard deviation of the residuals is small, then...?

When the design of a study would consistently give an over or underestimate of the true value.

Year of the Titanic sinking.

If a person's IQ level is ranked at a z-score of 4.8, you should conclude...

A study is biased if....

The following is a list of scores on a test: 75, 60, 96, 92, 88, 81, 78, 65, 83, 89. Find the standard deviation.

For what distribution is it NOT possible for the mean to equal the median?

The world's largest city by population is...?

The capital city of Saudi Arabia is...?

A group of experimental units that are similar within, but different from another group.

In a skew left distribution, the median is _________ the mean.

SAT scores have a mean of 1800 and a standard deviation of 50. What proportion of scores is between 1800 and 1900?

A student's scores on consecutive math tests are as follows: 85, 70, 86, 92, 87, 78. What is the mean?

The largest body by volume of fresh water in the world is...?

A study that attempts to survey every member of the population.

When knowing the value of one variable helps to predict the value of another variable.

Which student has the highest z-score?

Which data set will have the largest standard deviation? No calculator allowed.

What are the chances Grant rolls back-to-back 6's again?

Control groups are used in experiments to...?

What range of z-scores comprises nearly 100% of a normally distributed data set?

Cities with major league baseball teams tend to have higher rates of crime. The reason is probably due to...?

What percentile corresponds to a z-score of -.5?

An data point is (7, 16). The least-squares line is y = .85X + 12. Calculate the residual for this data point.

ACT scores have a mean of 21. 3 and a standard deviation of 1.6. What proportion of students score between 20 and 23?

What is the z-score that represents the 60th percentile?

The first game of the 2020 NFL season is tonight. The two teams playing are...?

For a skew right distribution, the mean is _____________ than the median.

A least-squares regression line is technically defined as doing what?

Who did not cover Bob Dylan's original recording of "All Along the Watchtower?"

For a residual plot to suggest linear data, it must...?

What album has the most sales world-wide all-time?

What mean and standard deviation of test scores would produce the smallest IQR?

Calculate the interquartile range from the following set of data: 5, 8, 10, 13, 14, 15, 18, 20, 22, 24, 25

The mean height and standard dev. for the hoops team is 70 in and 2.1 in, respectively. What percent is between 67 & 71

Identify the mode for the following set of data: 21, 32, 32, 44, 33, 45, 33, 46, 44, 33, 31, 30, 46

Find the median for the following data set: 11, 13, 17, 11, 10, 15, 11, 12, 13, 15

What year? Winter Olympics in Salt Lake City, Queen Elizabeth of UK passes away, a sniper terrorizes Washington D.C.

A graph of quantitative data with two clear peaks.

Who played Batman in the 1989 Batman film starring Jack Nicholson as Joker?

Which graph uses the 5-number summary?

The 5-number for a set of data is: 3, 10, 15, 17, 20. What proportion of results is between 10 and 20?

A random sample of students at MHS most likely means the population would be...?

a z-score of 1 corresponds to what percentile?

If z- score values for z = -1 and z = 2 respectively are 60 and 75, what is the mean?

What z-scores represent the middle 50 percent of a normally distributed data set?