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- Date Submitted: 08/17/2016 5:41 AM
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QNT 275 NEW FINAL EXAM 2016

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What is the name of the variable that's used to predict another variable?

Explanatory

Standard error of the estimate

Response

Coefficient of determination

Professors at a local university earn an average salary of $80,000 with a standard deviation of $6,000. The salary distribution is approximately bell-shaped. What can be said about the percentage of salaries that are at least $74,000?

About 97.5 percent

About 84 percent

About 68 percent

About 95 percent

What type of relationship is indicated in the scatterplot?

A positive linear or curvilinear relationship

No relationship

A negative curvilinear relationship

A negative linear relationship

The study of statistics can be defined as:

the art and science of getting information from data.

All of the answers

the language of data.

the study of collecting, analyzing, presenting, and interpreting data.

In the accompanying stem-and-leaf diagram, the values in the stem and leaf portions represent 10s and 1s digits, respectively.

The stem-and-leaf diagram shows that the distribution is ___________.

symmetric

positively skewed

negatively skewed

None of the answers

Which of the following is most influenced by outliers?

Median

Mode

75th percentile

Mean

serial correlation is typically observed in:

sparse data

outliers

cross-sectional data

time series data

n the sample regression equation what is ?

The value of y when x = 0

The predicted value of y, given a specific x value

The slope of the equation

The y-intercept

bias can occur in sampling. Bias refers to _____________________.

the use of cluster sampling instead of stratified random sampling

the division of the population into overlapping groups

the tendency of a sample statistic to systematically over-or underestimate a population parameter

the creation of strata, which are proportional to the...