Mid-Term Review - Honors Stats - Units 1-3

Front

Estimate the correlation coefficient for this scatterplot.

Back

B) r = 0.89

Front

A ____________ is a characteristic or attribute of a subject that can assume different values?

Back

variable

Front

What is the probability of flipping a coin and getting heads?

Back

1/2

Front

What is the probability that the person picked will be a boy given they speak German?

Back

.7273

Front

An insurance company crashed four cars in succession at 5 miles per hour. The costs of repair for each of the four crashes were $425, $456, $404 and $227. Compute the sample variance cost of repair. (Round to the nearest whole number as needed)

Back

10590

Front

What does a correlation coefficient of 1 indicate?

Back

Perfect positive correlation.

Front

What does a correlation coefficient of -1 indicate?

Back

Perfect negative correlation.

Front

What is the formula for calculating sample variance?

Back

Variance = (Σ(x - x̄)²) / (n - 1) where x̄ is the sample mean.

Front

Define 'probability'.

Back

Probability is a measure of the likelihood that an event will occur.

Front

What is the range of possible values for a correlation coefficient?

Back

-1 to 1.