Solve the Problem. -The Winning Times (In Seconds) in a Speed-Skating Event for Speed-Skating

question 120

Multiple Choice

Solve the problem.
-The winning times (in seconds) in a speed-skating event for men can be represented by the expression 46.77 - 0.091x, where x represents the year, with x = 0 corresponding to 1920. (For example in 1992, x would be
1992 - 1920 = 72.) What would the winning time in 1950 be according to the model? Round your answer to the
Nearest hundredth.

• A) 45.86 sec
• B) 44.95 sec
• C) 1400.37 sec
• D) 44.04 sec

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Definitions:

Standard Normal Distribution

A type of normal distribution where the mean is 0 and the standard deviation is 1.

Mean

The arithmetic average of a set of numbers, calculated by adding up all the values and dividing by the count of numbers.

Variance

A statistical measure that determines the spread of numbers in a data set by calculating the mean of the squared differences from the mean.

Standard Normal

A normal distribution with a mean of zero and a standard deviation of one, commonly used in statistical analysis.