A Professional Baseball Player Changed His Throwing Motion to Increase

question 19

Essay

A professional baseball player changed his throwing motion to increase the velocity of his fastball. Before the change, the player threw his fastball at an average of 91 miles per hour. After the change in his throwing motion, the team watched him throw 64 fastballs with an average speed of 91.75 miles per hour and a standard deviation of 3 miles per hour.
A) Specify the null and alternative hypotheses to determine whether the baseball player increased the speed of his fastball.
B) Calculate the value of the test statistic and the p-value.
C) At the 1% significance level, can you conclude that the baseball player has increased the speed of his fastball? Explain.

• A) Specify the null and alternative hypotheses to determine whether the baseball player increased the speed of his fastball.
• B) Calculate the value of the test statistic and the p-value.
• C) At the 1% significance level, can you conclude that the baseball player has increased the speed of his fastball? Explain.

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Definitions:

Languages

Systematically arranged sets of symbols and rules that enable humans to communicate or the programming languages designed to give instructions to machines.

Post Increment

An operation, often seen in programming, that increases the value of a variable by one but returns the original value within the expression where it's used.

Pre Increment

An operation that increases a variable's value by one before the variable is used in an expression.

String Method

A function or operation available for string objects that allow manipulation of textual data, such as concatenation, extraction, or comparison.