Chapter 11, Problem 23P

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8th Edition

Frederick J Gravetter + 1 other

ISBN: 9781133956570

Textbook Problem

At the Olympic level of competition, even the smallest factors can make the difference between winning and losing. For example, Pelton (1983) has shown that Olympic marksmen shoot much better if they fire between heartbeats, rather than squeezing the trigger during a heartbeat. The small vibration caused by a heartbeat seems to be sufficient to affect the marksman’s aim. The following hypothetical data demonstrate this phenomenon. A sample of *n* = 8 Olympic marksmen fires a series of rounds while a researcher records heartbeat. For each marksman, a score is recorded for shots fired during heartbeats and for shots fired between heartbeats. Do these data indicate a significant difference? Test with

To determine

Whether there is any difference between Olympic batsman shoot scores during heart beats and between heart beats.

Explanation

**Given info:**

The data represents the measurements of during heartbeat and between heartbeats for the 8 participants.

**Calculation:**

Calculate the difference *D* and

Participants | White background | Red background | ||

A | 93 | 98 | 5 | 25 |

B | 90 | 94 | 4 | 16 |

C | 95 | 96 | 1 | 1 |

D | 92 | 91 | -1 | 1 |

E | 95 | 97 | 2 | 4 |

F | 91 | 97 | 6 | 36 |

G | 92 | 95 | 3 | 9 |

H | 93 | 97 | 4 | 16 |

Total | 24 | 108 |

The value of

Thus, the value of

The value of

Thus, the value of

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