Question

Generally, the average typing speed is 56 words per minute (wp).
A professor wanted to see where his students stand compared to the
population. He tested 24 of his students and obtained the following
estimates: an average typing speed of 58 with a variance of 361.00.
What can the professor conclude with α = 0.01?

**a)** What is the appropriate test statistic?

---Select--- na z-test One-Sample t-test Independent-Samples t-test
Related-Samples t-test

Also state population and sample from choices below

Population:

---Select--- student typing speed the professor the students
average typing speed typing speed

Sample:

---Select--- student typing speed the professor the students
average typing speed typing speed

**b)** Compute the appropriate test statistic(s) to
make a decision about *H*_{0}.

(Hint: Make sure to write down the null and alternative hypotheses
to help solve the problem.)

critical value = ; test statistic =

Decision: ---Select--- Reject H0 Fail to reject H0

**c)** If appropriate, compute the CI. If not
appropriate, input "na" for both spaces below.

[ , ]

**D** Compute the corresponding effect size(s) and
indicate magnitude(s).

If not appropriate, input and/or select "na" below.

*Find d* = ; ---Select--- na trivial
effect small effect medium effect large effect

*Find r*^{2} = ; ---Select---
na trivial effect small effect medium effect large effect

Make an interpretation based on the results.

A. Student typing speed is significantly higher than average.

B . Student typing speed is significantly lower than average.

C.Student typing speed did not significantly differ from the average.

Answer #1

2-tailed t-test | ||

mean | 58 | |

sd | 19 | |

n | 24 | |

alpha | 0.01 | |

mu | 56 | |

a) | one sample t-test | |

population | average typing speed | |

sample | typing speed of students | |

b) | ||

critical | 2.8073 | |

TS | 0.5157 | |

decision | fail to reject | |

c) | ||

lower | -8.8879 | |

upper | 12.8879 | |

d) | ||

d | 0.1053 | trivial |

r^2 | 0.0114 | small |

interpretation | option C) | |

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