Question

A swimming school claimed that the average seven-year-old would
be able to swim across an Olympic-sized pool in less than 2 minutes
after taking lessons from their instructors. To test this claim, a
consumer psychologist arranged for eight randomly selected
seven-year-old children to take lessons at the school and recorded
how long it took each child to swim across a pool at the end of the
lessons. The average time (in seconds) was a 95 with a sum of
squares of 4200. What conclusion would the psychologist draw
following a two-tailed *t* test for a single sample using
120 seconds as the "known" population mean and the .05 significance
level.

21. What is the degrees of freedom?

22. What is the estimated standard deviation?

23. What is the cutoff score (critical values) on the t distribution?

24. What is the t statistic?

25. Is the test significant and summarize the results of this study (No APA style needed)?

Answer #1

21-25. A swimming school claimed
that the average seven-year-old would be able to swim across an
Olympic-sized pool in less than 2 minutes after taking lessons from
their instructors. To test this claim, a consumer psychologist
arranged for eight randomly selected seven-year-old children to
take lessons at the school and recorded how long it took each child
to swim across a pool at the end of the lessons. The average time
(in seconds) was a 95 with a sum of...

A swimming school claimed that the average seven-year-old would
be able to swim across an Olympic-sized pool in less than 120
seconds after taking lessons from their instructors. To test this
claim, a consumer psychologist arranged for eight randomly selected
seven-year-old children to take lessons at the school and recorded
how long it took each child to swim across a pool at the end of the
lessons [sample mean (M) = 95, and estimated population variance
(S2) = 600]. Using...

A swimming school claimed that the average seven-year-old would
be able to swim across an Olympic-sized pool in less than 120
seconds after taking lessons from their instructors. To test this
claim, a consumer psychologist arranged for eight randomly selected
seven-year-old children to take lessons at the school and recorded
how long it took each child to swim across a pool at the end of the
lessons [sample mean (M) = 95, and estimated population variance
(S2) = 600]. Using...

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