101 • • Name:

steps per minute
150.2
157.2
154.8
155.8
158.8
157.4

Last night I ran on a treadmill which tracked my steps per minute. I recorded my steps per minute six times during a 30 minute run. Use the data to calculate a 95% confidence interval for the population mean number of steps.

  1. __________ Calculate the sample size n.
  2. __________ Calculate the sample mean x.
  3. __________ Calculate the sample standard deviation sx.
  4. __________ Calculate the standard error SE of the sample mean x
  5. __________ Calculate tcritical for a confidence level c of 95%
  6. __________ Calculate the margin of error E for the sample mean x.
  7. Write out the 95% confidence interval for the population mean μ steps per minute.
    p( __________ < μ < __________ ) = 0.95
  8. __________ My population mean steps per minute while joggling is 150 steps per minute. Could my treadmill steps per minute be 150 based on the above data?