Posted: May 1st, 2021

3,450 |
3,363 |
3,228 |
3,360 |
3,304 |
3,407 |
3,324 |
3,365 |
3,290 |

3,289 |
3,346 |
3,252 |
3,237 |
3,210 |
3,140 |
3,220 |
3,103 |
3,129 |

a) Construct a 95% confidence interval for the true mean number of steps Dave takes on his run. (Round your answers to 4 decimal places.)

b) What sample size would be needed to obtain an error of ± 20 steps with 95% confidence? (Enter your answer as a whole number (no decimals). Use a z-value taken to three decimal places in your calculations.)

SHOW THE WORK IF POSSIBLE. I know the mean is 3278.7222 and the standard deviation is 97.0535.

Place an order in 3 easy steps. Takes less than 5 mins.