Discussion:
Q: Dave the jogger runs the same route every day (about 2.2 miles). On 18 consecutive days, he recorded the number of steps using a pedometer. The results were
3450
3363
3228
3360
3304
3407
3324
3365
3290
3289
3346
3252
3237
3210
3140
3220
3103
3129
Construct a 90 percent confidence interval for the true mean number of steps Dave takes on his run