Overview

ci
q10


Sheet 1: ci

sound speed (m/s)

374.65 sample mean 383.33
319.54 st. deviation 46.21
377.08 sample size n 9
373.61 degrees of free 8
430.5 t-critical 2.31
419 stand error 15.4
315.9 margin of error 35.52
387.5 lower bound 347.81
452.2 upper bount 418.85

Sheet 2: q10

Reflectors


84 sample size n 16
74 sample mean 69.75
78 sample standard dev sx 9.55
61 point estimate of pop mean µ 69.75
67 standard error SE 2.39
55 degrees of freedom 15
54 tcritical 2.13
62 margin of error for the mean E 5.09
61


83 64.66 ≤ µ ≤ 74.84
81


75


70


65


70


76