Running head: WEEK 3ASSIGNMENT1
Week 3Assignment BUS308: Statistics for Managers Professor Name Date
7.11
Running head: WEEK 3ASSIGNMENT2 a. The sample mean is normally distributed. No, we do not have to make any assumptions about the shape of the population because the sample size is larger (> 30). b.
u2 = 20, 4 = 4/642 - 4/8 = .5
c.
= .0228
Mega Stat: normal distribution
P(lowe r)
P(uppe r)
z
X
mean
.9772
.0228
2.00
2 1
20
d.
s t d . d e v 0 . 5
= .1093
Mega Stat: normal distribution P(lowe r)
P(uppe r)
.1093
.8907
z 1.23
X
mean
19.385
20
st d. de v 0. 5
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