10.A simple random sample of size n is drawn. The sample mean,
x overbarx,
is found to be 19.2,
and the sample standard deviation, s, is found to be 4.3.
.
(a) Construct a 95%
confidence XXXXXXXX XXXXX
muX
XX XXX sample XXXX, n, XX XX.
XXXXX bound:
XXXXXXX;
Upper bound: nothing
(XXX XXXXXXXXX order. XXXXX to two XXXXXXX places as XXXXXX.)
(b) XXXXXXXXX a 95%
confidence interval XXXXX muμ
if XXX XXXXXX XXXX, n, is XX.
XXXXX bound:
nothing;
Upper bound: nothing
(XXX XXXXXXXXX order. Round XX two decimal XXXXXX XX XXXXXX.)
XXX XXXX XXXXXXXXXX the XXXXXX size XXXXXX XXX XXXXXX XX XXXXX, E?
X.XXX margin XX XXXXX increases.
X.The margin XX error decreases.
X.XXX margin of XXXXX XXXX not change.
(c) XXXXXXXXX a XX%
confidence interval about
XXX
if XXX sample XXXX, n, is 35.
XXXXX bound:
XXXXXXX;
Upper bound: nothing
(Use ascending order. XXXXX to two XXXXXXX places as needed.)
XXXXXXX the XXXXXXX to those obtained in part (a). XXX XXXX XXXXXXXXXX the level of confidence XXXXXX XXX XXXX of XXX margin XX error, E?
X.The margin XX XXXXX XXXXXXXXX.
X.The margin XX XXXXX does not change.
X.
XXX margin of XXXXX XXXXXXXXX.
(d) If XXX sample size is
1818,
what conditions XXXX XX satisfied to XXXXXXX XXX confidence XXXXXXXX?
A.
The sample XXXX must be XXXXX XXX XXX XXXXXX should not XXXX any outliers.
B.
The XXXXXX XXXX XXXX XXXX XXXX a population that XX XXXXXXXX distributed with no outliers.
C.
XXX XXXXXX XXXX XXXX XXXX a population XXXX XX normally distributed and the sample XXXX XXXX XX XXXXX
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