Do one of the following, as appropriate. (a) Find the critical
value z Subscript alpha divided by 2, (b) find the critical value
t Subscript alpha divided by 2, (c) state that neither the normal
nor the t distribution applies. Confidence level 98%; n=23 SD=
26.2; population appears to be normally distributed.
Do one of the following, as appropriate. (a) Find the critical
value z Subscript alpha divided by 2, (b) find the critical value
t Subscript alpha divided by 2, (c) state that neither the normal
nor the t distribution applies. Confidence level 98%; n=23 SD=
26.2; population appears to be normally distributed.
Find the critical values, chi Subscript 1 minus alpha divided
by 2 Superscript 2 and chi Subscript alpha divided by 2 Superscript
2, for 95% confidence and nequals12. Round to the nearest
thousandth.
Determine the upper-tail critical value
t Subscript alpha divided by 2tα/2
in each of the following circumstances.
.a.
1 minus alpha equals 0.90 comma n equals 161−α=0.90, n=16
.d.
1 minus alpha equals 0.90 comma n equals 261−α=0.90, n=26
.b.
1 minus alpha equals 0.95 comma n equals 161−α=0.95, n=16
e.
1 minus alpha equals 0.99 comma n equals 81−α=0.99, n=8
c.
1 minus alpha equals 0.90 comma n equals 681−α=0.90, n=68
Determine the upper-tail critical value
t Subscript alpha divided by 2tα/2
in each of the following circumstances.
a.a.
1 minus alpha equals 0.90 comma n equals 581−α=0.90, n=58
d.d.
1 minus alpha equals 0.90 comma n equals 131−α=0.90, n=13
b.b.
1 minus alpha equals 0.95 comma n equals 581−α=0.95, n=58
e.e.
1 minus alpha equals 0.99 comma n equals 231−α=0.99, n=23
c.c.
1 minus alpha equals 0.90 comma n equals 301−α=0.90, n=30
a. T= __ (Round to four decimal places...
Determine the upper-tail critical value
t Subscript alpha divided by 2tα/2
in each of the following circumstances.
a.a.
1 minus alpha equals 0.95 comma n equals 221−α=0.95, n=22
d.d.
1 minus alpha equals 0.95 comma n equals 341−α=0.95, n=34
b.b.
1 minus alpha equals 0.99 comma n equals 221−α=0.99, n=22
e.e.
1 minus alpha equals 0.90 comma n equals 531−α=0.90, n=53
c.c.
1 minus alpha equals 0.95 comma n equals 461−α=0.95, n=46
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1. Complete the problems below.
a. Find the critical value z a/2 that corresponds to 93%
confidence level.
Z a/2 = _____
Q1 (ROUND TO 2 DECIMAL PLACES)
b.You plan to conduct a survey to estimate the percentage of
people who eat breakfast. Find the number of people who must be
surveyed if you want to be 93% confident that the sample percentage
is within two percentage points of the true population
percentage.
(USE YOUR ANSWER FROM PROBLEM #1a for...
1. Find the critical value
?) ??/z 2 , for a 96% confidence level.
?) ??/z 2 , for a 99.5% confidence level.
?) ??/z 2 , for a 98% confidence level and for a sample of size
24.
?) ta/z 2 , for a 90% confidence level and for a sample of size
39.