Question

**4. With 90% confidence, for sample mean 341.00, sample
standard deviation 14.80, and sample size 35, what is the upper
confidence limit with 2 decimal places?**

**8. Match the rules for rejecting H0 at the right to the
following tests**

a. Two-tail test with lower and upper reject regions

b. One-tail test with lower reject region

c. For any test hypothesis, ANOVA, or Chi Squared, this rule for rejecting H0 always applies.

d. One-tail test with upper reject region

(1) test statistic > positive critical value

(2) test statistic < negative critical value

(3) test statistic outside interval (negative critical value, positive critical value)

(4) pvalue < α

Answer #1

A sample of size 20 yields a sample mean of 23.5 and a sample
standard deviation of 4.3.
Test H0: Mean ≥ 25 at α = 0.10. HA: Mean < 25. This is a
one-tailed test with lower reject region bounded by a negative
critical value.
Which of the following are:
1) Pvalue 0.135. H0 not rejected. Conclude mean ≥ 25
plausible
2) None of the other answers are correct
3) Pvalue 0.068 H0 rejected. Conclude mean < 25
4)...

New
Current
Sample Size
10
10
Sample Mean
542.0000
570.5000
Sample Standard Deviation
38.1663
32.2706
df
Pooled Sample Standard Deviation
35.3416
Confidence Interval (in terms of New -
Current)
Confidence Coefficient
0.90
Lower Limit
Upper Limit
Hypothesis Test (in terms of New -
Current)
Hypothesized Value
Test Statistic
p-value (Lower Tail)
0.0441
p-value (Upper Tail)
p-value (Two Tail)
New
Current
Sample Size
10
10
Sample Mean
542.0000
570.5000
Sample Standard Deviation
38.1663
32.2706
df
17
Confidence Interval (in terms of...

Population Standard Deviation
5.0000
Sample Size
11
Sample Mean
54.9091
Confidence Interval
Confidence Coefficient
0.98
Lower Limit
Upper Limit
Hypothesis Test
Hypothesized Value
50
Test Statistic
P-value (Lower Tail)
P-value (Upper Tail)
P-value (Two Tail)
0.0012
Sample Size
11
Sample Mean
54.9091
Sample Standard
Deviation
5.5759
Confidence Interval
Confidence Coefficient
0.98
Lower Limit
Upper Limit
Hypothesis Test
Hypothesized Value
50
Test Statistic
P-value (Lower Tail)
P-value (Upper Tail)
P-value (Two Tail)
0.0154
Studies show that massage therapy has a variety...

Population Standard Deviation
150.0000
Sample Size
18
Sample Mean
554.6111
Confidence Interval
Confidence Coefficient
0.95
Lower Limit
Upper Limit
Hypothesis Test
Hypothesized Value
660
Test Statistic
P-value (Lower Tail)
0.0014
P-value (Upper Tail)
P-value (Two Tail)
Sample Size
18
Sample Mean
554.6111
Sample Standard
Deviation
162.8316
Confidence Interval
Confidence Coefficient
0.95
Lower Limit
Upper Limit
Hypothesis Test
Hypothesized Value
660
Test Statistic
P-value (Lower Tail)
0.0069
P-value (Upper Tail)
P-value (Two Tail)
The Hospital Care Cost Institute randomly selected 18...

New
Current
Sample Size
7
7
Sample Mean
518.2857
561.7143
Sample Standard Deviation
38.9774
27.5058
df
Pooled Sample Standard Deviation
33.7328
Confidence Interval (in terms of New -
Current)
Confidence Coefficient
0.95
Lower Limit
Upper Limit
Hypothesis Test (in terms of New -
Current)
Hypothesized Value
Test Statistic
p-value (Lower Tail)
0.0165
p-value (Upper Tail)
p-value (Two Tail)
New
Current
Sample Size
7
7
Sample Mean
518.2857
561.7143
Sample Standard Deviation
38.9774
27.5058
df
10
Confidence Interval (in terms of...

A sample mean, sample standard deviation, and sample
size are given. Use the one-mean t-test to perform the required
hypothesis test about the mean, μ, of the population from which the
sample was drawn. Use the critical-value approach.
, , n = 18, H0: μ = 10, Ha: μ < 10, α =
0.01
Group of answer choices
Test statistic: t = -4.43. Critical value: t = -2.33. Reject
H0. There is sufficient evidence to support the claim
that the...

A sample mean, sample standard deviation, and sample size are
given. Use the one-mean t-test to perform the required hypothesis
test about the mean, μ, of the population from which the sample was
drawn. Use the critical-value approach.
, , n = 11, H0: μ = 18.7, Ha: μ ≠ 18.7, α =
0.05
Group of answer choices
Test statistic: t = 1.03. Critical values: t = ±2.201. Do not
reject H0. There is not sufficient evidence to conclude
that...

2008
2007
Sample Size
36
36
Sample Mean
75.1944
69.4167
Sample Standard Deviation
15.0177
7.3149
df
50
Confidence Interval (in terms of 2008 -
2007)
Confidence Coefficient
0.80
Lower Limit
2.1621
Upper Limit
9.3935
Hypothesis Test (in terms of 2008 - 2007)
Hypothesized Value
0
Test Statistic
p-value (Lower Tail)
p-value (Upper Tail)
p-value (Two Tail)
2008-2007
Sample Size
36
Sample Mean
5.7778
Sample Standard Deviation
18.2790
Confidence Interval (in terms of 2008 -
2007)
Confidence Coefficient
0.80
Lower Limit...

2008
2007
Sample Size
36
36
Sample Mean
75.1944
69.4167
Sample Standard Deviation
15.0177
7.3149
df
50
Confidence Interval (in terms of 2008 -
2007)
Confidence Coefficient
0.80
Lower Limit
2.1621
Upper Limit
9.3935
Hypothesis Test (in terms of 2008 - 2007)
Hypothesized Value
0
Test Statistic
p-value (Lower Tail)
p-value (Upper Tail)
p-value (Two Tail)
2008-2007
Sample Size
36
Sample Mean
5.7778
Sample Standard Deviation
18.2790
Confidence Interval (in terms of 2008 -
2007)
Confidence Coefficient
0.80
Lower Limit...

2008
2007
Sample Size
36
36
Sample Mean
77.8889
69.6111
Sample Standard Deviation
14.1154
6.9004
df
50
Confidence Interval (in terms of 2008 -
2007)
Confidence Coefficient
0.80
Lower Limit
4.8769
Upper Limit
11.6786
Hypothesis Test (in terms of 2008 - 2007)
Hypothesized Value
0
Test Statistic
p-value (Lower Tail)
p-value (Upper Tail)
p-value (Two Tail)
2008-2007
Sample Size
36
Sample Mean
8.2778
Sample Standard Deviation
17.1591
Confidence Interval (in terms of 2008 -
2007)
Confidence Coefficient
0.80
Lower Limit...

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