Question
In: Statistics and Probability
Find the standardized test statistic t for a sample with nequals12, x overbarequals31.2, sequals2.2, and alphaequals0.01...
Find the standardized test statistic t for a sample with nequals12, x overbarequals31.2, sequals2.2, and alphaequals0.01 if Upper H 0 : mu equals 30. Round your answer to three decimal places.
Solutions
Expert Solution
Answer:- the value of
standardized test statistic t is 1.905
orchestra answered 1 year agoRelated Solutions
The test statistic of a two-tailed t-test for a sample size of 12 was found to...
The test statistic of a two-tailed t-test for a sample
size of 12 was found to be 2.1. At a significance level of α = 0.05
,which of the following statements is correct?
Group of answer choices
a.The P-value is smaller than 0.05
b.We fail to reject the Null hypothesis
c.The test statistic is in the critical region
d.The alternative hypothesis is H1:
A market researcher wants to estimate the proportion of
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3. Find the rejection region (for the standardized test statistic) for each hypothesis test. Identify the...
3. Find the rejection region (for the standardized test
statistic) for each hypothesis test. Identify the test as
left-tailed, right-tailed, or two-tailed.
H0:μ=141H0:μ=141 vs. Ha:μ<141Ha:μ<141 @
α=0.20.α=0.20.
H0:μ=−54H0:μ=−54 vs. Ha:μ<−54Ha:μ<−54 @
α=0.05.α=0.05.
H0:μ=98.6H0:μ=98.6 vs. Ha:μ≠98.6Ha:μ≠98.6 @ α=0.05.α=0.05.
H0:μ=3.8H0:μ=3.8 vs. Ha:μ>3.8Ha:μ>3.8 @ α=0.001.
Find the P-value for the hypothesis test with the standardized test statistic z. Decide whether to...
Find the P-value for the hypothesis test with the standardized
test statistic z. Decide whether to reject H0 for the level of
significance α. ( Marks 2)
Right-tailed test
z = 0.52
α = 0.06
Question No 4 Find the P-value for the hypothesis test with the standardized test statistic z....
Question No 4
Find the P-value for the hypothesis test with the standardized
test statistic z. Decide whether to reject H0 for the level of
significance α. (Marks 1.5)
Left -tailed test
z = -1.52
α = 0.04
A trucking firm suspects that the mean life of a certain tire
it uses is less than 35,000 miles. To check the claim, the firm
randomly selects and tests 18 of these tires and gets a mean
lifetime of 34,450 miles with...
Find the P-value for the hypothesis test with the standardized test statistic z. Decide whether to...
Find the P-value for the hypothesis test with the standardized
test statistic z. Decide whether to reject H0 for the level of
significance α.
Right-tailed test
z = 0.52
α = 0.06
A manufacturer claims that the mean lifetime of its fluorescent
bulbs is 1000 hours. A homeowner selects 40 bulbs and finds the
mean lifetime to be 990 hours with a standard deviation of 80
hours. Test the manufacturer’s claim. Use α = 0.04 and use
traditional approach.
Find the P-value for the indicated hypothesis test with the given standardized test statistic, z. Decide...
Find the P-value for the indicated hypothesis test with the
given standardized test statistic, z. Decide whether to reject
Upper H0
for the given level of significance
alphaα.
Two-tailed test with test statistic
zequals=−2.18
and
alphaαequals=0.04
P-valueequals=
p-value=___ (round to four decimal places if needed)
state your conclusion.
fail to reject or reject h0
#38
1. For the standardized test statistic approach to hypothesis testing, calculate the test statistic for testing...
1. For the standardized test statistic approach to hypothesis
testing, calculate the test statistic for testing the null
hypothesis that the population mean is less than or equal to
9.29, given a sample mean of
13.90, a sample size of 35, and a
population standard deviation of 3.92.
Round to two decimals.
2. Using the traditional hypothesis testing approach, calculate
the critical value for testing the null hypothesis that the
population mean is greater than or equal to 13,
given...
State whether the standardized test statistic t indicates that you should reject the null hypothesis. Explain....
State whether the standardized test statistic t indicates that
you should reject the null hypothesis. Explain. (a) t (b) t (c)
t (d) t -4 0 4 t A normal curve is over a horizontal axis and is
centered at 0. Vertical line segments extend from the horizontal
axis to the curve at negative t@Sub{0}=negative 2.058, 0 and
t@Sub{0}=2.058, where negative t@Sub{0}=negative 2.058 is to the
left of 0 and t@Sub{0}=2.058 is to the right of 0. The area under...
Which statement below describes a property of the t statistic of the one-sample t test? A....
Which statement below describes a property of the t statistic of
the one-sample t test?
A.
The distribution of the t statistic (t distribution) under
H0 has a smaller (i.e. more narrow) spread than
a standard normal distribution.
B.
The distribution of the t statistic (t distribution) under
H0 depends on n.
C.
The distribution of the t statistic (t distribution) under
H0 cannot be estimated unless n is
large.
D.
Both A and B.
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