Question
In: Statistics and Probability
1. assume it should be a z test. what decision would be made for a hypothesis...
1. assume it should be a z test. what decision would be made for a hypothesis test at significance 0.05 if you calculated a test statistic of 1.94?
a. Reject the null
b. sometimes reject the null
c. reject the alternative
d. do not reject the null
2. A sample of size 24 is collected, with sample average 47.1. If the population standard deviation is 12, what decision would be made to test that the population mean equals 50 at significance 0.01?
a. Reject the null
b. sometimes reject the null
c. reject the alternative
d. do not reject the null
3. A sample of size 16 is collected, with sample average 77. If the population standard deviation is 7. What decision would be made for a one-tailed test that the population mean equals 75 at significance 0.05?
a. Reject the null
b. sometimes reject the null
c. reject the alternative
d. do not reject the null
Solutions
orchestra answered 2 years agoRelated Solutions
Assume a test of the null hypothesis that requires a t-test (rather than a z-test). Sample...
Assume a test of the null hypothesis that requires a t-test
(rather than a z-test). Sample size is 25 and alpha is .05. Which
of the following would be appropriate critical t values for a
2-tailed test and a one-tailed test, respectively, of the null
hypothesis?
Question 21 options:
a)
+2.064, + 1.711
b)
+2.064, +1.711
c)
+2.064, +1.711
d)
+2.064, + or - 1.711
If I calculate a z test statistic of 4.84, and my α=0.05, what decision should I...
If I calculate a z test statistic of 4.84, and my
α=0.05, what decision should I make about the hypothesis?
(Calculate the p-value for a 2-sided test to make your
decision.)
Fail to reject the null hypothesis that the proportion of
American adults who voted for Obama in 2008 was 0.55.
Reject the null hypothesis that the proportion of American
adults who voted for Obama in 2008 was 0.55.
Reject the alternative hypothesis that the proportion of
American adults who...
1.What comparison is being made in a hypothesis test? a.Research results from a population and a...
1.What comparison is being made in a hypothesis test?
a.Research results from a population and a hypothesis about a
sample
b.Research results from a population and a hypothesis about the
population
c.Research results from a sample and a hypothesis about a
population
d.Research results from a sample and a hypothesis about the
sample
2.If a sample is given a treatment and used for a hypothesis
test, what would the null hypothesis (H0) say?
a.The treatment causes a change in the...
1) What is a hypothesis, a hypothesis test, a null hypothesis and an alternative hypothesis? 2)...
1) What is a hypothesis, a hypothesis test, a null hypothesis
and an alternative hypothesis?
2) What is a P-value, critical value and a test statistic?
Provide an example of each and describe how they are used to test
claims.
3) When conducting a hypothesis test, what is the difference
between the P-value method and the critical-value method?
4) List and explain all the steps for performing a hypothesis
test.
Directions: write the finding of these
questions in a short...
Discuss the difference between Z, t and F statistics in test of hypothesis. Which one would...
Discuss the difference between Z, t and F statistics in test of
hypothesis. Which one would be more useful to you and your
organization
Which hypothesis test you believe you should use and why. One Sample Proportion Z-test Two Sample...
Which hypothesis test you believe you should use and
why.
One Sample Proportion Z-test
Two Sample Proportion Z-test
One Mean t-test
Pooled t-test
Non-Pooled t-test
Paired t-test
ANOVA F-test
Bootstrapping is also an option
Questions:
The NOAA National Climatic Data Center of the United
States provides data on the average annual temperature for every
state in the United States. The average annual temperatures are
based on data collected by weather stations throughout each state
during the years 1971 to 2000....
1) Find the P-value for a left-tailed hypothesis test with a test statistic of z=-2.23. Decide...
1) Find the P-value for a left-tailed hypothesis test with a
test statistic of z=-2.23. Decide whether to reject the null
hypothesis (Ho) if the level of significance (alpha) equals
0.01
2) Find the P-value for a right-tailed hypothesis test with a
test statistic of z=1.82. Decide whether to reject the null
hypothesis (Ho) if the level of significance (alpha) equals
0.09
3) Find the P-value for a two-tailed hypothesis test with a test
statistic of z=2.14. Decide whether to...
consider which step of the hypothesis test procedure makes a decision on the statistical hypothesis and...
consider which step of the hypothesis test procedure makes a
decision on the statistical hypothesis and which step determines
the substantive nature of the results of the hypothesis test?
Suppose that you wish to use a hypothesis test to test a claim made by a...
Suppose that you wish to use a hypothesis test to test a claim
made by a juice bottling company regarding the mean amount of juice
in its 16 oz bottles. The company claims that the mean amount of
juice in its 16 oz bottles is 16 oz, while you suspect the true
mean is lower. You obtain n = 15 bottles of juice and find a sample
mean of x¯ = 15.42 oz with a sample standard deviation of s...
If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will...
If you use a 0.05 level of significance in a two-tail
hypothesis test, what decision will you make if ZSTAT=+1.55?
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