Question
In: Statistics and Probability
When computing a t-test, it is important to distinguish between directional and nondirectional hypotheses as the...
When computing a t-test, it is important to distinguish between directional and nondirectional hypotheses as the direction will determine the rejection regions. Describe how the rejection regions would differ according to the type of hypothesis you would use.
An insurance company asks you to determine whether older drivers are safer than younger ones. Provide a directional hypothesis related to this study. Then, explain how you would need to change the hypothesis so that it would be nondirectional. What happens to the rejection regions and why? Which of the two hypotheses do you think is more appropriate and why?
Solutions
orchestra answered 1 year agoRelated Solutions
Explain the difference between non-directional and directional hypotheses, and explain in which circumstances it is important...
Explain the difference between non-directional and directional
hypotheses, and explain in which circumstances it is important to
apply directional hypothesis.
Explain why Chi square distributions are positively skewed and
what is its relationship with the degrees of freedom.
The objective of hypothesis testing is to reject the null
hypothesis. How do we use the P-value to accomplish this goal?
Describe the difference between One-way versus Two-way ANOVA
and provide an example of each.
Detail the steps in computing the Paired t-test with a brief discussion specific to the important...
Detail the steps in computing the Paired t-test with a brief
discussion specific to the important aspects of each step.
1. When would it be important to distinguish between the incidence of a specific disease or...
1. When would it be important to distinguish between the
incidence of a specific disease or condition in your patient
population (any patient population) and the prevalence of the
disease/condition.
2. What is the sensitivity and specificity of a diagnostic test
used to make diagnoses for your patient population (used in #1) ?
Discuss the implications of the values you present.
FOR THE SCENARIO BELOW...I need to know if my hypotheses are directional or non-directional.(I already have...
FOR THE SCENARIO BELOW...I need to know if my hypotheses are
directional or non-directional.(I already have the
hypotheses)
I know I need to use a two sample T test but need help with
the calculations. (Provide a sample size and critical values in
relation to the hypothesis.)
-Discuss what the statistical analysis will do in answering
the hypotheses and question(s) for the client. Also discuss any
potential problems to watch out for, including an appropriate
sample size to meet the...
Use the t-distribution and the sample results to complete the test of the hypotheses. Use a...
Use the t-distribution and the sample results to
complete the test of the hypotheses. Use a 5% significance level.
Assume the results come from a random sample, and if the sample
size is small, assume the underlying distribution is relatively
normal.
Test H0 : μ=100 vs Ha : μ<100 using the sample results x¯=91.7,
s=12.5, with n=30.
Describe the kind of data that are collected for an independent-measures t test and the hypotheses...
Describe the kind of data that are collected for an
independent-measures t test and the hypotheses that the test
evaluates. The key to helping formulate your explanation would be
to include the assumptions of this statistical model, the type of
sample used in this model, and a statement about the null
hypothesis.
Describe the kind of data that are collected for an independent-measures t test and the hypotheses...
Describe the kind of data that are collected for an
independent-measures t test and the hypotheses that the test
evaluates. The key to helping formulate your explanation would be
to include the assumptions of this statistical model, the type of
sample used in this model, and a statement about the null
hypothesis.
Describe the kind of data that are collected for an independent-measures t-test and the hypotheses that...
Describe the kind of data that are collected for an
independent-measures t-test and the hypotheses that the test
evaluates. The key to helping formulate your explanation would be
to include the assumptions of this statistical model, the type of
sample used in this model, and a statement about the null
hypothesis.
Find the difference between the two groups when using a dependent t-test then find the independent two-sample t-test
data =
X1= 14, 8, 6, 14, 20, 13, 9, 12
x2= 13, 4, 1, 8, 10, 12, 8, 6
1. Find the difference between the two groups when using
a dependent t-test then find the independent
two-sample t-test, and compare the results with those from
the dependent t-test
What is the difference between a Paired t-test and a Pooled t-test?
What is the difference between a Paired t-test and a Pooled
t-test?
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