Question

Using the 6 steps to hypothesis testing, Conduct a Z test to determine if The dosage of Ritalin has an effect on attention span.

- IV = Ritalin (10mgs vs 20mgs)
- DV = Attention span (measured in minutes)
- Given the harmful side effects conduct a Z-test at the p=.01 level.
- Mean for 10 milligram group = 12.3 minutes, Mean for 20 milligram group =13.3 minutes
- Standard error of the difference is = .6 minutes

- Write out Null and Research Hypotheses
- Use the Z test
- Significance level is p= .01 Determine the critical cutoff points.
- Calculate the Z value.
- Make a decision about Null Hypothesis: Reject or Accept
- Interpret your results.

Lastly, based on your decisions, which type of error might you be making?

Answer #1

Conduct a hypothesis test for each problem, using the
traditional method. Show the 5 steps and all work for each
hypothesis test. Be sure you select the correct test to use for
each problem.
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Question: Hypothesis Testing test the following: Hypothesis
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significance.
Sample Size is 52 (states and US territories)
Mean: 6,869 Median: 6,869 Standard Deviation: 8,100 Minimum: 569
Maximum : 45,805
Clearly state a null and alternative hypothesis. Give the value
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a. State the null and alternative hypotheses.
Ho: m = 155
Ha: m > 155
b. Provide the Statcrunch output table.
Hypothesis test results:
Variable
Sample Mean
Std. Err.
DF
T-Stat
P-value
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159.86
1.7311103
49
2.8074468...

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Conduct a test of hypothesis to reveal whether the mean
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Conduct a test of hypothesis to determine whether the mean
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manufacturer. Use the .05 significance level.

Questions D-F
d) You conduct a hypothesis test for the
population proportion. After you calculate the z test statistic,
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significance, what is your decision regarding the null hypothesis?
Choose from the following.
- Reject the null hypothesis and reject the alternative
hypothesis
- Accept the null hypothesis
- Do not reject the null hypothesis
- Reject the null hypothesis and accept the alternative
hypothesis
e) You...

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At...

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