Answer the three listed questions below the data Many people take ginkgo supplements advertised to improve memory. Are these over-the-counter supplements effective? In a study, elderly adults were assigned to the treatment groupor control group. The 104 participants who were assigned to the treatment group took 40 mg oginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took aplacebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale wasadministered. Higher scores indicate better memory function. Summary values are given in thefollowing table:NGinkgo1045.70.6Placebo1155.50.5Perform the appropriate test to determine if taking 40mg of ginkgo 3 times a day is effective inincreasing mean performance on the Wechsler Memory Scale.> Is the study observational or designed experiment?> Can you conclude association or causation with this type of study?Is this a matched-pair dependent test or two-sample independent test?

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Description: Answer the three listed questions below the data Many people take ginkgo supplements advertised to improve memory. Are these over-the-counter supplements effective? In a study, elderly adults were assigned to the treatment groupor control group. The

The variable is taking a pill 3 times a day for 6 weeks. There are two groups which are treatment group and control group. Here, we have to test whether the taking 40 mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale or not. The test is right-tailed test.Null hypothesis: There is no difference between the two groups. Alternative hypothesis: Taking 40 mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale. From t-distribution table, at 201 d.f and 0.05 level, the critical value is 1.653.The value of the test statistic is t = 2.66.Conclusion: Use a significance level, α= 0.05. Here the value of the test statistic 2.66, which is greater than the critical value 1.653. That is,t(=2.66)>1.653. Therefore, by the rejection rule, reject the null hypothesis. Interpretation: There is sufficient evidence at level of significance α= 0.05. Taking 40 mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale. The study is designed experiment. We can conclude that causation with this type of study. This is a two-sample independent test.

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Many people take ginkgo supplements advertised to improve memory. Are these over-the- counter supplements effective? In a study, elderly adults were assigned to the treatment group or control group. The 104 participants who were assigned to the treatment group took 40 mg c ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale wa administered. Higher scores indicate better memory function. Summary values are given in th following table: Ginkgo 104 5.7 0.6 Placebo 115 5.5 0.5 Perform the appropriate test to determine if taking 40mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale. > Is the study observational or designed experiment? > Can you conclude association or causation with this type of study? Is this a matched-pair dependent test or two-sample independent test?

Many people take ginkgo supplements advertised to improve memory. Are these over-the- counter supplements effective? In a study, elderly adults were assigned to the treatment group or control group. The 104 participants who were assigned to the treatment group took 40 mg c ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale wa administered. Higher scores indicate better memory function. Summary values are given in th following table: Ginkgo 104 5.7 0.6 Placebo 115 5.5 0.5 Perform the appropriate test to determine if taking 40mg of ginkgo 3 times a day is effective in increasing mean performance on the Wechsler Memory Scale. > Is the study observational or designed experiment? > Can you conclude association or causation with this type of study? Is this a matched-pair dependent test or two-sample independent test?

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Answer the three listed questions below the data

Many people take ginkgo supplements advertised to improve memory. Are these over-the-
counter supplements effective? In a study, elderly adults were assigned to the treatment group
or control group. The 104 participants who were assigned to the treatment group took 40 mg o
ginkgo 3 times a day for 6 weeks. The 115 participants assigned to the control group took a
placebo pill 3 times a day for 6 weeks. At the end of 6 weeks, the Wechsler Memory Scale was
administered. Higher scores indicate better memory function. Summary values are given in the
following table:
N
Ginkgo
104
5.7
0.6
Placebo
115
5.5
0.5
Perform the appropriate test to determine if taking 40mg of ginkgo 3 times a day is effective in
increasing mean performance on the Wechsler Memory Scale.
> Is the study observational or designed experiment?
> Can you conclude association or causation with this type of study?
Is this a matched-pair dependent test or two-sample independent test?

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