Non-parametric one sample test of difference

1. 1What are you looking for?

   1. ADifferences
   2. BRelationship
2. 2What sort of data do you have?

   1. Ainterval
   2. Bratio
   3. Cordinal
   4. Dnominal
   5. E1, 2 and maybe 3
   6. F1 and 2
3. 3What am I doing?

   1. AIndependent groups
   2. BRepeated measures
4. 4Is my data normally distributed?

   1. AYes
   2. BNo
5. 5One sample Wilcox signed rank test is a [blank_start]non-parametric[blank_end] alternative method of one sample t-test, whicjh is used to test whether the location ([blank_start]median[blank_end]) of the measurement is equal to the specified value. It looks at the measures of [blank_start]central[blank_end] tendency and compares it with the target.

   1. Amedian
   2. Bnon-parametric
   3. Ccentral
6. 6the median is the midpoint of the [blank_start]distribution[blank_end]: 50% below, 50% above

   1. Adistribution
7. 7null hypothesis: [blank_start]median[blank_end] =some value, m

   1. Amedian
8. 8median > m (one - sided hypothesis)
   median [blank_start]<[blank_end] (one - sided hypothesis)
   Alternative hypothesis: median [blank_start]not equal[blank_end] to m

   1. Anot equal
   2. B<
9. 9Wilcoxon signed rank test is calculated by six steps:
   1 . To calculate the [blank_start]difference[blank_end] between each observation and the interest value, 100 mg/dl
   2. You should exclude any difference = 0
   3. To classify and order (ranking) differences by magnitude, not taken into account the sign
   4. Sum the rankings of positive differences
   5. sum the rankings of negative differences
   6. Select the smallest of these sums and call it [blank_start]T[blank_end]
   
   this T value is search in the critical values table from Wilcoxon signed rank test. We can read the table in the row corresponding to difference non-zero. Each row has ranges different of values corresponding to different p-values
   - If the T-values is out of range of the column of exactly equal at one of range - values corresponding to different p-values. If the T-values is out of range of the column or exactly equal at one of range - values ,the p-value is less that corresponding to the column
   It the t-value is between the values of range, p-value is higher that corresponding to the column

   1. AT
   2. Bdifference
10. 10spss generates a p value for us and in order to reject the null hypothesis this value needs to be less than 0.05

    1. ATrue
    2. BFalse

11. 11To report a one-sample Wilcoxon rank test in APA format you need to know only the [blank_start]p value[blank_end]
    e.g The analysis demonstrated that the sample was significantly different from the population (p=0.007)

    1. Ap value
12. 12What does a one sample Wilcoxon signed ranks test do?

    1. ACompares the means of two related samples
    2. BCompares the mean of a sample to a known population mean
    3. CCompares the median of two independent samples
    4. DCompares the median of a sample to a known population median
    5. ECompares the median of several independent groups
13. 13A one sample Wilcoxon signed ranks test should be used when . . .

    1. AThe data is measured on the interval or ratio level and is not normally distributed
    2. BThe data is measured on an interval or ratio level and is normally distributed
    3. CThe data is measured on a nominal or ordinal level
    4. DThe Kolmogorov-Smirnov test on the data sample is significant
    5. ENone of the statements are correct
    6. F1 and 2
    7. G1 and 4
14. 14The advantage of the one sample Wilcoxon signed ranks test is . . .
    

    1. AThat parametric assumptions do not need to be met
    2. BThe test is very powerful
    3. CData which is prone to be non-normally distributed (e.g. reaction time, population density) can still be analysed
    4. D1 and 3
    5. EAll of the above
15. 15The median is . . .

    1. ACalculated by summing all the data points in a sample and dividing this by the total number of data points
    2. BRefers to the mid point in a distribution
    3. CIs used to make group comparisons in parametric analyses
    4. DIs used to make group comparisons in non-parametric analyses
    5. E2 and 3
    6. F2 and 4
16. 16Refer to the SPSS output above showing the results of the K-S test for the blood glucose levels of a group of patients.
    
    Select all the correct statements below

    

    1. AThe results of the Kolmogorov-Smirnov test are significant
    2. BThe blood glucose levels of the group of patients are not normally distributed
    3. CThe blood glucose levels of the group of patients are normally distributed
    4. DThe mean blood glucose levels of the data sample can be compared to the known mean blood glucose levels of the general population using a one-sample t-test
    5. E1 and 2
    6. F1 and 3
17. 17The SPSS output below shows the descriptives and results of a one sample Wilcoxon signed ranks test comparing the median blood glucose levels of a group of patients to the median blood glucose levels of the general population.
    
    Referring to the SPSS output, what is the known population median blood glucose level of the general population?

    

    1. A.001
    2. B100
    3. C7.83
    4. D170
    5. EInformation not available
18. 18Referring to the SPSS outputs above, what is the median blood glucose level of the group of patients?

    1. A100
    2. B172.25
    3. C170
    4. D225
    5. E125
19. 19Referring to the SPSS output previously shown, what can we conclude from the results of the one sample Wilcoxon signed ranks test?
    

    1. AThe blood glucose levels of the patient group does not significantly differ from the blood glucose levels of the general population
    2. BThe blood glucose levels of the general population is significantly higher than the blood glucose levels of the patient group
    3. CThe blood glucose levels of the patient group is significantly higher than the blood glucose levels of the general population
    4. DThe blood glucose levels of the patient group are significantly different to the blood glucose levels of the general population
    5. E3 and 4
    6. FNone of the statements are correct
20. 20Using the SPSS outputs above, what information do you need to report the results of a one sample Wilcoxon signed ranks test?

    1. AThe number of participants, the Wilcoxon value and the p value
    2. Bdegrees of freedom and the p value
    3. CThe Wilcoxon value and the p value
    4. DOnly the p value
    5. ENone of the statements are correct

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MY DEGREE Quiz on Non-parametric one sample test of difference , created by Toyin Oshodi on 07/03/2017.

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