Description
Given the following students’ test scores (95, 92, 90, 90, 83, 83, 83, 74, 60, and 50), identify the mean, median, mode, range, variance, and standard deviation for the sample. SPSS is strongly recommended for this assignment. Directions are attached and tutorials may be found here:
Write a 500-750 word summary and analysis discussing the results of your calculations.
- State your results for the sample by inserting a table from SPSS. Highlight the mean, median, mode, range, variance, and standard deviation.
- Explain which descriptive statistic is best for this data set. Why?
- Conduct a one-sample t-test and interpret the results (use a population mean of 70). Refer to the attached document for clarification.
- In what situations would this information be useful?
Prepare this assignment according to the guidelines found in the APA Style Guide
PSY-452 Data Analysis Instructions
1. Calculate descriptive statistics.
a. Using the internet, go to myapps.gcu.edu. Type in your GCU username and
password.
b. Click apps, then SPSS.
c. Click Permit Use.
d. Type in Data (from question 1).
e. Give a name to your file: click Variable View.
f. Click Analyze, then Descriptive Stats, then Frequencies.
g. Put variable in right-hand box by clicking right arrow.
h. Click Statistics – then select mean, median, mode, standard deviation, variance, and
range.
i. Click Continue, then OK.
j. Save first table to a Word document.
2. Which statistic is best? Normally, the mean is best if you have a normal distribution (mean,
median, and mode are the same). If any one of those stats is different, then you have a
skewed distribution, which means the median is best in this case. (See Ch. 13)
3. Calculate a one-sample t.
a. Click Analyze, then Means, then One-Sample t.
b. Put variable in right-hand box.
c. Type in 70 as the test value.
d. Click OK.
e. Save data to a Word document.
f. Remember that, if an alpha of .05 is selected, then the p value must be less than .05.
4. One sample t tests compare the sample mean to a population mean, to see if the sample varies
dramatically from the population.
© 2020. Grand Canyon University. All Rights Reserved.
Purchase answer to see full
attachment
1. Calculate descriptive statistics.
a. Using the internet, go to myapps.gcu.edu. Type in your GCU username and
password.
b. Click apps, then SPSS.
c. Click Permit Use.
d. Type in Data (from question 1).
e. Give a name to your file: click Variable View.
f. Click Analyze, then Descriptive Stats, then Frequencies.
g. Put variable in right-hand box by clicking right arrow.
h. Click Statistics – then select mean, median, mode, standard deviation, variance, and
range.
i. Click Continue, then OK.
j. Save first table to a Word document.
2. Which statistic is best? Normally, the mean is best if you have a normal distribution (mean,
median, and mode are the same). If any one of those stats is different, then you have a
skewed distribution, which means the median is best in this case. (See Ch. 13)
3. Calculate a one-sample t.
a. Click Analyze, then Means, then One-Sample t.
b. Put variable in right-hand box.
c. Type in 70 as the test value.
d. Click OK.
e. Save data to a Word document.
f. Remember that, if an alpha of .05 is selected, then the p value must be less than .05.
4. One sample t tests compare the sample mean to a population mean, to see if the sample varies
dramatically from the population.
© 2020. Grand Canyon University. All Rights Reserved.
Purchase answer to see full
attachment
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