Statistics in Psychology SPSS Assignment #2 Carlton Spring 2021 Directions: This assignment is designed for you to practice: 1) choosing the appropriate statistical technique to answer different...

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You told me to upload my spss in a seperate ticket then my final. It is due at 11:59pm EST today


Statistics in Psychology SPSS Assignment #2 Carlton Spring 2021 Directions: This assignment is designed for you to practice: 1) choosing the appropriate statistical technique to answer different research questions, and 2) running different statistical analyses in SPSS. This is an INDIVIDUAL assignment. Although you can consult with your teammates, everyone should hand in their own individual assignment, which should be qualitatively different from your peers! There are three research problems below, using variables from the HSData.sav dataset, which can be found on Canvas. This data file contains 200 observations from a sample of high school students with demographic information about the students (gender, socio-economic status, ethnic background) as well as their scores on standardized tests of reading, writing, mathematics, and social studies. Please complete the full NHST process for any TWO of the problems below, including all of the following information: a. The appropriate test for evaluating the research question. b. What variable you used as an IV, and which as the DV. c. The measurement type (Nominal, Ordinal, or Scale) of each variable. If the variable is Nominal, please list the categories and what number indicates membership in these categories. d. Means, standard deviations, and graphs of the dependent variable (using the EXPLORE command in SPSS). e. Null/Alternative hypotheses. f. Alpha level, degrees of freedom (if appropriate), one/two tailed test type (if appropriate), other information as appropriate. g. Appropriate test statistic/table, as a copied and pasted/screenshot/table of SPSS result, including post hoc tests if appropriate. h. A full write up for step four, including: a. A decision about the null hypothesis b. A written explanation about the results of the test, including means and standard deviations, and a final answer to your research question c. Proper APA style string, including effect size and confidence intervals, if appropriate. Each problem you complete is worth 25 points. You can complete the third research problem for an additional 10 points of extra credit. If you choose to complete all three, please indicate what problem you would like counted for extra credit – otherwise, I will automatically treat the third problem as extra credit. Problems: 1) You would like to see if there is a significant difference in writing scores based on the student’s socio-economic status. Test this hypothesis using the variables “write” and “ses”. 2) You would like to see whether students’ test grades in science change between freshman and senior year. Test whether or not there is a significant difference in science scores between these two time points using the variables “sciencefresh” and ‘sciencesen”. 3) You would like to know if student’s science scores as freshman predict how well they perform in math during their senior year. Use the variables “math” and “sciencefresh”.
Answered Same DayMay 05, 2021

Answer To: Statistics in Psychology SPSS Assignment #2 Carlton Spring 2021 Directions: This assignment is...

Atreye answered on May 05 2021
143 Votes
Problem 1:
(a)
The objective of the problem is to check whether there is any significant difference exists in writing scores between the three level of student’s socio economic status or not. The appropriate test here is One-way ANOVA. One –way ANOVA is a statistical method to check whether there is any significant diff
erence between the two or more independent groups or not.
(b)
In this problem, the independent variable is Student’s socio-economic status(ses).
The dependent variable is student’s writing score.
(c)
The independent variable student’s socio-economic status is a nominal variable as it can be categorized in to three section.
It has three categories namely-“low”, ”middle”, high”.
From the variable view tab in SPSS, it can be viewed which number is indicating which category.
1 is representing low category.
2 is representing middle category.
3 is representing high category.
The dependent variable student’s writing score is a scale variable as it is a numerical variable.
(d)
The following steps are used to obtain the descriptive statistics and graphs.
· Go to Analyze>Descriptive Statistics>Explore.
· Select “writing score” variable in dependent List.
· Click Plots and choose Histogram. Click Ok.
Output obtained from SPSS:
(e)
The null hypothesis is that there is no significant difference between the two specified populations where the alternative hypothesis is that there is significant difference between the two specified populations.
Here, the appropriate null and alternative hypothesis is:
there is no significant difference in student’s writing score between student’s socio economic status.
there is significant difference present in student’s writing score between student’s socio economic status.
(f)
The level of significance that is alpha level is considered as 0.05.
The degrees of freedom is:
For the socio-economic factor, the degrees of freedom obtained as 2.
For error, the degrees of freedom are 197.
This is two tailed test as we are testing on both sides, greater and less both sides.
(g)
Follow the steps to perform One way Anova.
· Go to Analyze>Generalized Linear Model>Univariate.
· Select writing score in dependent list and ses in factor.
· Click Post Hoc and check LSD and Tukey.
Output obtained from SPSS:
(h)
a.
The null hypothesis is rejected as the p-value corresponding to “ses” is obtained as 0.008 which is less than the level of significance 0.05.
b.
The mean of writing score is 52.7750 and standard deviation of writing score is 9.47859.
From the histogram, it can be seen that the curve has a longer tail towards it’s left side which implies that the data is negatively skewed.
From the boxplot, it is observed that the distance between second quartile and median is larger than the distance between third quartile and median, which implies it is left skewed.
From the ANOVA output, the F test statistic value corresponding to “ses” is 4.970.
It can be concluded based on the result of the test is that student’s writing score change with their socio-economic status.
As the null hypothesis is rejected, so further post Hoc tests are performed to check in which pair, student’s writing score differ.
LSD:
From the LSD...
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