These 3 questions need to be answered please. I can provide the data set when necessary.
Question 1:
1.) During a TYPICAL MONTH of school, how often do you skip class?
1: Never 2: Rarely 3: Sometimes 4: Often 5: Almost Always
i. Construct a histogram of the numerical responses for each of the first, second, third and
fourth years. For each histogram, identify which response is the most frequent and
identify and differences or similarities you observe.
ii. Perform at the 5% significance level the one-way ANOVA test to compare the
population means for each of the 4 years of data. Should we reject or not reject the
claim that there is no difference in population means between each year?
Question 2: Is there a linear relationship between frequency of skipped classes and grade average?
Consider the data in columns C-F which provide grade average in years 1-4 respectively and the
data on how often classes are skipped that you worked with in Questions 1 and 2.
a) Use Excel to find the correlation coefficient for average and classes skipped for each
of the four years.
b) Identify the year that has the strongest linear relationship. Using the data for this
year, use Excel to obtain a full regression analysis including a scatter plot with
regression line plotted, regression line equation, coefficient of determination. (Hint:
Use classes skipped as the explanatory variable.)
c) Based on the correlation coefficient and the analysis in b), do you feel that
frequency of classes skipped is a good predictor of grade average for this year?
Explain by making reference to relevant numerical measures where appropriate.
Question 3: We will now look at whether or not a relationship exists between grade average in third and
fourth year.
a) Use Excel to find the correlation coefficient for this data.
b) Use Excel to obtain a full regression analysis as in #2 b) above. (Hint: Use average in
third year as explanatory variable.)
c) Test the claim that there is a positive linear correlation between the two sets of
grades at a 0.01 level of siginficance
Solved by F. J. in 28 mins