Blog

Draw a scatterplot depicting the X and Y scores.  Be sure to include the scatterplot with your calculations on notebook paper.  

WORD PROBLEM #2 Researchers examined the relationship between severity of positive symptoms and density of dopamine receptors in schizophrenic patients.  Severity of positive symptoms (X scores) was coded in categories with 1 = mild and 12 = severe.  Density (Y scores) was recorded in molarity as the total number of functional dopamine receptors in the brain. For the following data, compute the Pearson correlation and determine if there is a relationship between positive symptoms and dopamine receptor density.             Participant ID Symptoms (X) Receptor density (Y) A 8 3 B 7 6 C 7 5 D 6 5 E 12 6  

Be sure to include the following in your calculations on notebook paper: draw your distribution  correctly label the horizontal axis shade the critical area place an asterisk on the distribution where the chi square score is located. 

What is the Sum of Squares (SS) for the nicotine-free vapes group?

What is the Sum of Squares (SS) for the Nicorette group?

Be sure to include the following in your calculations on notebook paper: draw your distribution  correctly label the horizontal axis  shade the critical area place an asterisk on the distribution where the t-score is located. 

What is the sample mean (M) for nicotine-free vapes group?

WORD PROBLEM #4 Use the following set of sample data to answer the next 4 questions. X 1 3 5 7 8 9 9                    

WORD PROBLEM #3 The following data are from an independent-measures experiment comparing two treatment conditions for a smoking cessation program. Two different types of treatments were tested with some participants in the Nicorette group (i.e., nicotine gum) and the rest of the participants were in the nicotine free vaping group.  Do these data indicate participants using Nicorette differ from participants using nicotine free vapes? Use a two-tailed test with

Look at the distribution for this word problem and determine if X =98 is a score that is noticeably different from the mean.  In your answer indicate yes or no and then explain why you selected your answer (i.e., back up with reasoning from facts learned in this class).