A psychologist wants to demonstrate the effectiveness of ACT therapy for the treatment of depression. 30 people who were seeking treatment for depression asked to complete the Beck depression inventory (BDI) before the first sessionof therapy and again after one month of therapy. Which statistical test would be best to determine if there is a significant difference between measures? One sample t-test Dependent samples t-test Independent samples t- test ANOVA

Explain the difference between a Type I error and a Type II error.   Explain the connection between the significance level and a Type I error.

I need help finding the test statistic  (part b) and finding the p-value (part c)

Given the data below, what is the calculated test statistic?   Placebo Medication 1 Medication 2 3 4 9 1 3 7 3 5 8 2 5 11 4 4 9 3     SS1 = 5.33 SS2 = 2.8 SS3 = 8.8 T1 = 16 T2 = 21 T3 = 44 n1 = 6 n2 = 5 n3 = 5     ∑X2 = 53 Do you reject the null?      Yes     No   Was there a treatment effect for type of medication on number of anti-anxiety symptoms?     Yes     No

Which of the following is NOT a misuse of​ statistics?Choose the correct answer below.A.Utilizing valid statistical methods and correct sampling techniquesB.Concluding that a variable causes another variable because they have some correlationC.Misleading graphsD.Making conclusions about a population based on a voluntary response sample

What are the values for SS and variance for the following sample of n = 3 scores? Sample:  8, 5, 2

A homeless shelter program wants to know if receipt of job training program (yes, no) is related to program satisfaction (measured on a multi-item, Likert scale ).  What type of statistical test should be used?   Group of answer choices Independent t-test Dependent t-test ANOVA Correlation Analysis Chi Square

Acne is a common skin disease that affects most adolescents and can continue into adulthood. A study compared the effectiveness of three acne treatments and a placebo, all in gel form, applied twice daily for 12 weeks. The study's 517 teenage volunteers were randomly assigned to one of the four treatments. Success was assessed as clear or almost clear skin at the end of the 12 week period. The results of the study can be seen in the table below. Using the appropriate statistical test, determine if there is significant evidence that the four treatments perform differently. If so, how do they compare.