1.For a study, a chi-square statistic of 4.120 was calculated. There were 12 participants in total, and 2 degrees of freedom for the first variable and 3 degrees of freedom for the second variable. What is the effect size?

Question 7 options:

a.0.172

b.0.563

c.0.414

d.0.817

2.Researchers wanted to determine which type of exercise would be most effective in weight loss. Forty-five people were randomly assigned to either cardio, weightlifting, H.I.I.T exercise programs to be performed for 1 month. After the amount of weight lost was measured. The independent variable for this study is:

a.Weight loss

b.Cardio exercise

c.Exercise type

d.H.I.I.T exercise

3.A dentist notices that about 70% of his patients need a root canal. Based on this information, he concludes that 70% of the world population must also need a root canal. However, this study lacks _____ due to his biased sample.

a.Expected relative-frequency probabilities

b.Generalizability

c.Reliability

d.Convenience sampling

5.Researchers reported that dogs atFluffy Rescuewere more likely to get adopted within their first week of being listed as available if they weigh less than 30 lb. As one example, they reported that 31 dogs weighing less than 30 lb were adopted within one week of being available for adoption whereas 15 dogs weighing over 30 lb were adopted within one week of being available for adoption. The null hypothesis predicts that dogs atFluffy Rescuehave the same pattern of time until adoption as those in the general population. The research hypothesis predicts that dogs atFluffy Rescuehave a different pattern of time until adoption than those in the general population. What is/are the degrees of freedom for the chi-square test for goodness of fit?

a.16

b.45

c.1

d.6

6.For a study assessing mental health, a survey about individuals' experiences with various mental health difficulties during the pandemic was completed by respondents. Results showed that 61% of randomly selected respondents reported experiencing anxiety. If the margin of error is +/- 5.2%, what is the interval estimate for anxiety?

a.55.8% to 66.2%

b.61% to 66.2%

c.55% to 66%

d.66.2%

7.In a normal distribution what is the percentile rank that separates the top 40% from the mean?

a.20%

b.40%

c.10%

d.60%

8.What is the critical value for the chi-square statistic with a sample size of 10 and a nominal variable with 4 categories using an alpha of 0.10?

a.11.345

b.7.815

c.6.252

9.A child psychologist wanted to determine whether eating sugary cereal for breakfast increased aggression in first graders during their morning play period. After feeding a group of 20 students sugary cereal for breakfast, she observed that, on average, the students committed 4.5 aggressive behaviours during their morning play period. In this example, the descriptive statistic is:

a.All first graders who drank orange juice at breakfast

b.Aggressive behaviour score of 4.5

c.All first graders

d.The 20 students