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- What does a z-score of 3 for a data value x represent? What does a x score of -1 for a data value x represent?What type of study is this? A first-year university unit wanted to give option of online teaching to determine whether online teaching improved learning outcomes. Students were allowed to enrol into online or on-campus classes. Grades at the end of semester were compared. Select one: O Experimental O Something else O ObservationalA marketing director developed a short television commercial to improve the image of a company. The commercial was tested on 20 people. People’s attitudes about the company were measured with a questionnaire when they first came in for the experiment and then again with the same questionnaire after viewing the commercial. 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
- Calculate the measures of central tendency for the grouped data and the measures of dispersion for the grouped and ungrouped data.After computing the measures of central tendency and dispersion, interpret the results.In a 50-question midterm exam, 40 students from the subject Creative Leadership at Angeles City University have their scores recorded. Given: r = 35 Class Interval = 6 i = 6 Lowest value = 13 and Highest value = 48 Data: Number Student’s name Midterm exam score 1 Olivia 18 2 Liam 23 3 Emma 18 4 Noah 18 5 Ava 19 6 Oliver 25 7 Sophia 25 8 Ethan 19 9 Isabella 19 10 Lucas 24 11 Mia 13 12 Mason 13 13 Charlotte 26 14 Benjamin 13 15 Amelia 27 16 William 15 17 Harper 26 18 James 17 19 Evelyn 20 20 Henry 20 21 Abigail 27 22 Sebastian 27 23 Emily 22 24 Alexander 28 25 Elizabeth…p = proportion of students who drop out due to lack of economic resources A sociologist thinks that in his country the percentage of students who drop out due to lack of economic resources is different from 40%. He takes a sample of 70 student dropouts and finds that 37 of them dropped out due to lack of financial resources.Can the sociologist, with a significance level of 0.05, consider that the percentage of students who drop out due to lack of economic resources is different from 40%? Choose 1. The correct conclusion2. The correct interpretationSelect one:to)1. H0 is rejected2. With 95% confidence, it can be ensured that the percentage of those who drop out due to lack of economic resources in that country is not different from 40%, that is, the sociologist is wrongb)1. H0 is not rejected2. With 95% confidence, it can be ensured that the percentage of those who drop out due to lack of economic resources in that country is not different from 40%, that is, the sociologist is wrongc)1.…Adverse reactions of a drug used to help patients continue their abstinence from the use of alcohol have been studied in clinical trials, and the accompanying table summarizes results for digestive system effects among patients from different treatment groups. Use a 0.05 significance level to test the claim that experiencing an adverse reaction in the digestive system is independent of the treatment group. Does the drug treatment appear to have an effect on the digestive system? Click the icon to view the data on adverse reactions from treatments. Determine the null and alternative hypotheses. OA. Ho: Drug treatment and adverse effects are not independent. H₁: Drug treatment and adverse effects are independent. OB. Ho: The drug treatment results in adverse effects on the digestive system. H₁: The drug treatment does not result in adverse effects on the digestive system. OC. Ho: Drug treatment and adverse effects are independent. H₁: Drug treatment and adverse effects are not…
- A statistician changes her level of significance from .001 to .05. What impact will this change have on her risk of making a Type I and Type II error? Is the change in the level of significance a good decision? Why or why not?You want to find the prevalence of e-cigarette smoking is a given community. Which of these study designs would you use to test the hypothesis? Case-controlB. Cross-sectionalC. Cohort D. Experimental trials