Mathematics, 24.06.2019 11:30 jbuchjr13
Arecent survey concluded that the proportion of american teenagers who have a cell phone is 0.27. the true population proportion of american teenagers who have a cell phone is 0.29. for samples of size 1,000 that are selected at random from this population, what are the mean and standard deviation, respectively, for the sampling distribution of the sample proportion of american teenagers who have a cell phone?
Answers: 2
Mathematics, 22.06.2019 02:20, LillySchool6529
Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?
Answers: 3
Arecent survey concluded that the proportion of american teenagers who have a cell phone is 0.27. th...
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