Suppose a recent poll shows that 40% of americans drink soda every day. amy, a researcher at a local university, takes a random sample of 22 americans. let x represent the number of americans in amy's sample who drink soda every day. let μ and σ represent the parameters of a normal distribution and let n and p represent the parameters of a binomial distribution the sampling distribution of x is exactly binomial with n 22 and p - 0.4 o exactly normal with μ = 8.8 and σ = 2.298. approximately normal with μ = 0.4 and σ 0.104. almost exactly binomial with n = 22 and p = 0.4

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?