The mean body mass index bmi for boys age 12 is 236 an

Assignment Help Other Subject

Reference no: EM13455343

1. The mean body mass index (BMI) for boys age 12 is 23.6. An investigator wants to test if the BMI is higher in 12-year-old boys living in New York City. How many boys are needed to ensure that a two-sided test of hypothesis has 80% power to detect a difference in BMI of 2 units? Assume that the standard deviation in BMI is 5.7.

Alpha = ________
Z1-α/2= ________
Z1-β= ________
ES = ________
n= ________

2. An investigator wants to estimate caffeine consumption in high school students. How many students would be required to estimate the proportion of students who consume coffee? Suppose we want the estimate to be within 5% of the true proportion with 95% confidence.

Alpha = ________
Z= ________
p= ________
Effect Size = ________
n=________

3. A crossover trial is planned to evaluate the impact of an educational intervention program to reduce alcohol consumption in patients determined to be at risk for alcohol problems. The plan is to measure alcohol consumption (the number of drinks on a typical drinking day) before the intervention and then again after participants complete the educational intervention program. How many participants would be required to ensure that a 95% confidence interval for the mean difference in the number of drinks is within 2 drinks of the true mean difference? Assume that the standard deviation of the difference in the mean number of drinks is 6.7 drinks.

Z= ________
s= ________
Effect Size = ________
n=________

Reference no: EM13455343

Questions Cloud

Times new roman 12 brief history on scientologymajor : times new roman 12 brief history on scientologymajor beliefs and a attempt to identify at least one problem this group

Research the cultural customs like dance music theater and : select two countries where spanish is the predominant language to serve as the basis for the learning team assignments

Write down a 700- to 1050-word paper on the cultural : select two countries where spanish is the predominant language to serve as the basis for the learning team assignments

Sociologists cite the weakening of the family as one of the : sociologists cite the weakening of the family as one of the causes for some of the problems that american society faces

The mean body mass index bmi for boys age 12 is 236 an : 1. the mean body mass index bmi for boys age 12 is 23.6. an investigator wants to test if the bmi is

In my senior year in theological seminary i engaged in the : a major source of the civil rights movement of the late 1950s and early 1960s was the revival of interest in religion

In 3 to 4 pages by using apa-style formatting describe and : in 3-4 pages using apa-style formatting discuss and give your position on the following statement human activity

Write the equation of the individual firms short-run supply : in a perfectly competitive industry every firm has identical cost structure. the short-run total cost curve of an

Determine counter arguments and provide examples of why : write a one to two 1-2 page outline in which yourestate your thesis statement and its overarching main points.

User Account

All Pages