Statistics
What percentage of college students are attending a college in the state where they grew up? Let p be the proportion of college students from the same state as that in which the college resides. If no preliminary study is made to estimate p, how large a sample is needed to be 90% sure that the point estimate (p hat) will be within a distance of 0.07 from p?

Try this formula:
n = [(zvalue)^2 * p * q]/E^2
= [(1.645)^2 * .5 * .5]/0.07^2
= ? (round to the next highest whole number)
I'll let you finish the calculation.
Note: n = sample size needed; .5 for p and .5 for q are used if no value is stated in the problem. E = maximum error, which is 0.07 in the problem. Zvalue is found using a ztable (for 90%, the value is 1.645).
I hope this will help get you started.posted by MathGuru

r=.96 between craving for pizza and ability to concentrate on studying
posted by carla

139
posted by Jordan
Respond to this Question
Similar Questions

statistics
In a random sample of 112 State College students, 41 students reported being current smokers. a) Calculate the 95% confidence interval for the proportion of State College students who smoke. 
statistics
In a random sample of 112 State College students, 41 students reported being current smokers. a) Calculate the 95% confidence interval for the proportion of State College students who smoke. 
Micro Econ
Which of the following is a question answered with normative economic reasoning? A.If the college offers free textbooks for students, will more students read their textbooks? B.If the college provided less financial aid for 
Statistics
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population 
MathStatistics
A marketing research company needs to estimate which of two soft drinks college students prefer. A random sample of n college students produced the following 98% confidence interval for the proportion of college students who 
college
Do students at various colleges differ in how sociable they are? Twentyfive students were randomly selected from each of three colleges in a particular region and were asked to report on the amount of time they spent socializing 
Statistics
How do you find the pvalue??? Thanks! In the past, 35% of the students at ABC University were in the Business College, 35% of the students were in the Liberal Arts College, and 30% of the students were in the Education College. 
statistics
Do students at various colleges differ in how sociable they are? TwentyFive students were randomly selected from each of three colleges in a particular region and were asked to report on the amount of the time they spent 
math
a college conducted a survey and determined that 68% of the students attending the college owned a car.what is the ratio of the number of students who own cars to total numbers of students 
College Algebra
The principal is $25,000. This is P. Research the annual interest rate for your investment. This is r. State the time in years for the investment (as in when the new grandchild will be attending college). This is t. State the