Mathematics, 15.04.2020 21:49, lesli8178
Fifty students are enrolled in an Economics class. After the first examination, a random sample of five papers was selected. The grades were 60, 70, 75, 80, 90.
a. Calculate the estimate of the standard error of the mean.
b. What assumption must be made before we can determine an interval for the mean grade of all the students in the class? Explain why?
c. Assume the assumption of part(b) is met. Provide a 90% confidence interval for the mean grade of all the students in the class.
d. If there were 200 students in the class, what would be the 90% confidence interval for the mean grade of all the students in the class
Answers: 3
Mathematics, 21.06.2019 20:00, janeriaw188
Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line
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Mathematics, 21.06.2019 20:30, janeou17xn
Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?
Answers: 1
Mathematics, 21.06.2019 20:30, stgitskaysie9028
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Answers: 3
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