I need help with question 8, 9, 10, and 11 please as soon as possible. ads/MAT_1

Question

I need help with question 8, 9, 10, and 11 please as soon as possible.

ads/MAT_103_Test 2.pdf default Res % It has been claimed that at UCLA at least 40% of the students live on campus. Fro Chro sample of 250 students, 90 live on campus. Does the evidence support this claim at -001 S, Joan moves into her new apartment and wants to purchase a new couch. She wants to determine if there is any difference between the average costs of couches at two different stores. Test the hypothesis that there is no difference at -005 . Assume the population of couches is normally distributed Store 1 $650 Store 2 $61 n 24 $730 $78 21 b. A resparcher wishes to determine if there is a relationship between the sex of an individual and the amount of coffee consumed. The following data was obtained for the number of cups of coffee consumed. Are the sex of the drinker and the amount of coffee independent events ? Use -0.05 Low Medium High Males 6 13 Females 12 1 25 An anatomy teacher hypothesizes that the final grades in her class are distributed as 10% A's, 23% B's, 45% C's, 14% D's, and 8% F's. If at the end of the semester she has the following grades was she correct in her hypothesis? Use -005 A B C D F 6 14 22 8 4 6. A quality control expert wants to estimate the proportion of defective components that are being manufactured by his company to within 2.5%. A sample of 300 components showed that 20 were defective. How large a sample is needed to estimate the true proportion of defective components with 99% confidence?

Explanation / Answer

Answer to the question is as follows:

9. P(Z<z) = .85

Z = 1.035 as per the Z tables.

10.

P(1.5<Z<2.5) = ?

P(1.5<Z<2.5) = P(Z<=2.5) - P(Z<=1.5) = .9938-.9332 = .0606

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

---