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4.If the is 5.3, based on past research, and you want to construct a 97% C.I., what’s your point estimate of ?
A.61.17B.30C.5.4D..968E.655.If the is 5.3, based on past research, and you want to construct a 97% C.I., what’s your value for*z?
6.If the is 5.3, based on past research, and you want to construct a 97% C.I., what’s your xvalue?7.If the is 5.3, based on past research, and you want to construct a 97% C.I., what’s the margin of error?8.Based on past research, you know is 5.3. What is the 97% confidence interval for the population mean?A.(59.07, 63.27)B.(60.20, 62.14)C.(65, 69.4)D.(40,60)E.(60,65)9.A teacher administers a standardized math test to his class of 75 students. The mean score (out of 300 possible points) is 235. From previous studies, you know the population standard deviation is 28. Using the sample data given, calculate a 95% confidence interval for the population mean.10. A teacher administers a standardized math test to a random sample of students. From previous studies, you know the population standard deviation is 28. The principal has decided that she wants to estimate the average score to within 4 points with 99% confidence. How large should the sample be to achieve the desired margin of error and confidence level?11. You compute a 99% C.I. with sample of size M and a margin of error of + or – 5 units. You now wish to compute a 90% C.I. with the same margin of error with a sample of size P.
For this situation,
which of the following is true?