7. The average test score in 2020 of a Standardized English Exam was 600 with a population standard deviation (population) of 80. Find Lowest Test Score x which is in the 81* Percentile. An Independent Education Research team desires to estimate the population mean GPA , µ, of Ball College for the year 2020. The sample mean was 3.2. Assume a population standard deviation of 1.5 (o ). Answer Questions 8-10. 8. A sample of 100 students was take at random. Find the 99% Confidence Interval for µ and interpret vour results. 9. Suppose o is not given and n= 29 students were selected at random. Assume s = 1.8. Find the 90% confidence Interval for µ and Interpret your results. 10.. Suppose o is not given and n= 29 students were selected at random. Assume s= 1.8. Find the 95% confidence Interval for µ and Interpret your results.

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7. The average test score in 2020 of a Standardized English Exam was 600 with a population
standard deviation (population) of 80. Find Lowest Test Score x which is in the 81"
Percentile.
An Independent Education Research team desires to estimate the population mean GPA , µ, of
Ball College for the year 2020. The sample mean was 3.2. Assume a population standard
deviation of 1.5 (0 ). Answer Questions 8-10.
8. A sample of 100 students was take at random. Find the 99% Confidence Interval for µ and
interpret your results.
9. Suppose o is not given and n= 29 students were selected at random. Assume s = 1.8. Find the
90% confidence Interval for µ and Interpret your results.
10.. Suppose o is not given and n=29 students were selected at random. Assume s= 1.8. Find
the 95% confidence Interval for µ and Interpret your results.
Transcribed Image Text:7. The average test score in 2020 of a Standardized English Exam was 600 with a population standard deviation (population) of 80. Find Lowest Test Score x which is in the 81" Percentile. An Independent Education Research team desires to estimate the population mean GPA , µ, of Ball College for the year 2020. The sample mean was 3.2. Assume a population standard deviation of 1.5 (0 ). Answer Questions 8-10. 8. A sample of 100 students was take at random. Find the 99% Confidence Interval for µ and interpret your results. 9. Suppose o is not given and n= 29 students were selected at random. Assume s = 1.8. Find the 90% confidence Interval for µ and Interpret your results. 10.. Suppose o is not given and n=29 students were selected at random. Assume s= 1.8. Find the 95% confidence Interval for µ and Interpret your results.
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