4. Scores. Scores for a qualification exam are normally distributed, with a mean of 80 and a standard deviation of 10. T

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4 Scores Scores For A Qualification Exam Are Normally Distributed With A Mean Of 80 And A Standard Deviation Of 10 T 1 (37.92 KiB) Viewed 18 times

4. Scores. Scores for a qualification exam are normally distributed, with a mean of 80 and a standard deviation of 10. To be qualified for an interview, you must score in the top 10%. What is the lowest score you can earn and still be qualified for an interview? 5. Coffee temperatures. You randomly select 25 coffee shops and measure the temperature of coffee sold at each. The sample mean temperature is one-hundred sixty-two degrees F with a sample standard deviation of 8.0 degrees F. Find the 95% confidence interval for the mean temperature. Assume the temperatures are approximately normally distributed.