A psychology professor assigns letter grades on a test according to the followin

Question

A psychology professor assigns letter grades on a test according to the following scheme. A: Top 5% of scores B: Scores below the top 5% and above the bottom 60% C: Scores below the top 40% and above the bottom 22% D: Scores below the top 78% and above the bottom 7% F: Bottom 7% of scores Scores on the test are normally distributed with a mean of 72.8 and a standard deviation of 9.4 . Find the numerical limits for a C grade. Round your answers to the nearest whole number, if necessary. A psychology professor assigns letter grades on a test according to the following scheme. A: Top 5% of scores B: Scores below the top 5% and above the bottom 60% C: Scores below the top 40% and above the bottom 22% D: Scores below the top 78% and above the bottom 7% F: Bottom 7% of scores Scores on the test are normally distributed with a mean of 72.8 and a standard deviation of 9.4 . Find the numerical limits for a C grade. Round your answers to the nearest whole number, if necessary. A psychology professor assigns letter grades on a test according to the following scheme. A: Top 5% of scores B: Scores below the top 5% and above the bottom 60% C: Scores below the top 40% and above the bottom 22% D: Scores below the top 78% and above the bottom 7% F: Bottom 7% of scores Scores on the test are normally distributed with a mean of 72.8 and a standard deviation of 9.4 . Find the numerical limits for a C grade. Round your answers to the nearest whole number, if necessary. A psychology professor assigns letter grades on a test according to the following scheme. A: Top 5% of scores B: Scores below the top 5% and above the bottom 60% C: Scores below the top 40% and above the bottom 22% D: Scores below the top 78% and above the bottom 7% F: Bottom 7% of scores Scores on the test are normally distributed with a mean of 72.8 and a standard deviation of 9.4 . Find the numerical limits for a C grade. Round your answers to the nearest whole number, if necessary. A psychology professor assigns letter grades on a test according to the following scheme. A: Top 5% of scores B: Scores below the top 5% and above the bottom 60% C: Scores below the top 40% and above the bottom 22% D: Scores below the top 78% and above the bottom 7% F: Bottom 7% of scores Scores on the test are normally distributed with a mean of 72.8 and a standard deviation of 9.4 . Find the numerical limits for a C grade. Round your answers to the nearest whole number, if necessary. A psychology professor assigns letter grades on a test according to the following scheme. A: Top of scores B: Scores below the top and above the bottom C: Scores below the top and above the bottom D: Scores below the top and above the bottom F: Bottom of scores Scores on the test are normally distributed with a mean of and a standard deviation of . Find the numerical limits for a C grade. Round your answers to the nearest whole number, if necessary.

Explanation / Answer

mean = 72.8

Standard deviation = 9.4

C)

Below top 40%

P(X < x) = 0.6

Or, P(Z < (x - 72.8/9.4) = 0.6

Or, (x - 72.8)/9.4 = 0.26

Or, x = 0.26 * 9.4 + 72.8

Or, x = 75.244

Above the bottom 22%

P(X < x) = 0.22

Or, P(Z < (x - 72.8)/9.4) = 0.22

Or,(x - 72.8)/9.4 = -0.77

Or, x = 65.562

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.