Statistics problem
The scores on a biology exam were normally distributed with a mean of $71$ and a standard deviation of $9$. A failing grade on the exam was anything $2$ or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed?
Mona Vinci
39
Answer
Answers can only be viewed under the following conditions:
- The questioner was satisfied with and accepted the answer, or
- The answer was evaluated as being 100% correct by the judge.
Ering
93
The answer is accepted.
Join Matchmaticians Affiliate Marketing
Program to earn up to a 50% commission on every question that your affiliated users ask or answer.
- answered
- 1522 views
- $3.00
Related Questions
- Causality Question
- 2 conceptual college statistics questions - no equations
- A miner trapped in a mine
- Statistics- Probability, Hypotheses , Standard Error
- Prove that $\lim_{n\rightarrow \infty} \int_{[0,1]^n}\frac{|x|}{\sqrt{n}}=\frac{1}{\sqrt{3}}$
- stats- data analysis
- Quantitative reasoning
- How do you calculate per 1,000? And how do you compensate for additional variables?
I have already asked this question. Please do not respond.