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 be viewed only if
- The questioner was satisfied and accepted the answer, or
- The answer was disputed, but the judge evaluated it as 100% correct.
Ering
93
The answer is accepted.
Join Matchmaticians Affiliate Marketing
Program to earn up to 50% commission on every question your affiliated users ask or answer.
- answered
- 294 views
- $3.00
Related Questions
- Find conditions for all chips to become of the same color in this game
- Questions for Statistics Project
- Choosing the right statistical tests and how to organize the data accourdingly (student research project)
- Conditional mean and variance for joint PDF
- How would I perform an exploratory data analysis to visually assess the relationship between two sets of data?
- Compute the cumulative density function of X
- Use first set of data to derive a second set
- Probability maximum value of samples from different distributions
I have already asked this question. Please do not respond.