Posted by **Patrick** on Tuesday, August 11, 2009 at 12:47pm.

A set of 750 values has a normal distribution with a mean of 12.5 and a standard deviation of 0.36.

A. What percent of the data is between 12.25 and 12.75?

ANSWER: 51.6%

B. Find the interval about the mean within wich 45% of the data lie.

ANSWER: 12.28-12.72

C. Find the probability of that a value selected at random from this data is between 11.67 and 13.33.

ANSWER: 97.9%

Are these correct?

## Answer This Question

## Related Questions

- Math-confused...plz help - I. Use Chebyshev’s theorem to find what percent of ...
- Math-Statistics - I. Use Chebyshev’s theorem to find what percent of the values ...
- Math - I. Use Chebyshev’s theorem to find what percent of the values will fall ...
- Stats - I. Use Chebyshev’s theorem to find what percent of the values will fall ...
- Pre calc - A set of 500 values has a normal distribution. The mean of the data ...
- Math (Statistic) - Considered the sampling distribution of a sample mean ...
- MATH - Which of the following normal distributions has the smallest spread? A. A...
- math - Using the data in the table, calculate the mean, range, variance, and ...
- math - Using the data in the table, calculate the mean, range, variance, and ...
- math - Using the data in the table, calculate the mean, range, variance, and ...

More Related Questions