Question

1. In a positively skewed distribution:

	a.	the median is less than the mean.
	b.	the median equals the mean.
	c.	the median is larger than the mean.
	d.	the mean can be larger or smaller than the median.

2. What is the mean of x, given the function below?

f(x) =(1/10) e^-x/10     x 0

	a.	100
	b.	1,000
	c.	10
	d.	0.10

3. The starting salaries of individuals with an MBA degree are normally distributed with a mean of $40,000 and a standard deviation of $5,000. What percentage of MBA's will have starting salaries of $34,000 to $46,000?

	a.	38.49%
	b.	76.98%
	c.	38.59%
	d.	50%

4. z is a standard normal random variable. The P( z > 2.11) equals

	a.	0.9821
	b.	0.4821
	c.	0.5
	d.	0.0174

Answer 1

In a positively skewed distribution is shown below.

Correct choice is c. the median is larger than the mean

The mean of the exponential distribution is  

Correct choice is c. 10.

We have The starting salaries of individuals with an MBA degree are normally distributed  

The probability,

Correct choice is b. 76.98%

The probability,

Correct choice is d. 0.0174​​​​​​​