## Problem 2001

Assume the SAT score are normally distributed with mean 1518 and standard deviation 325. Suppose you randomly select 100 SAT scores and want to find the probability that they have…

## Problem 1188

A binomial experiment is given. Decide whether you can the normal distribution to approximate the binomial distribution. If you can, find the mean and standard deviation. If you cannot, explain…

## Problem 1082

Find the equation of the parabola determine by the given information. Focus (6,0), directrix x = -6   Solution:-   First, notice that since the directrix is a vertical line,…

## Problem 1081

Find the vertex, the focus, and the directrix.  Then draw the graph. y2 = -6x   Solution:-   An equation of the form y2 = 4px is the standard equation…

## Problem 1047

Indicate whether the statement is a simple or a compound statement. If it is a compound statement, indicate whether it is a negation, conjunction, dis-junction, conditional, or bi-conditional by using…

## Problem 1042

The birth weights of full-term babies are normally distributed with mean 3800 grams and standard deviation σ = 470 grams. Use this information to do the following. (a)Draw a normal…

## Problem 1041

Suppose the monthly charge for cell phone plans is normally distributed with mean µ = 21. (a)    Draw a normal curve with the parameters labeled. (b)   Shade the  region that…

## Problem 1040

One graph in the figure represents a normal distribution with mean µ = 12 and standard deviation σ = 3. The other graph represents a normal distribution with mean µ…

## Problem 1039

The relative frequency histogram represents the length of phone calls on George’s cell phone during the month of September. Determine whether or not the histogram indicates that a normal distribution…

## Problem 1038

A study was conducted that resulted in the following relative frequency histogram. Determine whether or not the histogram indicates that a normal distribution could be used as a model for…