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…

# Category: Statistics

## 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…

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