Unit 4 Methods Revision Quiz

For the graph of y = f (x) shown, the number of points of inflection is:

• 3

• 2

• 5

• 0

The curve shown is concave down on the interval

• (0, b)

Which one of the following gives the correct value for c?

• 
• 
• 
• 

Which one of the following expressions will give the area of triangle ABC?

• 
• 
• 
• 

A test consists of six true/false questions. The probability that a student who guesses will obtain six correct answers is

• 0.9844

• 0.0278

• 0.0156

• 0.17

For this probability distribution, the mean, E(X), is equal to

• 0.275

• 6.7

• 6.5

• 2.75

• 191

• 13.82

• 9

• 81

If three fair coins are tossed, what is the probability that there are at least two heads?

Let X be a binomial random variable with parameters n = 400 and p = 0.1.

Then E(X), the mean of X, is equal to

• 40

• 36

• 6

• 6.32