Statistics final exam

Fifteen questions on all of Statistics. Answer all 15 to see your score. Questions are drawn from a bank of 45, so every attempt is different.

0 of 15 answered

Question 1 of 15

Which is a quantitative variable?

The median of 2, 5, 9, 12 is:

Which summary is best for a strongly right-skewed distribution?

A z-score of -1.5 means the value is:

Correlation r = 0 means:

P(A) = 0.6, P(B) = 0.3, independent. P(A and B) =

P(A or B) for mutually exclusive events with P(A) = 0.2, P(B) = 0.5 is:

How many committees of 4 can be chosen from 10 people?

A disease is rare and a test is 95% accurate. A positive result:

E(X) for X = 1, 2, 3 with probabilities 0.5, 0.3, 0.2 is:

For independent X and Y, Var(X - Y) equals:

A binomial with n = 30 and p = 0.4 has mean:

In a normal distribution, about 99.7% of values lie within:

Waiting times between Poisson events follow which distribution?

A t distribution compared with the standard normal has: