Econ 215 Stats exam 2 Questions and Answers 2024
In statistical experiments, each time the experiment is repeated ** Answ** a different
outcome might occur
Two events with nonzero probabilities ** Answ** can not be both mutually exclusive and
independent.
The sum of the probabilities of two complementary events is ** Answ** 1.0
Which of the following is a characteristic of an experiment where the binomial probability
distribution is applicable? ** Answ** Exactly two outcomes are possible on each trial
An experiment consists of determining the speed of automobiles on a highway by the use of
radar equipment. The random variable in this experiment is a _____ random variable. **
Answ** continuous
The random variable x is known to be uniformly distributed between 70 and 100. The expected
value (mean) and variance of x (respectively) are ** Answ** 85 and 75
Which of the following is a characteristic of the standard normal probability distribution? **
Answ** The standard deviation must be 1
Larger values of the standard deviation result in a normal curve that is ** Answ** wider and
flatter
The sample space refers to ** Answ** the set of all possible experimental outcomes
If a fair six sided die is tossed two times and "3" shows up both times, the probability of "3" on
the third trial is ** Answ** the same as any other outcome
In statistical experiments, each time the experiment is repeated ** Answ** a different
outcome might occur
Two events with nonzero probabilities ** Answ** can not be both mutually exclusive and
independent.
The sum of the probabilities of two complementary events is ** Answ** 1.0
Which of the following is a characteristic of an experiment where the binomial probability
distribution is applicable? ** Answ** Exactly two outcomes are possible on each trial
An experiment consists of determining the speed of automobiles on a highway by the use of
radar equipment. The random variable in this experiment is a _____ random variable. **
Answ** continuous
The random variable x is known to be uniformly distributed between 70 and 100. The expected
value (mean) and variance of x (respectively) are ** Answ** 85 and 75
Which of the following is a characteristic of the standard normal probability distribution? **
Answ** The standard deviation must be 1
Larger values of the standard deviation result in a normal curve that is ** Answ** wider and
flatter
The sample space refers to ** Answ** the set of all possible experimental outcomes
If a fair six sided die is tossed two times and "3" shows up both times, the probability of "3" on
the third trial is ** Answ** the same as any other outcome
