PSYC 354 - Probability Template for Exam
Preparation and Exercises
PROBABILITY TEMPLATE
Questions 1-5
Fill in the highlighted blanks to answer/complete the statements. Use the textbook as your
resource for these definitions. (3 pts each)
1) The particular score associated with a percentile rank is known as a percentil.
The area in a distribution can be divided into four equal parts called quartiles.
2)
In independent random sampling, sampling with out replacement is the process of
3) returning each individual to the population before making the next selection.
Probabilities are expressed within a limited range. The lower limit of the range is 0,
4) which indicates an event that never occurs; and the higher limit of the range is 1, which
indicates an event that always occurs.
The standard normal table lists proportions of the normal distribution for a full range
5) of possible z-score values.
Questions 6-9
Complete the following exercises: (2 pts each)
6) What is the probability of
hitting a target if, in the long
run, 4 out of every 24 attempts Answer (show work): 4/24 = 1/6 or 0.167
actually hit the target? (3 pts)
7) On a TV game show, 25
people have won the grand
prize and a total of 350 people
have competed. Estimate the Answer (show work): 25/350 = 0.071
probability of winning the
grand prize. (3 pts)
8) Convert the following
decimals to percentages: (2 pts
each)
c
a) 0.65 a) 65% b) 83.2% 7%
)
b) .832
c) .07
_
Preparation and Exercises
PROBABILITY TEMPLATE
Questions 1-5
Fill in the highlighted blanks to answer/complete the statements. Use the textbook as your
resource for these definitions. (3 pts each)
1) The particular score associated with a percentile rank is known as a percentil.
The area in a distribution can be divided into four equal parts called quartiles.
2)
In independent random sampling, sampling with out replacement is the process of
3) returning each individual to the population before making the next selection.
Probabilities are expressed within a limited range. The lower limit of the range is 0,
4) which indicates an event that never occurs; and the higher limit of the range is 1, which
indicates an event that always occurs.
The standard normal table lists proportions of the normal distribution for a full range
5) of possible z-score values.
Questions 6-9
Complete the following exercises: (2 pts each)
6) What is the probability of
hitting a target if, in the long
run, 4 out of every 24 attempts Answer (show work): 4/24 = 1/6 or 0.167
actually hit the target? (3 pts)
7) On a TV game show, 25
people have won the grand
prize and a total of 350 people
have competed. Estimate the Answer (show work): 25/350 = 0.071
probability of winning the
grand prize. (3 pts)
8) Convert the following
decimals to percentages: (2 pts
each)
c
a) 0.65 a) 65% b) 83.2% 7%
)
b) .832
c) .07
_
