BSTAT 2305 FINAL questions with verified answers
already passed
1. The following histogram represents the number
of pages in each book within a collection. What 11
is the frequency of books containing at least 250
but fewer than 400 pages? Add the frequencies, 7, 3
and 1, for the classes 250
up to 300, 300 up to 350
and 350 up to 400.
2. The accompanying relative frequency 1 - 10
distribution represents the last year car sales
for the sales force at Kelly's Mega Used Car
Center.
Car Sales - Relative Frequency
35 up to 45 - 0.07
45 up to 55 - 0.15
55 up to 65 - 0.31
65 up to 75 - 0.22
75 up to 85 - 0.25
If Kelly's employs 100 salespeople, how many of
these salespeople have sold at least 65 cars in the
last year?
3. The number of cars sold by a car salesperson
during each of the last 25 weeks is the following:
Number Sold - Frequency
0 - 10
,BSTAT 2305 FINAL questions with verified answers
already passed
47
(0.22 + 0.25)100 = 47 em-
ployees.
0.40
P(X = 1) = 10/25 = 0.40
,BSTAT 2305 FINAL questions with verified answers
already passed
2-5
What is the probability that the salesperson will
sell one car during a week?
4. Consider the following discrete probability 0.45
distribu- tion.
P(X < 5) = P(X = −10) +
x - P(X = x) P(X
-10 - 0.35 = 0) = 0.35 + 0.10 = 0.4
0 - 0.10
10 - 0.15
20 - 0.40
What is the probability that X is less than 5?
5. The director of graduate admissions is analyzing
the relationship between scores in the GRE and
student performance in graduate school, as The correlation
measured by a student's GPA. The table below between GRE and
shows a sample of 10 students.
GPA is positive and
strong.
6. There are 30 Major League Baseball teams in the
Na- tional League. Five of these teams will make =CORREL(<GRE
the play- offs at the end of the season. The data>,<GPA data>) =
number of unique groups of teams that can
0.894
make the playoffs is .
142,506
7. The number of homes sold by a realtor
during a month has the following probability
distribution: In Excel, the function
used is
Number Sold - Probability =COMBIN(30,5) =
142,506
0.75
, BSTAT 2305 FINAL questions with verified answers
already passed
The standard deviation of
already passed
1. The following histogram represents the number
of pages in each book within a collection. What 11
is the frequency of books containing at least 250
but fewer than 400 pages? Add the frequencies, 7, 3
and 1, for the classes 250
up to 300, 300 up to 350
and 350 up to 400.
2. The accompanying relative frequency 1 - 10
distribution represents the last year car sales
for the sales force at Kelly's Mega Used Car
Center.
Car Sales - Relative Frequency
35 up to 45 - 0.07
45 up to 55 - 0.15
55 up to 65 - 0.31
65 up to 75 - 0.22
75 up to 85 - 0.25
If Kelly's employs 100 salespeople, how many of
these salespeople have sold at least 65 cars in the
last year?
3. The number of cars sold by a car salesperson
during each of the last 25 weeks is the following:
Number Sold - Frequency
0 - 10
,BSTAT 2305 FINAL questions with verified answers
already passed
47
(0.22 + 0.25)100 = 47 em-
ployees.
0.40
P(X = 1) = 10/25 = 0.40
,BSTAT 2305 FINAL questions with verified answers
already passed
2-5
What is the probability that the salesperson will
sell one car during a week?
4. Consider the following discrete probability 0.45
distribu- tion.
P(X < 5) = P(X = −10) +
x - P(X = x) P(X
-10 - 0.35 = 0) = 0.35 + 0.10 = 0.4
0 - 0.10
10 - 0.15
20 - 0.40
What is the probability that X is less than 5?
5. The director of graduate admissions is analyzing
the relationship between scores in the GRE and
student performance in graduate school, as The correlation
measured by a student's GPA. The table below between GRE and
shows a sample of 10 students.
GPA is positive and
strong.
6. There are 30 Major League Baseball teams in the
Na- tional League. Five of these teams will make =CORREL(<GRE
the play- offs at the end of the season. The data>,<GPA data>) =
number of unique groups of teams that can
0.894
make the playoffs is .
142,506
7. The number of homes sold by a realtor
during a month has the following probability
distribution: In Excel, the function
used is
Number Sold - Probability =COMBIN(30,5) =
142,506
0.75
, BSTAT 2305 FINAL questions with verified answers
already passed
The standard deviation of
