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Hier vind je de beste samenvattingen om te slagen voor STATISTICS Math 221. Er zijn o.a. samenvattingen, aantekeningen en oefenvragen beschikbaar.
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Math 221 Week 1 Quiz Answers help questions and answers well elaborated
Tentamen (uitwerkingen) • 12
pagina's
• 2023
Question 1

2 / 2 pts

A recent survey of the alumni of a university indicated that the average salary of 10,000

of its 200,000 graduates was $130,000. The $130,000 would be considered a:

Population

Parameter

Sample

Statistic

IncorrectQuestion 2

0 / 2 pts

A recent survey of the alumni of a university indicated that the average salary of 10,000

of its 200,000 graduates was $130,000. The 10,000 would be considered a:

Population

Parameter

Sample

Statistic

Question 3

2 / 2 pts

Based ...
Math 221 Week 1 Quiz Answers help questions and answers well elaborated
Laatste update van het document:
geleden
Question 1

2 / 2 pts

A recent survey of the alumni of a university indicated that the average salary of 10,000

of its 200,000 graduates was $130,000. The $130,000 would be considered a:

Population

Parameter

Sample

Statistic

IncorrectQuestion 2

0 / 2 pts

A recent survey of the alumni of a university indicated that the average salary of 10,000

of its 200,000 graduates was $130,000. The 10,000 would be considered a:

Population

Parameter

Sample

Statistic

Question 3

2 / 2 pts

Based ...
Question 1

2 / 2 pts

A student believes that there is a 90% probability of getting an A on the next test. This

would be considered:

Manufactured probability

Classical probability

Subjective probability

Empirical probability

Question 2

2 / 2 pts

Given the following information, find the probability that a randomly selected student will

be very short. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21

21.0%

39.4%

21.6%

28.8%

IncorrectQuestion 3

0 / 2 pts...
Math 221 Week 2 Homework
Laatste update van het document:
geleden
Question 1

2 / 2 pts

A student believes that there is a 90% probability of getting an A on the next test. This

would be considered:

Manufactured probability

Classical probability

Subjective probability

Empirical probability

Question 2

2 / 2 pts

Given the following information, find the probability that a randomly selected student will

be very short. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21

21.0%

39.4%

21.6%

28.8%

IncorrectQuestion 3

0 / 2 pts...
Math 221 Week 2 Homework Quiz (answered correctly)Spring 2023.
Tentamen (uitwerkingen) • 11
pagina's
• 2023
uestion 1

2 / 2 pts

The probability of drawing one card and getting queen is 4/52. This would be considered:

Subjective probability

Empirical probability

Manufactured probability

Classical probability

IncorrectQuestion 2

0 / 2 pts

Given the following information, find the probability that a randomly selected student will be

very tall. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21

21.0%

10.1%

21.6%

49.5%

Question 3

2 / 2 pts

Given the following inf...
Math 221 Week 2 Homework Quiz (answered correctly)Spring 2023.
Laatste update van het document:
geleden
uestion 1

2 / 2 pts

The probability of drawing one card and getting queen is 4/52. This would be considered:

Subjective probability

Empirical probability

Manufactured probability

Classical probability

IncorrectQuestion 2

0 / 2 pts

Given the following information, find the probability that a randomly selected student will be

very tall. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21

21.0%

10.1%

21.6%

49.5%

Question 3

2 / 2 pts

Given the following inf...
MATH221_W4_Lab_Excel_Adrian Arneson>MATH221 Statistics for Decision Making Week 4 Lab study guide Updated Spring 2023.
Tentamen (uitwerkingen) • 6
pagina's
• 2023
MATH221 Statistics for Decision Making

Week 4 Lab

Name: _______ Adrian Arneson ________________

Statistical Concepts:

 Probability

 Binomial Probability Distribution

Calculating Binomial Probabilities

NOTE: For question 1, you will be using the same data file your instructor gave you

for the Week 2 Lab.

1. Using the data file from your instructor (same one you used for the Week 2 Lab),

calculate descriptive statistics for the variable (Coin) where each of the thirty-five

student...
MATH221_W4_Lab_Excel_Adrian Arneson>MATH221 Statistics for Decision Making Week 4 Lab study guide Updated Spring 2023.
Laatste update van het document:
geleden
MATH221 Statistics for Decision Making

Week 4 Lab

Name: _______ Adrian Arneson ________________

Statistical Concepts:

 Probability

 Binomial Probability Distribution

Calculating Binomial Probabilities

NOTE: For question 1, you will be using the same data file your instructor gave you

for the Week 2 Lab.

1. Using the data file from your instructor (same one you used for the Week 2 Lab),

calculate descriptive statistics for the variable (Coin) where each of the thirty-five

student...
Exam (elaborations) MATH 221 Week 5 Homework well explained 2023 latest
Tentamen (uitwerkingen) • 6
pagina's
• 2023
Question 1

2 / 2 pts

From a random sample of 58 businesses, it is found that the mean time

the owner spends on administrative issues each week is 20.53 with a

standard deviation of 3.54. What is the 95% confidence interval for

the amount of time spent on administrative issues?

 (19.24, 24.14)

 (16.99, 24.07)

 (13.45, 27.61)

X (19.62, 21.44)

Question 2

2 / 2 pts

If a confidence interval is given from 43.85 up to 61.95 and the mean

is known to be 52.90, what is the maximum error?

 X9...
Exam (elaborations) MATH 221 Week 5 Homework well explained 2023 latest
Laatste update van het document:
geleden
Question 1

2 / 2 pts

From a random sample of 58 businesses, it is found that the mean time

the owner spends on administrative issues each week is 20.53 with a

standard deviation of 3.54. What is the 95% confidence interval for

the amount of time spent on administrative issues?

 (19.24, 24.14)

 (16.99, 24.07)

 (13.45, 27.61)

X (19.62, 21.44)

Question 2

2 / 2 pts

If a confidence interval is given from 43.85 up to 61.95 and the mean

is known to be 52.90, what is the maximum error?

 X9...
uestion 1

2 / 2 pts

A student believes that there is a 90% probability of getting an A on the next test. This would be

considered:

Empirical probability

Manufactured probability

Subjective probability

Classical probability

Question 2

2 / 2 pts

Given the following information, find the probability that a randomly selected student will be

tall, but not very tall. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21

50.5%

39.4%

10.1%

49.5%
DeVry University, Naperville MATH 221 Week 3 HW Quiz (answered correctly)
Laatste update van het document:
geleden
uestion 1

2 / 2 pts

A student believes that there is a 90% probability of getting an A on the next test. This would be

considered:

Empirical probability

Manufactured probability

Subjective probability

Classical probability

Question 2

2 / 2 pts

Given the following information, find the probability that a randomly selected student will be

tall, but not very tall. Number of students who are very short: 45, short: 60, tall: 82, very tall: 21

50.5%

39.4%

10.1%

49.5%
DeVry University, Naperville MATH 221 Week 3 Quiz (answered correctly
Tentamen (uitwerkingen) • 18
pagina's
• 2023
Question 1

0 / 2 pts

(CO 1) A survey of 385 people who like wild sweaters found that 74% had a wild holiday

sweater. What is the population and what is the sample?

Population: people who like wild sweaters: Sample: the 385 people who had a wild

holiday sweater

Population: people who like sweaters; Sample: the 74% that had a wild holiday sweater

Population: people who like wild sweaters; Sample: the 385 people who like wild

sweaters

Population: people who like wild sweaters; Sample: the ...
DeVry University, Naperville MATH 221 Week 3 Quiz (answered correctly
Laatste update van het document:
geleden
Question 1

0 / 2 pts

(CO 1) A survey of 385 people who like wild sweaters found that 74% had a wild holiday

sweater. What is the population and what is the sample?

Population: people who like wild sweaters: Sample: the 385 people who had a wild

holiday sweater

Population: people who like sweaters; Sample: the 74% that had a wild holiday sweater

Population: people who like wild sweaters; Sample: the 385 people who like wild

sweaters

Population: people who like wild sweaters; Sample: the ...
Question 1

2 / 2 pts

Let x represent the height of first graders in a class. This would be considered what type

of variable:

Discrete

Continuous

Nonsensical

Lagging

Question 2

2 / 2 pts

Let x represent the height of corn in Oklahoma. This would be considered what type of

variable:

Continuous

Discrete

Inferential

Distributed

IncorrectQuestion 3

0 / 2 pts

Consider the following table.

Age Group Frequency

18-29 9831

30-39 7845

40-49 6869

50-59 6323

60-69 5410

70 and over 52...
DeVry University, Naperville MATH 221 Week 3 HW Quiz (answered correctly)
Laatste update van het document:
geleden
Question 1

2 / 2 pts

Let x represent the height of first graders in a class. This would be considered what type

of variable:

Discrete

Continuous

Nonsensical

Lagging

Question 2

2 / 2 pts

Let x represent the height of corn in Oklahoma. This would be considered what type of

variable:

Continuous

Discrete

Inferential

Distributed

IncorrectQuestion 3

0 / 2 pts

Consider the following table.

Age Group Frequency

18-29 9831

30-39 7845

40-49 6869

50-59 6323

60-69 5410

70 and over 52...
Exam (elaborations) DeVry University, Naperville MATH 221 quiz 5(Latest 2023)
Tentamen (uitwerkingen) • 19
pagina's
• 2023
Question 1

2 / 2 pts

(CO 4) Consider the following table:

Age Group Frequency

18-29 983

30-39 784

40-49 686

50-59 632

60-69 541

70 and over 527

If you created the probability distribution for these data, what would be the probability of

30-39?

0.189

0.237

0.425

0.165

Question 2

2 / 2 pts

(CO 4) Consider the following table of hours worked by part-time employees. These

employees must work in 5 hour blocks.

Weekly hours worked Probability

5 0.06

15 0.61

20 0.18

25 0.15

Fin...
Exam (elaborations) DeVry University, Naperville MATH 221 quiz 5(Latest 2023)
Laatste update van het document:
geleden
Question 1

2 / 2 pts

(CO 4) Consider the following table:

Age Group Frequency

18-29 983

30-39 784

40-49 686

50-59 632

60-69 541

70 and over 527

If you created the probability distribution for these data, what would be the probability of

30-39?

0.189

0.237

0.425

0.165

Question 2

2 / 2 pts

(CO 4) Consider the following table of hours worked by part-time employees. These

employees must work in 5 hour blocks.

Weekly hours worked Probability

5 0.06

15 0.61

20 0.18

25 0.15

Fin...
DeVry University, Naperville MATH 221 Math 221 Week 7 Quiz
Tentamen (uitwerkingen) • 18
pagina's
• 2023
Question 1

2 / 2 pts

(CO6) From a random sample of 55 businesses, it is found that the mean time that

employees spend on personal issues each week is 5.8 hours with a standard deviation

of 0.35 hours. What is the 95% confidence interval for the amount of time spent on

personal issues?

(5.74, 5.90)

(5.73, 5.87)

(5.72, 5.88)

Correct!

(5.71, 5.89)

Question 2

0 / 2 pts

(CO6) If a confidence interval is given from 8.54 to 10.21 and the mean is known to be

9.375, what is the maximum erro...
DeVry University, Naperville MATH 221 Math 221 Week 7 Quiz
Laatste update van het document:
geleden
Question 1

2 / 2 pts

(CO6) From a random sample of 55 businesses, it is found that the mean time that

employees spend on personal issues each week is 5.8 hours with a standard deviation

of 0.35 hours. What is the 95% confidence interval for the amount of time spent on

personal issues?

(5.74, 5.90)

(5.73, 5.87)

(5.72, 5.88)

Correct!

(5.71, 5.89)

Question 2

0 / 2 pts

(CO6) If a confidence interval is given from 8.54 to 10.21 and the mean is known to be

9.375, what is the maximum erro...
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