Question

Question 1 2 pts

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

Nonsensical |

Lagging |

Continuous |

Discrete |

Flag this Question

Question 2 2 pts

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

Discrete |

Inferential |

Distributed |

Continuous |

Flag this Question

Question 3 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 | 5279 |

If you created the probability distribution for these data, what
would be the probability of 18-29?

23.7% |

16.5% |

18.9% |

42.5% |

Flag this Question

Question 4 2 pts

Consider the following table.

Weekly hours worked | Probability |

1-30 (average=22) | 0.08 |

31-40 (average=35) | 0.41 |

41-50 (average=46) | 0.47 |

51 and over (average=61) | 0.04 |

Find the mean of this variable.

35.9 |

39.0 |

41.0 |

40.2 |

Flag this Question

Question 5 2 pts

Consider the following table.

Defects in batch | Probability |

0 | 0.28 |

1 | 0.35 |

2 | 0.16 |

3 | 0.09 |

4 | 0.10 |

5 | 0.02 |

Find the variance of this variable.

1.35 |

1.83 |

0.85 |

1.44 |

Flag this Question

Question 6 2 pts

Consider the following table.

Defects in batch | Probability |

2 | 0.15 |

3 | 0.44 |

4 | 0.18 |

5 | 0.10 |

6 | 0.07 |

7 | 0.06 |

Find the standard deviation of this variable.

1.36 |

0.93 |

1.86 |

3.68 |

Flag this Question

Question 7 2 pts

The standard deviation of samples from supplier A is 0.4582, while the standard deviation of samples from supplier B is 0.3358. Which supplier would you be likely to choose based on these data and why?

Supplier B, as their standard deviation is higher and, thus, easier to fit into our production line |

Supplier A, as their standard deviation is lower and, thus, easier to fit into our production line |

supplier B, as their standard deviation is lower and, thus, easier to fit into our production line |

Supplier A, as their standard deviation is higher and, thus easier to fit into our production line |

Flag this Question

Question 8 2 pts

Thirty-five percent of teens buy soda (pop) at least once each week. Eleven kids are randomly selected. The random variable represents the number of these kids who purchase soda (pop) at least once each week. For this to be a binomial experiment, what assumption needs to be made?

All teens have the same probability of being selected |

The probability of being a teen and being a kid should be the same |

All the kids eligible to be selected are teens |

All eleven kids selected live in the same region |

Flag this Question

Question 9 2 pts

A survey found that 39% of all gamers play video games on their smartphones. Ten frequent gamers are randomly selected. The random variable represents the number of frequent games who play video games on their smartphones. What is the value of p?

x, the counter |

0.10 |

10 |

0.39 |

Flag this Question

Question 10 2 pts

Thirty-five percent of US adults have little confidence in their cars. You randomly select ten US adults. Find the probability that the number of US adults who have little confidence in their cars is (1) exactly six and then find the probability that it is (2) more than 7.

(1) 0.069 (2) 0.974 |

(1) 0.021 (2) 0.026 |

(1) 0.069 (2) 0.005 |

(1) 0.021 (2) 0.005 |

Flag this Question

Question 11 2 pts

Say a business found that 29.5% of customers in Washington prefer grey suits. The company chooses 8 customers in Washington and asks them if they prefer grey suits. What assumption must be made for this study to follow the probabilities of a binomial experiment?

That the probability of being a selected customer is the same for all 8 people |

That those selected have similar characteristics to those in the original study |

That there is a 29.3% probability of being a selected customer |

That the probability of preferring grey suites is the same as preferring suits of other colors |

Flag this Question

Question 12 2 pts

Seven baseballs are randomly selected from the production line to see if their stitching is straight. Over time, the company has found that 89.4% of all their baseballs have straight stitching. If exactly five of the seven have straight stitching, should the company stop the production line?

Yes, the probability of exactly five having straight stitching is unusual |

No, the probability of exactly five have straight stitching is not unusual |

No, the probability of five or less having straight stitching is not unusual |

Yes, the probability of five or less having straight stitching is unusual |

Flag this Question

Question 13 2 pts

A beer company puts 15 ounces of beer in each can. The company has determined that 95.5% of cans have the correct amount. Which of the following describes a binomial experiment that would determine the probability that a case of 16 cans has all cans that are properly filled?

n=16, p=0.95, x=1 |

n=16, p=0.955, x=16 |

n=15, p=0.95, x=16 |

n=15, p=0.955, x=15 |

Flag this Question

Question 14 2 pts

A supplier must create metal rods that are 18.1 inches long to fit into the next step of production. Can a binomial experiment be used to determine the probability that the rods are correct length or an incorrect length?

No, as there are three possible outcomes, rather than two possible outcomes |

Yes, as each rod measured would have two outcomes: correct or incorrect |

No, as the probability of being about right could be different for each rod selected |

Yes, all production line quality questions are answered with binomial experiments |

Flag this Question

Question 15 2 pts

In a box of 12 pens, there is one that does not work. Employees
take pens as needed. The pens are returned once employees are done
with them. You are the 5^{th} employee to take a pen. Is
this a binomial experiment?

No, binomial does not include systematic selection such as “fifth” |

Yes, with replacement, the probability of getting the one that does not work is the same |

No, the probability of getting the broken pen changes as there is no replacement |

Yes, you are finding the probability of exactly 5 not being broken |

Flag this Question

Question 16 2 pts

Forty-two percent of employees make judgements about their co-workers based on the cleanliness of their desk. You randomly select 7 employees and ask them if they judge co-workers based on this criterion. The random variable is the number of employees who judge their co-workers by cleanliness. Which outcomes of this binomial distribution would be considered unusual?

1, 6, 7 |

0, 1, 2, 7 |

0, 1, 7 |

1, 2, 6, 7 |

Flag this Question

Question 17 2 pts

Sixty-eight percent of products come off the line within product specifications. Your quality control department selects 15 products randomly from the line each hour. Looking at the binomial distribution, if fewer than how many are within specifications would require that the production line be shut down (unusual) and repaired?

Fewer than 8 |

Fewer than 9 |

Fewer than 11 |

Fewer than 10 |

Flag this Question

Question 18 2 pts

The probability of a potential employee passing a drug test is 86%. If you selected 15 potential employees and gave them a drug test, how many would you expect to pass the test?

12 employees |

13 employees |

15 employees |

14 employees |

Flag this Question

Question 19 2 pts

The probability of a potential employee passing a training course is 86%. If you selected 15 potential employees and gave them the training course, what is the probability that more than 12 will pass the test?

0.648 |

0.352 |

0.900 |

0.852 |

Flag this Question

Question 20 2 pts

Off the production line, there is a 3.7% chance that a candle is defective. If the company selected 45 candles off the line, what is the probability that fewer than 3 would be defective?

0.975 |

0.916 |

0.037 |

0.768 |

Answer #1

1. Option C. Since height can take any value.

2. Option D. Continuous. Similar reason as answer 1

3. Option A. 23.7%. Probability=relative frequency = frequncy of class 18-29/total frequency

4. Option D. 40.2. mean= sum(probability*value)

5. Option C. 1.86. Find E(X), Then E(X^2). Then E(x^2)-E(X)^2

6. Option A. 1.36. SD(x)=Sqrt(Var(X). Same procedure as question 5

7. Option C.supplier B, as their standard deviation is lower and, thus, easier to fit into our production line

8. Option A.All teens have the same probability of being selected

9. Option D. 0.39. Since 39% of games play on their smartphone

Question
Fifty-three percent of employees make judgements about their
co-workers based on the cleanliness of their desk. You randomly
select 8 employees and ask them if they judge co-workers based on
this criterion. The random variable is the number of employees who
judge their co-workers by cleanliness. Which outcomes of this
binomial distribution would be considered unusual?
Homework Help:
3VD. Finding unusual outcomes from a probability distribution
(Links to an external site.) (2:32)
Group of answer choices
0, 1, 2,...

(Question 14) 2 pts In a survey of first graders, their mean
height was 51.6 inches with a standard deviation of 3.6 inches.
Assuming the heights are normally distributed, what height
represents the first quartile of these students? 54.03 inches 49.17
inches 48.00 inches 48.57 inches Flag this Question
(Question 15) 2 pts Hospital waiting room times are normally
distributed with a mean of 38.12 minutes and a standard deviation
of 8.63 minutes. What is the shortest wait time that...

Question 12 2 pts
Of the shirts produced by a company, 5% have loose threads, 9%
have crooked stitching, and 3.5% have loose threads and crooked
stitching. Find the probability that a randomly selected shirt has
loose threads or has crooked stitching.
Homework Help:
2VF (1): Probabilities using addition rule from values and
from percentages (Links to an external site.) (0:54)
2DG. Probabilities using addition rule (Links to an external
site.) (DOCX)
Group of answer choices
0.5%
14.0%
10.5%
17.5%...

question 6 (CO 3) Ten rugby balls are randomly selected from the
production line to see if their shape is correct. Over time, the
company has found that 85.2% of all their rugby balls have the
correct shape. If exactly 7 of the 10 have the right shape, should
the company stop the production line?
question 7 (CO 3) A bottle of water is supposed to have 20
ounces. The bottling company has determined that 98% of bottles
have the...

Question 1 2.5 pts 1. The perfectly competitive firm's demand
curve is horizontal at the market price. True False Flag this
Question Question 2 2.5 pts 2. In perfect competition, the market
price is established at the intersection of the market demand and
market supply curves in the industry and the individual firms are
"price takers" of that market price. True False Flag this Question
Question 3 2.5 pts 3. The perfectly competitive firm will continue
to produce in the...

Question 7 2 pts
A card is randomly selected from a standard deck of 52 cards.
What is P(8 or 9)?
Homework Help:
2VC: Probabilities when drawing one card from a deck (Links to
an external site.) (0:59)
2DD. Probabilities when drawing one card from a deck (Links to
an external site.) (DOCX)
Group of answer choices
13/52
16/52
8/52
2/8
Flag this question
Question 8 2 pts
In a sample of 500 customers, 140 say that service is poor....

Hi! Thanks for taking the time to check out my problem. If you
can please answer as many as possible and I really appreciate your
help.
Question 1 2 pts
The length of time a person takes to decide which shoes to
purchase is normally distributed with a mean of 8.21 minutes and a
standard deviation of 1.90. Find the probability that a randomly
selected individual will take less than 6 minutes to select a shoe
purchase. Is this outcome...

Question 71 pts
When country X imports goods from country Y,
only country X benefits.
only country Y benefits.
both country X and country Y benefit.
neither country X nor country Y benefit.
Flag this Question
Question 81 pts
Country X
wheat: 0 3 6 9 12
lumber: 4 3 2 1 0
Country Y
wheat: 0 1 2 3 4
lumber: 8 6 4 2 0
Before specialization and trade, when both countries are in the
middle total production...

Question 1 4 pts
Which of the following represents the safeguarding of
assets?
placing small, high-priced items in a locked display case
reducing payroll expenses to increase net income
purchasing rather than leasing company vehicles
allowing the company president to handle cash
Flag this Question
Question 2 4 pts
All of the following are objectives of a company’s internal
control system except:
Encourage employees to follow policies.
Promote operation efficiency.
Ensure debt is paid in a timely manner.
Ensure accurate...

Question 13 1 pts
Your company is considering purchasing a new system that costs
$200,500. This cost will be depreciated straight-line to zero over
the project's five-year life, at the end of which the system is
expected to be sold for $35,000 cash. The system will save the firm
$110,400 per year in pretax operating costs. What is the after-tax
cost saving per year associated with the new system? The tax rate
is 21%.
$40,100
$87,216
$110,400
$23,184
Question 14...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 7 minutes ago

asked 25 minutes ago

asked 33 minutes ago

asked 45 minutes ago

asked 48 minutes ago

asked 50 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago