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13.1 Practice final exam 2

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This module is a practice final for an associated elementary statistics textbook, Collaborative Statistics, available for Fall 2008.

A study was done to determine the proportion of teenagers that own a car. The population proportion of teenagers that own a car is the

  • statistic
  • parameter
  • population
  • variable

B: parameter

The next two questions refer to the following data:

value frequency
0 1
1 4
2 7
3 9
6 4

The box plot for the data is:

A

If 6 were added to each value of the data in the table, the 15th percentile of the new list of values is:

  • 6
  • 1
  • 7
  • 8

C: 7

The next two questions refer to the following situation:

Suppose that the probability of a drought in any independent year is 20%. Out of those years in which a drought occurs, the probability of water rationing is 10%. However, in any year, the probability of water rationing is 5%.

What is the probability of both a drought and water rationing occurring?

  • 0.05
  • 0.01
  • 0.02
  • 0.30

C: 0.02

Which of the following is true?

  • drought and water rationing are independent events
  • drought and water rationing are mutually exclusive events
  • none of the above

C: none of the above

The next two questions refer to the following situation:

Suppose that a survey yielded the following data:

Favorite pie type
gender apple pumpkin pecan
female 40 10 30
male 20 30 10

Suppose that one individual is randomly chosen. The probability that the person’s favorite pie is apple or the person is male is:

  • 40 60
  • 60 140
  • 120 140
  • 100 140

D: 100 140

Suppose H o is: Favorite pie type and gender are independent.

The p-value is:

  • ≈ 0
  • 1
  • 0.05
  • cannot be determined

A: ≈ 0

The next two questions refer to the following situation:

Let’s say that the probability that an adult watches the news at least once per week is 0.60. We randomly survey 14 people. Of interest is the number that watch the news at least once per week.

Which of the following statements is FALSE?

  • X ~ B 14 0.60
  • The values for x are: { 1 , 2 , 3 , ... , 14 }
  • μ = 8.4
  • P ( X = 5 ) = 0.0408

B: The values for x are: { 1 , 2 , 3 , ... , 14 }

Find the probability that at least 6 adults watch the news.

  • 6 14
  • 0.8499
  • 0.9417
  • 0.6429

C: 0.9417

The following histogram is most likely to be a result of sampling from which distribution?

  • Chi-Square with df = 6
  • Exponential
  • Uniform
  • Binomial

D: Binomial

The ages of campus day and evening students is known to be normally distributed. A sample of 6 campus day and evening students reported their ages (in years) as: { 18 , 35 , 27 , 45 , 20 , 20 }

What is the error bound for the 90% confidence interval of the true average age?

  • 11.2
  • 22.3
  • 17.5
  • 8.7

D: 8.7

If a normally distributed random variable has µ = 0 and σ = 1 , then 97.5% of the population values lie above:

  • -1.96
  • 1.96
  • 1
  • -1

A: -1.96

The next three questions refer to the following situation:

The amount of money a customer spends in one trip to the supermarket is known to have an exponential distribution. Suppose the average amount of money a customer spends in one trip to the supermarket is $72.

What is the probability that one customer spends less than $72 in one trip to the supermarket?

  • 0.6321
  • 0.5000
  • 0.3714
  • 1

A: 0.6321

How much money altogether would you expect next 5 customers to spend in one trip to the supermarket (in dollars)?

  • 72
  • 72 2 5
  • 5184
  • 360

D: 360

Questions & Answers

Discuss the differences between taste and flavor, including how other sensory inputs contribute to our  perception of flavor.
John Reply
taste refers to your understanding of the flavor . while flavor one The other hand is refers to sort of just a blend things.
Faith
While taste primarily relies on our taste buds, flavor involves a complex interplay between taste and aroma
Kamara
which drugs can we use for ulcers
Ummi Reply
omeprazole
Kamara
what
Renee
what is this
Renee
is a drug
Kamara
of anti-ulcer
Kamara
Omeprazole Cimetidine / Tagament For the complicated once ulcer - kit
Patrick
what is the function of lymphatic system
Nency Reply
Not really sure
Eli
to drain extracellular fluid all over the body.
asegid
The lymphatic system plays several crucial roles in the human body, functioning as a key component of the immune system and contributing to the maintenance of fluid balance. Its main functions include: 1. Immune Response: The lymphatic system produces and transports lymphocytes, which are a type of
asegid
to transport fluids fats proteins and lymphocytes to the blood stream as lymph
Adama
what is anatomy
Oyindarmola Reply
Anatomy is the identification and description of the structures of living things
Kamara
what's the difference between anatomy and physiology
Oyerinde Reply
Anatomy is the study of the structure of the body, while physiology is the study of the function of the body. Anatomy looks at the body's organs and systems, while physiology looks at how those organs and systems work together to keep the body functioning.
AI-Robot
what is enzymes all about?
Mohammed Reply
Enzymes are proteins that help speed up chemical reactions in our bodies. Enzymes are essential for digestion, liver function and much more. Too much or too little of a certain enzyme can cause health problems
Kamara
yes
Prince
how does the stomach protect itself from the damaging effects of HCl
Wulku Reply
little girl okay how does the stomach protect itself from the damaging effect of HCL
Wulku
it is because of the enzyme that the stomach produce that help the stomach from the damaging effect of HCL
Kamara
function of digestive system
Ali Reply
function of digestive
Ali
the diagram of the lungs
Adaeze Reply
what is the normal body temperature
Diya Reply
37 degrees selcius
Xolo
37°c
Stephanie
please why 37 degree selcius normal temperature
Mark
36.5
Simon
37°c
Iyogho
the normal temperature is 37°c or 98.6 °Fahrenheit is important for maintaining the homeostasis in the body the body regular this temperature through the process called thermoregulation which involves brain skin muscle and other organ working together to maintain stable internal temperature
Stephanie
37A c
Wulku
what is anaemia
Diya Reply
anaemia is the decrease in RBC count hemoglobin count and PVC count
Eniola
what is the pH of the vagina
Diya Reply
how does Lysin attack pathogens
Diya
acid
Mary
I information on anatomy position and digestive system and there enzyme
Elisha Reply
anatomy of the female external genitalia
Muhammad Reply
Organ Systems Of The Human Body (Continued) Organ Systems Of The Human Body (Continued)
Theophilus Reply
what's lochia albra
Kizito
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Source:  OpenStax, Collaborative statistics (with edits: teegarden). OpenStax CNX. Jul 20, 2009 Download for free at http://legacy.cnx.org/content/col10561/1.3
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