Question

1. Write the corresponding letter of the distribution used to
conduct the test to answer the question or to find the probability
requested in the blank to the left of the given information. You
will only use each letter once.

a. Student’s T

b. Standard Normal

c. Chi-Square

d. Binomial

e. Poisson

_________________Suppose that a doctor claims that 17 year olds
have an average body temperature that is warmer than the commonly
accepted average human temperature of µ = 98.6 degrees Fahrenheit.
The distribution of body temperatures is approximately normal with
a population standard deviation of 0.6 degrees Farenheit. A simple
random sample of 49 people, each of age 17, is selected to test if
the doctor’s claim is true. The mean temperature in the sample is
99.6 degrees Fahrenheit.

_________________It is assumed that the mean systolic blood
pressure is μ = 120 mm Hg in the general population and the
distribution of the measure is approximately normal. In the
Honolulu Heart Study, a sample of n = 15 people had an average of
130 mm Hg with a standard deviation of 4 mm Hg. Is the group in the
study significantly different from the general population?

_________________Finding the probability of more than 5 heads when
flipping a coin 12 times.

_________________Finding the probability of more than 5 trains
arriving at a station, given an average of 10 arrivals per
hour.

_________________ “Offshoring” is a term that describes a company’s
practice of relocating jobs and/or production to another country to
reduce labor costs. Research was published on the phenomenon of
offshoring and how prevalent it is worldwide. The article included
the results from a recent survey of CEOs at U.S. firms, where each
CEO was asked which of 4 categories described his or her firm’s
position on offshoring. Researchers want to determine if the
proportion of CEOs differ between the 4 categories.

_________________ Researchers want to study the effect of a new
drug on reducing cholesterol levels. A sample of 500 individuals
with high cholesterol were randomly assigned to one of two groups
(placebo, drug). The distribution of the change in cholesterol
levels within each group are approximately normally distributed.
The researchers want to test to see if the mean change in
cholesterol level differs between the placebo group and drug
group.

Answer #1

Write the corresponding letter of the distribution used to
conduct the test to answer the question or to find the probability
requested in the blank to the left of the given information. You
will only use each letter once.
Student’s T
Standard Normal
Chi-Square
Binomial
Poisson
________________ Researchers want to
study the effect of a new drug on reducing cholesterol levels. A
sample of 500 individuals with high cholesterol were randomly
assigned to one of two groups (placebo, drug). The...

Answer all parts of question 1, each part is worth a
corresponding point value.
1a On June 23, 2003, a huge, unidentified sea creature was found
washed ashore on a beach in Chile. The animal was described a
40-foot long mass of rotting gray flesh that scientists estimated
to weigh about 13 tons. Some scientists believed that the creature
was a giant octopus, despite the absence of obvious tentacles. The
largest octopi are found along the northern Pacific coast of...

1. In each case, identify the relevant sampling distribution (if
possible), and justify your answer.
(a) House prices have a positively-skewed distribution. Suppose
Perth house values have a mean price of $650,000 with a standard
deviation of $450,000. What is the distribution of the average
price of 45 randomly-selected Perth houses?
(b) Assume that birthdays are uniformly distributed over a
calendar year.If X is the day- number of birthdays (i.e., X varies
from 1 to 365, ignoring leap-years), then μX...

Instructions: Write probabilities to four decimal places
(percentages to two decimal places).
Draw bell curves to illustrate each desired areas. Use the
correct probability notation (e.g. P(X
>12.5) = P(z > 1.2) …. Use the Standard Normal
Distribution Table to answer Questions 1
& 8).
1. The total blood cholesterol levels in a certain Mediterranean
population are found to be
normally distributed with a mean of 160 milligrams/deciliter
(mg/dL) and a standard
deviation of 50 mg/dL. Researchers at the National...

Multiple Choice
Choose the best answer. Write the corresponding letter
on the blank.
1. Type X gypsum board is commonly called .
backing board
fire-code board
blue board
eased edge
2. is used for the core of solid gypsum partitions.
Predecorated
Veneer plastic
X-rock
Coreboard
3. has a special fire-resistant core encased in a
moisture-repellent paper.
Liner board
Blue board
Tapered gypsum
Regular gypsum panels
4. has a core of Portland cement reinforced with a glass fiber
mesh embedded in...

1. Several baseline studies are conducted on X = “cholesterol
level (mg/dL)” in a certain population of individuals. From the
given information described below for each of these studies, choose
the LETTER of the most appropriate statistical test to be
implemented, from the following list. Note: For each study, there
is only one correct choice of test. However, a given statistical
test can be the correct choice for more than one study. For
example, choice A could be the correct...

Encircle the letter that corresponds to your answer:
1. When one analyses data based on a sample, one
calculates a
Parameter b) variable c)
constant d) statistics 2. Mathematical methods used to draw
tentative conclusions about a population based on sample Data are
referred to as
Descriptive statistics b) sample
statistics c) inferential statistics d)
random sampling 3. The mean is ____ sensitive to extreme scores
than the median.
More b)
equally c) less 4. If a distribution
of raw...

Example 1: Among females in the US in a given age cohort, a
diastolic blood pressure is normally distributed with mean µ = 95
mm Hg and standard deviation σ = 15 mm Hg. a) What is the
probability that a randomly selected woman has a diastolic blood
pressure less than 90 mm Hg? b) What is the probability that she
has a diastolic blood pressure greater than 95 mm Hg? c) What is
the probability that she has a...

1. Find P(- 1.68 < Z < 1.68)
Group of answer choices
A. .9535
B. .9070
C. .0465
D. .4535
2. A study of homeowners in the 5th congressional district in
Maryland found that their annual
household incomes are normally distributed with a mean of $41,182
and a standard deviation of $11,990
(based on data from Nielsen Media Research).
What percentage of household incomes are greater than
$30,000?
Group of answer choices
A. 31.42%
B. 82.45%
C. 32.45%
D. 17.55%...

QUESTION 1 [13 MARKS]
Write down only the letter corresponding to your choice next to
the question number.
1.1. A random variable that can assume only a finite number of
values is referred to as a
a) Infinite sequence
b) Finite sequence
c) Discrete random variable
d) Discrete probability function
e) All of the above
1.2 Which one of the following statements is incorrect?
a) A data set provides information about people, objects or
other entities.
b) If the possible...

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