Question
In: Math
Each member of a random sample of 16 business economists was asked to predict the rate...
Each member of a random sample of 16 business economists was asked to predict the rate of inflation for the coming year. Assume that the predictions for the whole population of business economists follow a normal distribution with standard deviation 2.1%
a. The probability is 0.10 that the sample standard deviation is bigger than what number?
b. The probability is 0.01 that the sample standard deviation is less than what number?
c. Find any pair of numbers such that the probability that the sample standard deviation that lies between these numbers is 0.975.
Solutions
milcah answered 2 months agoRelated Solutions
Each member of a random sample of 19 business economists was asked to predict the rate...
Each member of a random sample of 19 business economists was
asked to predict the rate of inflation for the coming year. Assume
that the predictions for the whole population of business
economists follow a normal distribution with standard deviation
1.5%.
a. The probability is 0.001 that the sample standard deviation
is bigger than what number?
b. The probability is 0.05 that the sample standard deviation is
less than what number?
c. Find any pair of numbers such that the...
Each member of a random sample of 18 financial experts was asked to predict the rate...
Each member of a random sample of 18 financial experts was
asked to predict the rate of inflation for the coming year. Assume
that the predictions for the whole population of busfinancial
experts follow a normal distribution with standard deviation
2.2%.
a.) The probability is 0.10 that the sample standard deviation
is bigger than what number?
b.) The probability is 0.001 that the sample standard
deviation is less than what number?
c.) Find any pair of numbers such that the...
A random sample of 172 students was asked to rate on a scale to from 1...
A random sample of 172 students was asked to rate on a scale to
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For a type I error of 1% (alpha), can you be reasonably certain
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Robert Shiller asked a sample of the general public and a sample of economists the following...
Robert Shiller asked a sample of the general public and a sample
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( I WANT IT WRITTEN NOT...
A ski resort asked a random sample of guests to rate their satisfaction on various attributes...
A ski resort asked a
random sample of guests to rate their satisfaction on various
attributes of their visit on a scale of 1–5 with 1 = very
unsatisfied and 5 = very satisfied. The estimated regression model
was Y = overall satisfaction score, X1
= lift line wait, X2 = amount of ski trail
grooming, X3 = safety patrol visibility, and
X4 = friendliness of guest services.
Predictor
Coefficient
Intercept
2.9833
LiftWait
0.1458
AmountGroomed
0.2562
SkiPatrolVisibility
0.0428
FriendlinessHosts
−0.1298...
A random sample of 500 male and female adults was asked the amount of time each...
A random sample of 500 male and female adults was asked the
amount of time each person spent watching TV last week. Their
responses are shown at the right. At the 0.05 significance level,
does it appear that the amount of time spent watching TV is related
to the gender of the viewer?
Hours/Gender
Male
Female
Total
Under 8
90
110
200
8 to 15
85
75
160
15 or more
75
65
140
Total
250
250
500
Which test...
2. A random sample of 395 people were surveyed and each person was asked to report...
2. A random sample of 395 people were surveyed and each person
was asked to report the highest education level they obtained. The
data that resulted from the survey is summarized in the following
table:
High School Bachelors
Masters Ph.d. Total
Female 60 54 46
41 201
Male 40 44 53
57 194
Total 100 98 99
98 395
a. Are gender and education level dependent at 5% level of
significance? (6mks)
b.State and explain two methods of studying...
You take a random sample of 12 bags (16 oz. each) of jelly beans. In your...
You take a random sample of 12 bags (16 oz. each) of jelly
beans. In your study, the average number of jelly beans in a bag is
395 with a standard deviation of 35 beans. Because these bags are
filled by a machine, these are known to be taken from a normal
population.
Find and interpret a 96% confidence interval for the true mean
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A random sample of sixty (60) long distance truck drivers were each asked if they often...
A random sample of sixty (60) long distance truck drivers were
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(a) What is the sample proportion of long distance truck drivers
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the numeric answer in the box .
The government introduced new laws requiring long distance truck
drivers to take minimum rest breaks. Prior to introducing the new
laws, the...
A random sample of sixty (60) long distance truck drivers were each asked if they often...
A random sample of sixty (60) long distance truck drivers were
each asked if they often feel tired while driving. Forty five (45)
of the truck drivers replied “yes”.
(a) What is the sample proportion of long distance truck drivers
who often feel tired while driving (two decimal places)? Type only
the numeric answer in the box .
The government introduced new laws requiring long distance truck
drivers to take minimum rest breaks. Prior to introducing the new
laws, the...
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