Question
In: Statistics and Probability
The amount Lucie spends on gasoline each month is normally distributed with a mean of $74...
The amount Lucie spends on gasoline each month is normally distributed with a mean of $74 and a standard deviation of $8. What percentage of her gasoline spending are between $50 and $98?
Solutions
orchestra answered 1 year agoRelated Solutions
The amount of time a shopper spends in the supermarket is normally distributed with a mean...
The amount of time a shopper spends in the supermarket is
normally distributed with a mean of 45 minutes with a standard
deviation of 12 minutes. If 10 shoppers are selected, how many of
them will spend less than 35 minutes? Round your answer to 3
decimal places. Do not include units in your answer. 4 points
QUESTION 13 The amount of time a shopper spends in the
supermarket is normally distributed with a mean of 45 minutes with
a...
The scores on a math test are normally distributed with a mean of 74 and a...
The scores on a math test are normally distributed with a mean
of 74 and a standard deviation of 8. The test scores range from 0
to 100. Seven students had test scores between 82 and 98. Estimate
the number of students who took the test.
74. IQ is normally distributed with a mean of 100 and a standard deviation of 15....
74. IQ is normally distributed with a mean of 100 and a standard
deviation of 15. Suppose one individual is randomly chosen. Let X =
IQ of an individual. X ~ _____(_____,_____) Find the probability
that the person has an IQ greater than 120. Include a sketch of the
graph, and write a probability statement. MENSA is an organization
whose members have the top 2% of all IQs. Find the minimum IQ
needed to qualify for the MENSA organization. Sketch...
Algebra scores in a school district are normally distributed with a mean of 74 and standard...
Algebra scores in a school district are normally distributed
with a mean of 74 and standard deviation 6. A new
teaching-and-learning system, intended to increase average scores,
is introduced to a random sample of 30 students, and in the first
year the average was 76.
(a) What is the probability that an average as high as 76 would
have been obtained under the old system?
(b) What is the null hypothesis for testing the new system, and
what is the...
Assume that females have pulse rates that are normally distributed with a mean of 74 beats...
Assume that females have pulse rates that are normally distributed
with a mean of 74 beats per minute and a standard deviation of 12.5
beats per minute.
(a) If 1 adult female is randomly selected find the
probability that her pulse rate is less than 80 beats per
minute.
(b) if 16 adult females are randomly selected, find the
probability that they have pulse rates with a mean less than 80
beats per minute
(2a) if 1 adult female is...
A normally distributed population has a mean of 74 and a standard deviation of 14. Determine...
A normally distributed population has a mean of 74 and a
standard deviation of 14. Determine the probability that a random
sample of size 24 has an average between 71 and 80.
Round to four decimal places.
Assume that the amount of cornflakes in a box is normally distributed with a mean of...
Assume that the amount of cornflakes in a box is normally
distributed with a mean of 16 oz. and a standard deviation of 0.1
oz.
a) Determine the percent of boxes that will contain between
15.83 oz. and 16.32 oz. of cornflakes?
b) Determine the percent of boxes that will contain more than
16.16 oz. of cornflakes.
c) If the manufacturer produces 300,000 boxes, how many of them
will contain less than 15.83 oz. of cornflakes?
d) If the manufacturer...
The fill amount of bottles of a soft drink is normally distributed, with a mean of...
The fill amount of bottles of a soft drink is normally
distributed, with a mean of
2.0
liters
and a standard deviation of
0.05
liter. Suppose you select a random sample of
25
bottles.
a. What is the probability that the sample mean will be
between
1.99
and
2.0
liters?
b. What is the probability that the sample mean will be
below
1.98
liters?
c. What is the probability that the sample mean will be greater
than
2.01
liters?
d....
The fill amount of bottles of a soft drink is normally distributed, with a mean of...
The fill amount of bottles of a soft drink is normally
distributed, with a mean of
2.0 liters and a standard deviation of 0.05 liter. Suppose you
select a random sample of 25 bottles.
a. What is the probability that the sample mean will be between
1.99 and 2.0 liters?
b. What is the probability that the sample mean will be below
1.98 liters?
c. What is the probability that the sample mean will be greater
than 2.01 liters?
d....
Suppose that the amount of sugar in a can of Pepsi is normally distributed with mean...
Suppose that the amount of sugar in a can of Pepsi is normally
distributed with mean μ = 55 g
and standard deviation σ = 1.5 g. What is the probability
that
d. What is the amount of sugar such that we can know that 97.5%
of the cans will have less than that
amount of sugar?
e. Suppose that at the plant we randomly sample 25 cans. What is
the probability that their average
amount of sugar is more...
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