Question
In: Statistics and Probability
Majesty Video Production Inc. wants the mean length of its advertisements to be 24 seconds. Assume...
Majesty Video Production Inc. wants the mean length of its advertisements to be 24 seconds. Assume the distribution of ad length follows the normal distribution with a population standard deviation of 2 seconds. Suppose we select a sample of 15 ads produced by Majesty. a. What can we say about the shape of the distribution of the sample mean time? b. What is the standard error of the mean time? c. What percent of the sample means will be greater than 25.50 seconds? d. What percent of the sample means will be greater than 22.50 seconds? e. What percent of the sample means will be greater than 22.50 but less than 25.50 seconds?
Solutions
orchestra answered 1 year agoRelated Solutions
Majesty Video Production Inc. wants the mean length of its advertisements to be 24 seconds. Assume...
Majesty Video Production Inc. wants the mean length of its
advertisements to be 24 seconds. Assume the distribution of ad
length follows the normal distribution with a population standard
deviation of 2 seconds. Suppose we select a sample of 15 ads
produced by Majesty. What can we say about the shape of the
distribution of the sample mean time? What is the standard error of
the mean time? (Round your answer to 2 decimal places.) What
percent of the sample...
Majesty Video Production Inc. wants the mean length of its advertisements to be 22 seconds. Assume...
Majesty Video Production Inc. wants the mean length of its
advertisements to be 22 seconds. Assume the distribution of ad
length follows the normal distribution with a population standard
deviation of 2 seconds. Suppose we select a sample of 10 ads
produced by Majesty.
What can we say about the shape of the distribution of the
sample mean time?
What is the standard error of the mean time? (Round your
answer to 2 decimal places.)
What percent of the sample...
Majesty Video Production Inc. wants the mean length of its advertisements to be 25 seconds. Assume...
Majesty Video Production Inc. wants the mean length of its
advertisements to be 25 seconds. Assume the distribution of ad
length follows the normal distribution with a population standard
deviation of 2 seconds. Suppose we select a sample of 16 ads
produced by Majesty.
A.What can we say about the shape of the distribution of the
sample mean time?
B What is the standard error of the mean time? (Round your
answer to 2 decimal places.)
C.What percent of the...
Majesty Video Production Inc. wants the mean length of its advertisements to be 23 seconds. Assume...
Majesty Video Production Inc. wants the mean length of its
advertisements to be 23 seconds. Assume the distribution of ad
length follows the normal distribution with a population standard
deviation of 2 seconds. Suppose we select a sample of 11 ads
produced by Majesty.
What can we say about the shape of the distribution of the
sample mean time?
What is the standard error of the mean time? (Round your answer
to 2 decimal places.)
What percent of the sample...
Majesty Video Production Inc. wants the mean length of its advertisements to be 26 seconds. Assume...
Majesty Video Production Inc. wants the mean length of its
advertisements to be 26 seconds. Assume the distribution of ad
length follows the normal distribution with a population standard
deviation of 2 seconds. Suppose we select a sample of 14 ads
produced by Majesty. What can we say about the shape of the
distribution of the sample mean time? What is the standard error of
the mean time? (Round your answer to 2 decimal places.) What
percent of the sample...
We must show our work process 2. Majesty Video Production Inc. wants the mean length of...
We must show our work process
2. Majesty Video Production Inc. wants the mean length of its
advertisements to be 30 seconds. Assume the distribution of ad
length follows the normal distribution with a population standard
deviation of 2 seconds. Suppose we select a sample of 25 ads
produced by Majesty.
a. What can we say about the shape of the distribution of the
sample mean time?
b. What is the standard error of the mean time?
c. What...
24. A hospital would like to determine the mean length of stay for its stroke patients....
24. A hospital would like to determine the mean length of stay
for its stroke patients. They observe a random sample of 6
patients, the resulting length of stay of stroke patients are: 6,
7, 5, 8, 11, 2 (in days) Suppose the true length of stay follows
normal distribution, a 95% confidence interval for population mean
is ____. (4 decimal places)
Use the information to answer Q25-27 A 98% confidence interval
for the mean number of credit hours that...
Let's assume that the average length of all commercials aired on Hulu is 78 seconds. From...
Let's assume that the average length of all commercials aired on
Hulu is 78 seconds. From a sample of 46 commercials aired during
sitcoms, it was found that the average length of those commercials
was 76 seconds with a standard deviation of 6.1 seconds. At the 5%
significance level, does this data provide sufficient evidence to
conclude that the mean length of sitcom commercials is different
from 78 seconds?
Step 1: Stating what we are testing Step 2: Stating
H0,...
In the 1990’s the mean song length was 240 seconds (4 minutes) long, and many believe...
In the 1990’s the mean song length was 240 seconds (4
minutes) long, and many believe songs are shorter in length now. A
simple random sample of current 40 popular songs is obtained with
sample mean 202 seconds and sample standard deviation 27 seconds.
Conduct an appropriate test (classical method or P-value method) to
conclude if the mean song length is less than 240 seconds at an 1%
significance level. Do not use the T-test feature of your
calculator.
Steel rods are manufactured with a mean length of 24 centimeter (cm). Because of variability in...
Steel rods are manufactured with a mean length of 24 centimeter
(cm). Because of variability in the manufacturing process, the
lengths of the rods are approximately normally distributed with a
standard deviation of 0.07 cm. Complete parts (a) to (d). (a)
What proportion of rods has a length less than 23.9 cm? 0.0764
(Round to four decimal places as needed.) (b) Any rods that are
shorter than 23.84 cm or longer than 24.16 cm are discarded. What
proportion of rods...
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