Question
In: Statistics and Probability
suppose average pizza delivery times are normally distributed with unknown population mean and population standard deviation...
suppose average pizza delivery times are normally distributed with unknown population mean and population standard deviation of 6. A random sample of 28 pizza delivery restaurants is taken and has a sample mean of delivery time of 36 minutes. Show your work.
A. find critical value of 99% confidence level
b. sketch graph
c. what distribution should you use for this problem
d. calculate error bound
e. lower endpoint
upper endpoint
Solutions
orchestra answered 1 year agoRelated Solutions
1) suppose average pizza delivery times are normally distributed with an unknown population mean and a...
1) suppose average pizza delivery times are normally distributed
with an unknown population
mean and a population standard deviation of 6 minutes. A random
sample of 28 pizza delivery
restaurants is taken and has a sample mean delivery time of 36
minutes. Find a 90% confidence
interval estimate for the population mean delivery time.
Average pizza delivery times to the West Loop are normally distributed with an unknown population mean...
Average pizza delivery times to the West Loop are normally
distributed with an unknown population mean and a population
standard deviation of six minutes. Students in 270 at UIC collect a
random sample of 28 pizza deliveries to the West is taken and they
find sample mean delivery time of 36 minutes. Find a 60 and
95 percent confidence interval for µ.
Suppose the average bus wait times are normally distributed with an unknown population mean and a...
Suppose the average bus wait times are normally distributed with
an unknown population mean and a population standard deviation of
of five minutes. A random sample of 30 bus wait times are taken and
has a sample mean of 25 minutes.
Find a 95% confidence interval estimate for the population mean
wait time.
The delivery times for a distributing site are normally distributed with an unknown population mean and...
The delivery times for a distributing site are normally
distributed with an unknown population mean and standard deviation.
If a random sample of 25 deliveries is taken to estimate the mean
delivery time, what t-score should be used to find a 98% confidence
interval estimate for the population mean? df t0.10 t0.05 t0.025
t0.01 t0.005 ... … … … … … 21 1.323 1.721 2.080 2.518 2.831 22
1.321 1.717 2.074 2.508 2.819 23 1.319 1.714 2.069 2.500 2.807 24...
The delivery times for a distributing site are normally distributed with an unknown population mean and...
The delivery times for a distributing site are normally
distributed with an unknown population mean and standard deviation.
If a random sample of 25 deliveries is taken to estimate the mean
delivery time, what t -score should be used to find a 98%
confidence interval estimate for the population mean?
df t 0.10 t 0.05 t 0.025 t 0.01 t 0.005 ... … … … … … 21 1.323
1.721 2.080 2.518 2.831 22 1.321 1.717 2.074 2.508 2.819 23...
Suppose µ is the mean of a normally distributed population for which the standard deviation is...
Suppose µ is the mean of a normally distributed population for
which the standard deviation is known to be 3.5. The hypotheses H0
: µ = 10 Ha : µ 6= 10 are to be tested using a random sample of
size 25 from the population. The power of an 0.05 level test when µ
= 12 is closest to
a. A population is normally distributed with a mean of 16.4 and a standard deviation of...
a. A population is normally distributed with a mean of 16.4 and
a standard deviation of 1.4. A sample of size 36 is taken from the
population.
What is the the standard deviation of the sampling
distribution?
Round to the nearest thousandth.
b. A population is normally distributed with a mean of 15.7 and
a standard deviation of 1.4. A sample of size 24 is taken from the
population.
What is the the standard deviation of the sampling
distribution?
Round...
1. A population is normally distributed with a mean of 18 and a standard deviation of...
1. A population is normally distributed with a mean of 18 and a
standard deviation of 2.5.
What is the probability of randomly selecting one item from the
population having:
a) A value greater than 18.
b) A value between 14 and 21.
Assume that a population is normally distributed with a mean of 100 and a standard deviation...
Assume that a population is normally distributed with a mean of
100 and a standard deviation of 15. Would it be unusual for the
mean of a sample of 3 to be 115 or more? Why or why not?
A population is normally distributed with mean ? and standard deviation ?. Find the percentage of...
A population is normally distributed with mean ? and standard
deviation ?. Find the percentage of values which are between ?−2?
and ?+2?.
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