A doctor's office
collected sample data for 25 patients, and found that they had to
wait...
A doctor's office
collected sample data for 25 patients, and found that they had to
wait an average of 35 minutes with a sample standard deviation of
10 minutes, in order to see the doctor. (The wait times were also
found to be normally distributed.) We are interested in calculating
a 98% confidence interval for the average waiting time for the
population of all patients.
PART 1: What would be
the standard error of the mean waiting time (to 1...
A doctor's office
collected sample data for 25 patients, and found that they had to
wait...
A doctor's office
collected sample data for 25 patients, and found that they had to
wait an average of 35 minutes with a sample standard deviation of
10 minutes, in order to see the doctor. (The wait times were also
found to be normally distributed.) We are interested in calculating
a 98% confidence interval for the average waiting time for the
population of all patients.
PART 2: What
t value would be used to calculate the interval estimate
(to 3...
The lengths of stay of 20 patients hospitalized with a digestive
dis- order are as follows:...
The lengths of stay of 20 patients hospitalized with a digestive
dis- order are as follows: 10, 4, 5, 8, 5, 7, 9, 11, 4, 3, 6, 9, 8,
5, 13, 4, 6, 8, 9, 3 Similarly, the lengths of stay of 15 patients
hospitalized with coro- nary heart disease are as follows: 11, 13,
16, 12, 5, 8, 9, 5, 6, 7, 4, 8, 9, 7, 8
Use Excel to find the mean, the mode, the median, the standard...
The following data are the lengths of time (in minutes) between
eruptions for a sample of...
The following data are the lengths of time (in minutes) between
eruptions for a sample of eruptions of the Old Faithful geyser in
Yellowstone National Park. 83 76 86 82 87
a. Calculate the mean, variance, and standard deviation for the
data. Be sure to follow the rounding conventions and include the
correct units!
X = _____ s2 = _____ s = _____
b. Based on the mean and standard deviation, would 90 minutes be
considered significantly high? Justify your...
The number of vehicles passing through a bank drive-up line
during each 15 minutes was recorded....
The number of vehicles passing through a bank drive-up line
during each 15 minutes was recorded. The results are shown
below.
28
30 28 31 31
28
33 30 38 34
34
32 27 34 28
23
18 30 30 30
a. Compute the sample mean, median, and the mode for the data on
distances driven.
b. Determine the range, variance, and standard
deviation.
c. Find the first and the third quartiles.
State the interquartile range.
The mean of the times (in minutes) it takes a lab technician to
perform a certain...
The mean of the times (in minutes) it takes a lab technician to
perform a certain task is of interest. The lab technician was
observed on 5 different occasions and 14.5, 14.2, 14.4, 14.3 and
14,6 were recorded.
a) Assume that data are random sample from a normal distribution
with variance 0.02.
b)Can we conclude that true mean time to perform this task is
different than 14 minutes? Let α = 0.05. Calculate P-Value of the
test.