Given the sample of observation {3, 6, 8, 7, 10} we want to
check the null...
Given the sample of observation {3, 6, 8, 7, 10} we want to
check the null hypothesis that the median is 6. Describe the steps
of a bootstrap-based procedure to perform this test.
Given the sample of observation {3, 6, 8, 7, 10} we want to
check the null hypothesis that the median is 6. Describe the steps
of a bootstrap-based procedure to perform this test.
Consider the paired sample {(3, 1),(3, 5),(6, 6),(6, 8),(7,
10)}. Do the following by hand (you may use a basic calculator, but
not a statistical program).
(a) Find estimates βˆ 0 and βˆ 1 of the regression parameters β0
and β1.
(b) Make a rough sketch of the data and regression line.
(c) Predict the value of y when x = 5.
(d) Predict the value of y when x = 15.
(e) Which prediction (part c or d) do...
3, 7, 8, 5, 6, 4, 9, 10, 7, 8, 6, 5 Using the previous question
's scores, If three points were added to every score in this
distribution, what would be the new mean? If three points were
added to every score in this distribution, what would be the new
standard deviation. Remember, you have already calculated
population standard deviation in a previous problem. This problem
requires two answers.
n = 8
measurements: 5, 3, 6, 7, 6, 5, 4, 7
Calculate the sample variance, s2, using the
definition formula. (Round your answer to four decimal places.)
s2 =
Calculate the sample variance, s2 using the
computing formula. (Round your answer to four decimal places.)
s2 =
Find the sample standard deviation, s. (Round your
answer to three decimal places.)
s =
The following is a sample of 20 measurements.
10 7 6 12 11 9 8 13 11 11 12 6 8 7 15 9 12 6 10 10
Compute the Sample mean (x), Sample variance (s2 ),
and the Sample standard deviation (s).
(round to two decimal places)
Count the number of measurements in the intervals
x ±s, x ±2s, x ±3s.
Express each count as a percentage of the total number of
measurements.
3
6
4
8
1
10
2
9
11
12
15
22
3
6
7
5
8
1
12
14
Each column represents a different treatment given to sick rats.
Each cell is a different rat. Use statistical analysis and use post
hoc testing using contrasts to find the best
treatment.
Treatment 1: vitamins
Treatment 2: prescription pills
Treatment 3: brain surgery
Treatment 4: shock therapy
Treatment 5: dietary changes
Lawyer
Nurse
Teacher
Control
8
6
9
8
5
7
6
7
7
6
8
6
7
8
8
7
4
9
7
9
A researcher is interested in whether the likeability of a
crying woman is affected by the viewer’s knowledge of the woman’s
occupation. Twenty participants were shown a video of a woman
crying and were asked to rate her likeability on a scale from 1
(not very likable) to 10 (highly likable). Prior to viewing the
video,...