Question
In: Statistics and Probability
a) To check the normality of a sample, we approached two methods: QQ diagrams and the...
a) To check the normality of a sample, we approached two methods: QQ diagrams and the Shapiro-Wilk test. Please explain the QQ diagrams and the Shapiro-Wilk test and explain why we need such a test?
b) Mr. David, an independent statistician, wishes to test: H0: miu<=20 versus H1: miu>20. If he found the z-score 1.99, can you calculate the value of p using the reduced centered normal distribution table.
c) Explain the concept of sample and explain the difference between a population and a sample.
d) If your data is abnormal, you can use the Mann-Whitney or Wilcoxon tests instead of the t tests. Could you explain the Mann-Whitney and Wilcoxon tests?
Solutions
orchestra answered 1 year agoRelated Solutions
Use SPSS® to check your mock data for the following: • Assumptions of normality (Shapiro-Wilk) •...
Use SPSS® to check your mock data for the following: •
Assumptions of normality (Shapiro-Wilk) • Homogeneity of variance
(Lavene) • Outliers • Skewness/Kurtosis Complete each of the
associated tasks below: 1) Create a series of tables that depict
your results. Do not simply paste your output from SPSS®;
0.00
21.00
0.00
21.00
0.00
42.00
0.00
18.00
0.00
15.00
0.00
24.00
0.00
36.00
0.00
36.00
0.00
18.00
0.00
24.00
0.00
30.00
0.00
39.00
0.00
21.00
0.00
15.00
0.00
51.00
0.00...
Use SPSS® to check your mock data for the following: Assumptions of normality (Shapiro-Wilk) Homogeneity of...
Use SPSS® to check your mock data
for the following:
Assumptions of normality (Shapiro-Wilk)
Homogeneity of variance (Lavene)
Outliers
Skewness/Kurtosis
sex
film
arousal
1
1
47
1
1
38
1
1
41
1
1
35
1
1
43
1
1
49
1
1
38
1
1
39
1
1
44
1
1
48
1
2
25
1
2
8
1
2
4
1
2
16
1
2
15
1
2
6
1
2
20
1
2
12
1
2
9...
Use SPSS® to check your mock data for the following: Assumptions of normality (Shapiro-Wilk) Homogeneity of...
Use SPSS® to check your mock data
for the following:
Assumptions of normality (Shapiro-Wilk)
Homogeneity of variance (Lavene)
Outliers
Skewness/Kurtosis
Create a series of tables that depict your results. Do not
simply paste your output from SPSS®;
Time_Pressure
Detachment
Frequency
1
1
84
1
2
94
2
1
89
2
2
94
3
1
147
3
2
175
4
1
206
4
2
267
5
1
199
5
2
354
How do you know when to check normality or indepencence when constructing confidence intervals for proportions...
How
do you know when to check normality or indepencence when
constructing confidence intervals for proportions and means?
Suppose we are testing a data set for normality. The data has a median of 80.25,...
Suppose we are testing a data set for normality. The data has a
median of 80.25, a mean of 77.5, and a standard deviation of 2.1.
Compute Pearson's Coefficient of Skewness for this data.
PC =
Suppose that the histogram looks roughly bell-shaped and there are
no outliers. Can we say that this data is normally
distributed?
A. Yes
B. No
Round your Pearson's Coefficient to at least three decimal
places if applicable.
A laser printer is advertised to print...
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...
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.
We have learned about tree diagrams and venn diagrams. Explain what each of these are and...
We have learned about tree diagrams and venn diagrams. Explain
what each of these are and how they are helpful when calculating
probability. Then post a problem that your classmates can solve
using one of these two methods and respond to one of their
questions as well.
when we are solving a momentum transfer problem for a newtonian fluid we have two methods...
when we are solving a momentum transfer problem for a newtonian
fluid we have two methods to solve :
1/ shell balance
2 / Navier Stokes equation
Q / when we are using Navier stokes equation. do we need
continouity equations in order to solve the problem ? if yes please
provide step by step method to solve the momentum transfer
problem?
will we get a second stimulus check
will we get a second stimulus check
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