Question
In: Statistics and Probability
The table below represents data on a variable of interest collected from two independent groups, in...
The table below represents data on a variable of interest collected from two independent groups, in which each group was randomly assigned 10 participants. A researcher is interested in testing whether the two groups have different means.
Group 1 = 4, 4, 2, 6, 3, 5, 6, 1, 5, 4
Group 2 = 6, 10, 4, 7, 8, 5, 9, 10, 6, 7
Please bold answers and show work
a) What are the appropriate hypothesis for this analysis?
b) What is/are the critical value(s) for this tests at a 0.05 alpha level?
c) what is the estimated standard error for this test?
d) What is the observed value of the appropriate test statistic?
e) What is your decision regarding the stated hypothesis?
Solutions
orchestra answered 1 year agoRelated Solutions
The table below represents data on a variable of interest collected from a single sample. It...
The table below represents data on a variable of
interest collected from a single sample. It is known that the
variable of interest has a mean of 10 and a standard deviation of 5
in the general population. A researcher is interested in testing
whether the population from which this sample was selected is
different from the general population.
Data
9
7
12
5
6
4
8
11
3
7
What are the appropriate hypotheses for this analysis?
What is/are...
6) The table below represents data on a variable of interest collected from a single sample...
6) The table below represents data on a variable of interest
collected from a single sample measured at two different points in
time. A researcher is interested in testing whether scores are
higher at the second measurements.
Time 1 8 6 7 5 2 8 9 3 4 7
Time 2 7 9 11 6 4 5 8 7 4 5
a) What are the appropriate hypotheses for this analysis? b)
What is/are the critical value(s) for this test at a...
The table below represents data on a variable of interest collected from a single sample measured...
The table below represents data on a variable of interest
collected from a single sample measured at two different points in
time. A researcher is interested in testing whether scores are
higher at the second measurements.
Time 1: 8 6 7 5 2 8 9 3 4 7
Time 2: 7 9 11 6 4 5 8 7 4 5
a) What are the appropriate hypotheses for this analysis?
b) What is/are the critical value(s) for this test at a...
Consider the data in the table collected from four independent populations. The conclusion of a one-way...
Consider the data in the table collected from four
independent populations. The conclusion of a one-way ANOVA test
using
alphaαequals=0.05
is that the population means are not all the same. Determine which
means are different using
alphaαequals=0.05
Sample
1
Sample
2
Sample
3
Sample
4
6
13
23
9
7
16
13
8
8
19
19
10
9
22
Click here to view the ANOVA summary table.
LOADING...
Click here to view a table of critical values for the
studentized...
Given below are seven observations collected in a regression study on two variables, x (independent variable)...
Given below are seven observations collected in a regression
study on two variables, x (independent variable) and y (dependent
variable)
X
Y
2
12
3
9
6
8
7
7
8
6
7
5
9
2
a. develop the least squares estimated regression equation
b. At 95% confidence, perform a t test
and determine whether or not the slope is significantly different
from 0
c.Compute the coefficient of determination
d. Develop the 95% confidence interval for the mean value of...
Given below are seven observations collected in a regression study on two variables, X (independent variable)...
Given below are seven observations collected in a regression
study on two variables, X (independent variable) and Y (dependent
variable).
X
Y
2
12
3
9
6
8
7
7
8
6
7
5
9
2
a. Develop the least squares estimated regression equation.
b. State the hypotheses to test for the significance of the
regression line.
c. Perform an F test to determine whether or not the model is
significant. Let α = 0.05.
Given below are seven observations collected in a regression study on two variables, x (independent variable)...
Given below are seven observations collected in a regression
study on two variables, x (independent variable) and y (dependent
variable). x y 2 12 3 9 6 8 7 7 8 6 7 5 9 2 Given the followings b1
= -1.13 SSR = 50.625 SSE= 9.376 Sb1 = .2165 a. At 95% confidence,
perform a t test and determine whether or not the slope is
significantly different from zero. (No excel please show steps
thank you)
The following data for the dependent variable, y, and the independent variable, x, have been collected...
The following data for the dependent variable, y, and the
independent variable, x, have been collected using simple random
sampling:
X
Y
10
120
14
130
16
170
12
150
20
200
18
180
16
190
14
150
16
160
18
200
Construct a scatter plot for these data. Based on the scatter
plot, how would you describe the relationship between the two
variables?
Compute the correlation coefficient.
Given here are the data from a dependent variable and two independent variables. The second independent...
Given here are the data from a dependent variable and two
independent variables. The second independent variable is an
indicator variable with several categories. Hence, this variable is
represented by x2, x3, and
x4. How many categories are there for this
independent
variable? Use a computer to perform a multiple regression analysis
on this data to predict y from the x values.
Discuss the output and pay particular attention to the dummy
variables.
y
x1
x2
x3
x4
11
1.9...
Data collected from a sample of houses are organized and stored in the Table below. Develop...
Data collected from a sample of houses are organized and
stored in the Table below. Develop a regression model that predicts
the Assessed value of a house based on size of the house and
presence of a fireplace (Fireplace=1. No fireplace=0).
assessed value
size
fireplace
234.4
2
1
227.4
1.71
0
225.7
1.45
0
235.9
1.76
1
229.1
1.93
0
220.4
1.2
1
225.8
1.55
1
235.9
1.93
1
228.5
1.59
1
229.2
1.5
1
236.7
1.9
1
229.3
1.39...
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