Question
In: Statistics and Probability
The following is the data obtained from a set of samples on the relation between statistics...
- The following is the data obtained from a set of samples on the relation between statistics
final exam scores and the students’ confidence rating on mathematical skills.
|
Student ID |
Exam score |
Math confidence |
Z exam |
Z math conf |
|
|
A |
60 |
1 |
A |
-.77 |
-1.61 |
|
B |
80 |
5 |
B |
.77 |
1.36 |
|
C |
70 |
3 |
C |
0 |
-0.12 |
|
D |
50 |
2 |
D |
-1.55 |
-0.87 |
|
E |
90 |
4 |
E |
1.55 |
0.62 |
|
F |
70 |
4 |
F |
0 |
0.62 |
|
Mean |
70 |
3.17 |
|||
|
SD |
12.9 |
1.34 |
|||
|
|
Solutions
Expert Solution
| SUMMARY OUTPUT | ||||||
| Regression Statistics | ||||||
| Multiple R | 0.7686 | |||||
| R Square | 0.5908 | |||||
| Adjusted R Square | 0.4885 | |||||
| Standard Error | 10.1147 | |||||
| Observations | 6 | |||||
| ANOVA | ||||||
| df | SS | MS | F | Significance F | ||
| Regression | 1 | 590.7692308 | 590.7692 | 5.774436 | 0.074114 | |
| Residual | 4 | 409.2307692 | 102.3077 | |||
| Total | 5 | 1000 | ||||
| Coefficients | Standard Error | t Stat | P-value | Lower 95% | Upper 95% | |
| Intercept | 46.6154 | 10.5713 | 4.409635 | 0.011604 | 17.26487 | 75.9659 |
| X | 7.3846 | 3.0731 | 2.403006 | 0.074114 | -1.14761 | 15.91684 |
Excel Command = Data > Data analysis > regression > select the data > ok
____________________________________________________
a) Correlation = (0.5908)0.5 = 0.7686
_____________________________________________________
Y = Exam score , X= confidence
______________________________________________________
c) Standard error = 10.1147
___________________________________________________________
d) It tell How wrong is the predicted value on an average by varying a unit in 'x'
orchestra answered 1 year agoRelated Solutions
The following is the data obtained from a set of samples on the relation between statistics...
The following is the data obtained from a set of samples on the
relation between statistics
final exam scores
and the number of missed classes.
Student ID
Exam score
Class missed
Z exam
Z class missed
A
90
0
A
1.46
-1.46
B
80
1
B
0.88
-0.88
C
70
3
C
0.29
0.29
D
60
2
D
-0.29
-0.29
E
50
4
E
-0.87
0.88
F
40
5
F
-1.46
1.46
Mean
65
2.5
SD
17.08
1.71
9.
a....
The following summary statistics were obtained from a data set on the effects of bike lanes...
The following summary statistics were obtained from a data set
on the effects of bike lanes on driver and bicyclist behaviour. In
the following x = available travel space for cars (in feet), which
is the distance between a cyclist and the roadway centre line, and
y = separation distance between a bike and a passing car
(determined by photography).
n = 10, xi = 154.2, yi = 80, x2i = 2452.18, yi2 = 675.16, xiyi =
1282.74
[a] Find...
Data obtained from the National Center for Health Statistics show that men between the ages of...
Data obtained from the National Center for Health Statistics
show that men between the ages of 20 and 29 have a mean height of
69.3 inches, with a standard deviation of 2.9 inches. A baseball
analyst wonders whether the standard deviation of heights of
major-league baseball players is less than 2.9 inches. The heights
(in inches) of 20 randomly selected players are given below.
72
74
71
72
76
70
77
75
72
72
77
72
75
70
73
73...
The following data was obtained from two independent samples for which sigma was unknown; they were...
The following data was obtained from two independent samples for
which sigma was unknown; they were selected from two normally
distributed populations.
Sample 1: 27, 39, 25, 33, 21, 35, 30, 26, 25, 31, 35, 30, 28
Sample 2: 24, 28, 23, 25, 24, 22, 29, 26, 29, 28, 19, 29
What is the point estimate for μ1- μ2?
Construct a 98% confidence interval for μ1- μ2.
Test at the 1% significance level whether the population mean
for the first...
DATA SET 2 The following data were obtained from a research study comparing two treatment conditions....
DATA SET 2
The following data were obtained from a research study comparing
two treatment conditions. Analyze this data to determine whether
you will reject or fail to reject the null hypothesis based upon
your results. Two-tailed test. Alpha = .05 (Please show work)
Treatment 1
Treatment 2
10
7
8
4
7
9
9
3
13
7
7
6
6
10
12
2
The following set of data was obtained by the method of initial rates for the reaction:...
The following set of data was obtained by the method of initial
rates for the reaction: 2NO(g) + O2 (g) ---->
2NO2(g)
Experiment #
[NO], M
[O2], M
Initial Rate, M/s
1
0.0126
0.0125
1.41 x 10^-2
2
0.0252
0.0250
1.13 x 10^-1
3
0.0252
0.0125
5.64 x 10^-2
a) What is the rate law for the reaction?
b) If you triple the concentration of both reactants, what will
happen to the rate?
c) What is the value of the...
For a data set obtained from a sample, n = 79 and x = 45.30 ....
For a data set obtained from a sample, n = 79 and x = 45.30 . It
is known that o = 4.1.
a. What is the point estimate of u?
The point estimate is ????????.
b. Make a 90% confidence interval for u .
Round your answers to two decimal places.
(???????, ??????)
c. What is the margin of error of estimate for part b?
Round your answer to three decimal places.
E =???????
A data set includes data from student evaluations of courses. The summary statistics are n =...
A data set includes data from student evaluations of courses.
The summary statistics are n = 84, x = 3.35, s = 0.58. Use a 0.05
significance level to test the claim that the population of student
course evaluations has a mean equal to 3.50. Assume that a sample
random sample has been selected. a. Identify the null hypotheses
and alternate hypotheses. addresses the original claim. Ho: H1: b.
Find the test statistics equation and value. c. Find the P...
For a data set obtained from a sample, n= 75 and x bar= 46.55. It is...
For a data set obtained from a sample, n= 75 and x bar= 46.55.
It is know that ?= 4.3.
a) What is the point estimate of ??
b) Make a 90% confidence interval for ?. Round answers to
two decimal places.
(_________,_________)
c) What is the margin of error of estimate for part b? Round
answers to three decimal places.
E=__________
Please show work for a,b,c.
1. There are three sets of assay data obtained from a set of standard solution in...
1. There are three sets of assay data obtained from a set of
standard solution in an ELISA experiment (triplicate assay). Use
Excel to draw a calibration curve. Then do the following:
(a) Calculate the Lower Limit of Detection (LLOD)
(b) Calculate the Limit of Quantitation (LOQ)
(c) Calculate the Sensitivity of the assay
(d) If an unknown sample gives an assay reading of 1.35. Use the
calibration curve to determine the concentration of this
sample.
Concentration (ng/mL)
Assay1
Assay2...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella Co.,...
- Parallel Arrays This question is in MindTap Cengage Summary In this lab, you use what you...
- 5. You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella...
- JAVA Write a test program that prompts the user to enter a series of integers and...
- (2) Cite an example on how organizations like Google, Facebook, Youtube etc collect data for image...
- The legal landscape is perpetually changing. Psychologists must remain abreast of these changes to avoid potentially...
- We are evaluating a project that costs $1.68 million, has a six-year life, and has no...
ADVERTISEMENT