Question
In: Statistics and Probability
A researcher compares the effectiveness of two different instructional methods. A random sample of 78 students...
A researcher compares the effectiveness of two different instructional methods. A random sample of 78 students using Method 1 produces a testing average of 89.5 with a standard deviation of 16.8. A sample of 117 students using Method 2 produces a testing average of 55.9 with a standard deviation of 8.2. Construct a 99% confidence interval for the true difference in testing averages between the two methods. Round the endpoints of your interval to the nearest tenth if necessary. Show all work.
Solutions
Expert Solution
Therefore, based on the data provided, the 99% confidence interval for the difference between the population means 28.896<μ1−μ2<38.304
Dear student,
I am waiting for your feedback. I have given my 100% to solve your
queries. If you satisfied with my answer then please please like
this.
Thank You
orchestra answered 1 year agoRelated Solutions
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching anatomy. A sample of 215215
students using Method 1 produces a testing average of 55.555.5. A
sample of 242242 students using Method 2 produces a testing average
of 64.264.2. Assume that the population standard deviation for
Method 1 is 7.957.95, while the population standard deviation for
Method 2 is 18.2118.21. Determine the 90%90% confidence interval
for the true difference between testing averages for students using
Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching anatomy. A sample of 61 students
using Method 1 produces a testing average of 88.6A sample of 111111
students using Method 2 produces a testing average of 64.9 Assume
that the population standard deviation for Method 1 is 14.68, while
the population standard deviation for Method 2 is 5.52. Determine
the 90%90%confidence interval for the true difference between
testing averages for students using Method 1 and students using...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 214
students using Method 1 produces a testing average of 53.9. A
sample of 193 students using Method 2 produces a testing average of
88.9. Assume that the population standard deviation for Method 1 is
17.61, while the population standard deviation for Method 2 is
11.73. Determine the 99% confidence interval for the true
difference between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 54
students using Method 1 produces a testing average of 51.7. A
sample of 90 students using Method 2 produces a testing average of
56.8. Assume that the population standard deviation for Method 1 is
7.35, while the population standard deviation for Method 2 is
16.72. Determine the 80% confidence interval for the true
difference between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 226
students using Method 1 produces a testing average of 69.8. A
sample of 191 students using Method 2 produces a testing average of
81.5. Assume that the population standard deviation for Method 1 is
11, while the population standard deviation for Method 2 is 16.55.
Determine the 99% confidence interval for the true difference
between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching anatomy. A sample of 225
students using Method 1 produces a testing average of 68.2 A sample
of 242 students using Method 2 produces a testing average of 66.2.
Assume that the population standard deviation for Method 1 is 5.66
while the population standard deviation for Method 2 is 10.06.
Determine the 98% confidence interval for the true difference
between testing averages for students using Method 1 and...
A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching physiology. A sample of 157
students using Method 1 produces a testing average of 65.9. A
sample of 129 students using Method 2 produces a testing average of
80. Assume the standard deviation is known to be 12.47 for Method 1
and 12.84 for Method 2. Determine the 95% confidence interval for
the true difference between testing averages for students using
Method 1 and students using Method 2....
A researcher compares the effectiveness of two different instructional methods for teaching electronics. A sample of...
A researcher compares the effectiveness of two different
instructional methods for teaching electronics. A sample of 138
students using Method 1 produces a testing average of 61 . A sample
of 156 students using Method 2 produces a testing average of 64.6 .
Assume that the population standard deviation for Method 1 is 18.53
, while the population standard deviation for Method 2 is 13.43 .
Determine the 98% confidence interval for the true difference
between testing averages for students...
A random sample of 134 students has a test score average of 78 with a standard...
A random sample of 134 students has a test score average of 78
with a standard deviation of 10.4. Find the margin of error if the
confidence level is 0.99. (Round answer to two decimal places)
1. A researcher is studying the effect of two different instructional programs (cooperative learning versus large-group...
1. A researcher is studying the effect of two different
instructional programs (cooperative learning versus
large-group lecture) on male and female students relative to
attitudes toward mathematics. He is using a 2
by 2 factorial design.
Write the three statistical hypotheses in words and in the
context of the given research setting.
2. Let’s assume that in problem 1 above it was reported that
FA (2, 55) = 1.03, p > .05, FB (2, 55) = 3.05,
p > .05,...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- You are tasked with assessing the health department’s intervention program in preventing recurrence of acute alcohol...
- Compare the MOSFET, JFET , and BJT and identify the reasons these devices behave differently. What...
- How would you use SAS Enterprise Miner to create a neural network model of your example?
- Explain the use of neural networking modeling in predictive analytics.
- Current Market Mix of Netflix, as detail as possible, please.
- This is all one question, thank you so much in advance! You must evaluate a proposal...
- X Company is considering the purchase of a new processor that costs $200,000. Shipping and setup...
ADVERTISEMENT