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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 using Method 1 and students using Method 2. Step 2 of 3 : Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places.
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milcah answered 1 year agoRelated Solutions
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A researcher compares the effectiveness of two different instructional methods for teaching anatomy. A sample of...
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A researcher compares the effectiveness of two different instructional methods for teaching physiology. A sample of...
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sample of 90 students using Method 2 produces a testing average of
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instructional methods for teaching physiology. A sample of 226
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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
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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
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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. A random sample of 78 students...
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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...
A researcher designed a study to find out the effectiveness of two teaching methods: lecture-style vs....
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two teaching methods: lecture-style vs. discussion-style. He
compares the test scores of the students taught with these two
different methods. The scores on the test range from 0 to 41 with
higher scores indicating better performance. The test results are
provided in the table below:
Group Methods
n
M
SS
1
lecture-style
15
24
336
...
In an effort to evaluate different methods of teaching a foreign language, a researcher examined the...
In an effort to evaluate different methods of teaching a foreign
language, a researcher examined
the performance of students learning Spanish under four different
teaching methods. Group 1 learns in a
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text; group 3 is taught from podcasts; and
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several weeks of instruction, all students were
given a Spanish quiz; these scores were recorded:
Group 1 Group...
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