Question
In: Statistics and Probability
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.
Step 1 of 2:
Find the critical value that should be used in constructing the confidence interval.
Solutions
Expert Solution
- By calculation using formula
- Using Minitab software
Steps-
Stat>Basic statistics>2 sample t>summarised data>enter values>ok
Output-
--------------------
Thank you...!
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orchestra answered 1 year agoRelated Solutions
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