A circle has a radius of 5 meter. What is the length of the arc that is captured by a central angle that measures 120 degrees? R
ound your answer to the nearest tenth.
a) 3.33 meters
b) 31.42 meters
c) 10.47 meters
d) 2.09 meters
a) 3.33 meters
b) 31.42 meters
c) 10.47 meters
d) 2.09 meters
2 answers:
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Answer:
The 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 is (-8.04, 0.84).
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for the difference between population means is:
The information provided is as follows:
The critical value of <em>z</em> for 98% confidence level is,
Compute the 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 as follows:
Thus, the 98% confidence interval for the true difference between testing averages for students using Method 1 and students using Method 2 is (-8.04, 0.84).