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Julli [10]
3 years ago
6

A survey was done to determine the effect of students changing answers while taking a​ multiple-choice test on which there is on

ly one correct answer for each question. Some students erase their initial choice and replace it with another. It turned out that 65​% of the changes were from incorrect answers to correct and that 29​% were from correct to incorrect. What percent of changes were from incorrect to​ incorrect?
Mathematics
1 answer:
Umnica [9.8K]3 years ago
7 0

Answer:

6% of the changes were from incorrect to​ incorrect

Step-by-step explanation:

The sum of the percentages must be 100%.

We have these following percentages

65​% of the changes were from incorrect answers to correct

29​% were from correct to incorrect

P% were from incorrect to incorrect

So

65 + 29 + P = 100

P = 100 - 94

P = 6

6% of the changes were from incorrect to​ incorrect

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2 years ago
A sample size of n = 64 is drawn from a population whose standard deviation is o = 5.6.
AlekseyPX

Answer:

The margin of error for a 99% confidence interval for the population mean is 1.8025.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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