If all other quantities remain the​ same, how does the indicated change affect the width of a confidence​ interval?   ​(a) Increase in the level of confidence ​(b) Increase in the sample size ​(c) Increase in the population standard deviation       Question content area bottom Part 1 ​(a) How does an increase in the level of confidence affect the width of a confidence​ interval? Choose the correct answer below.   An increase in the level of confidence ▼

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