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An e-business manager wants to estimate the mean exposure to a certain type of internet ads. Originally she constructed a 90% confidence interval and then

An e-business manager wants to estimate the mean exposure to a certain type of internet ads. Originally she constructed a 90% confidence interval and then increased the confidence level to 95%. Choose the correct statement. 0 The confidence interval didn't change. 0 There is no relation between the length of the confidence interval and the confidence level. 0 The confidence interval became shorter. O The confidence interval became longer. 0 None of the above

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