An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140 minutes. What is the probability that average preparation time is between 80 and 90 minutes?
A) 0.7143
B) 0.7625
C) 0.2375
D) 0.2625

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The Answer of An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140 minutes. What is the probability that average preparation time is between 80 and 90 minutes?
A) 0.7143
B) 0.7625
C) 0.2375
D) 0.2625

An Accounting Firm Is Planning for the Next Tax Preparation