<u>(a) Construct a 95% confidence interval for the difference between the average number of intrusion attempts per day before and after the change of firewall setting (assume equal variance)</u>
George sells baseball cards online. He estimates he can make $4.75 per card. If George has 83 cards, using front-end estimation,
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Here is the answer :
people who like both the songs is 35 and
people who like only folk songs is 100.
