A cigarette manufacturer claims that his cigarettes have an average nicotine content of only 1.83

milligrams. To verify his claim, a sample of 8 cigarettes are tested and were found to have a nicotine content of 2.0, 1.7, 2.1, 1.9, 2.2, 2.1, 2.0 and

1.6 milligrams with standard deviation 0.21. At 5%

level of significance, would you accept the

manufacturer's claim?

Which system of linear inequalities is graphed? can somebody pleasssse

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?