3. Which of the following problem statements indicate the use of a double-sided hypothesis test? A. Suppose that a fabric is unsuitable for dyeing if its water pickup is less than 55%. Is the cotton fabric under consideration suitable for dyeing? B. A supplier claims that its products made from a graphite-epoxy composite material have a tensile strength of 40. An experimenter may test this claim by collecting a random sample of products and measuring their tensile strengths. C. A manufacturer claims that its cars achieve an average of at least 35 miles per gallon in highway driving. A consumer interest group tests this claim by driving a random selection of the cars in highway conditions and measuring their fuel efficiency. D. Suppose we are interested in the average online exposure time of students, a random variable that can be described by a probability distribution. We are interested in deciding whether or not the mean exposure time is now greater than lower than 8 hours per day average pre-COVID.

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