Testing of hypothesis
The breaking strengths of cables
produced by a certain company are approximately normally distributed. The
company announced that the mean breaking strength is 2140 pounds. with a
standard deviation of 183 . A consumer protection agency claims that the actual
standard deviation is higher. Suppose that the consumer agency wants to carry
out a hypothesis test to see if its claim can be supported. State the null
hypothesis H 0 and the alternative hypothesis H1 they would use for this test.
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