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11. Dowsing. In a rural area, only about 30% of the
Chapter 20, Problem 11(choose chapter or problem)
11. Dowsing. In a rural area, only about 30% of the wellsthat are drilled find adequate water at a depth of 100 feetor less. A local man claims to be able to find water bydowsingusing a forked stick to indicate where thewell should be drilled. You check with 80 of his customersand find that 27 have wells less than 100 feetdeep. What do you conclude about his claim?a) Write appropriate hypotheses.b) Check the necessary assumptions.c) Perform the mechanics of the test. What is theP-value?d) Explain carefully what the P-value means in context.e) Whats your conclusion?
Questions & Answers
QUESTION:
11. Dowsing. In a rural area, only about 30% of the wellsthat are drilled find adequate water at a depth of 100 feetor less. A local man claims to be able to find water bydowsingusing a forked stick to indicate where thewell should be drilled. You check with 80 of his customersand find that 27 have wells less than 100 feetdeep. What do you conclude about his claim?a) Write appropriate hypotheses.b) Check the necessary assumptions.c) Perform the mechanics of the test. What is theP-value?d) Explain carefully what the P-value means in context.e) Whats your conclusion?
ANSWER:Step 1 of 5
Given data
The claimed proportion of wells with adequate water at 100ft:
Number of local man’s customers:
Number of customers supporting the claim:
