Standard X-Ray Machines Should Give Radiation Dosages Below 5

question 124

Multiple Choice

Standard x-ray machines should give radiation dosages below 5.00 mill roentgens (mil-r) . To test a certain x-ray machine, a sample of 36 observations is taken with a mean of 4.13 mil-r and a standard deviation of 1.91 mil-r.
-The null and alternative hypotheses to test whether this particular machine gives radiation below 5.00 mil-r (is in specification) is _____.

• A)H₀: ? = 5 vs.H_a: ? ? 5
• B)H₀: ? ? 5 vs.H_a: ? < 5
• C)H₀: ? ? 4.13 vs.H_a: ? < 4.13
• D)H₀: ? ? 5 vs.H_a: ? = 5
• E)H₀: ? ? 5 vs.H_a: ? > 5

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