How do I state the 1. null hypothesis Ho (nothing happened, there is no difference) 2. alternative hypothesis Ha (something happened, there is a difference) in each of the folowing cases. (a)The diameter of a spindle in a small motor is supposed to be 5 mm. If the spindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of motors to determine whether the mean diameter has moved away from the target. (b)Census Bureau data show that the mean household income in the area served by a hospital is $42,500 per year. A market research firm questions patients at the hospital. The researchers suspect the mean household income of patients is higher than that of the general population.
How do I state the
1. null hypothesis Ho (nothing happened, there is no difference)
2. alternative hypothesis Ha (something happened, there is a difference)
in each of the folowing cases.
(a)The diameter of a spindle in a small motor is supposed to be 5 mm. If the spindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of motors to determine whether the mean diameter has moved away from the target.
(b)Census Bureau data show that the mean household income in the area served by a hospital is $42,500 per year. A market research firm questions patients at the hospital. The researchers suspect the mean household income of patients is higher than that of the general population.
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