In the mid-1800s, a doctor decided to make the doctors wash their hands with a s

Question

In the mid-1800s, a doctor decided to make the doctors wash their hands with a strong disinfectant between patients at a clinic with a death rate of 12.3%. The doctor wanted to test the hypothesis that the death rate would go down after the new hand-washing procedure was used. What null and alternative hypotheses should he have used? Explain, using both words and symbols. Explain the meaning of any symbols you use State the null and alternative hypotheses using words. A. Ho: The death rate has remained the same at 12.3% after starting hand-washing Ha: The death rate has increased to a value greater than 12.3% O B. Ho: The death rate has remained the same at 12.3% after starting hand-washing Ha: The death rate has changed from 12.3% The death rate has increased to a value greater than 12.3% after starting-hand washing Ha: The death rate has decreased to a value less than 12.3% 0 D. Ho: The death rate has remained the same at 12.3% after starting hand-washing Ha: The death rate has decreased to a value less than 12.3% State the null and alternative hypotheses using symbols. Choose the correct answer below A. O B. ?. D. Ho: p-0.123, Ha: p#0.123 (p is the proportion of deaths at the clinic) Ho: p > 0.123, Ha: p

Explanation / Answer

Solution:-

1) (D)

H0 : The death rate has remained the same at 12.3% after starting hand washing.

HA : The death rate has decreased to a value less than 12.3%.

2)

State the hypotheses. The first step is to state the null hypothesis and an alternative hypothesis.

Null hypothesis: P > 0.123
Alternative hypothesis: P < 0.123

Note that these hypotheses constitute a one-tailed test.

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