A Researcher Performs a Hypothesis Test to Test the Claim $\mathrm { H } _ { 0 }$

question 66

Multiple Choice

A researcher performs a hypothesis test to test the claim that for a particular breed of dog,the mean weight of an adult dog is less than 18 kg.Use the given computer output to draw a conclusion about the mean adult dog weight for this breed at a significance level of 0.05. Test of $\mathrm { H } _ { 0 }$ : ? = 18 vs $\mathrm { H } _ { \mathrm { A } }$ : ? < 18
N Mean StDev t P-value
21 17.883 0.212 -2.53 0.01

• A)Fail to reject the null - there is strong evidence that the mean weight is less than 18 kg.
• B)Reject the null - there is strong evidence that the mean weight is 18 kg.
• C)Reject the null - there is strong evidence that the mean weight is less than 18 kg.
• D)Fail to reject the null - there is strong evidence that the mean weight is 18 kg.
• E)There is insufficient information to draw a conclusion.

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Definitions:

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A reflexive motion of the tongue pushing against or out of the mouth, commonly seen in infants and sometimes in older children or adults with certain conditions.