Complete Question
The complete question is shown on the first , second and third uploaded image
Answer:
A
The correct option is A
B
The correct option is H
Step-by-step explanation:
The null hypothesis is
The alternative hypothesis is
The population mean difference is
Generally the sample size is n = 15
Generally the sample mean for input temperature is mathematically represented as
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Generally the sample mean for output temperature is mathematically represented as
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Generally the sample mean difference is mathematically represented as
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Generally the standard deviation is mathematically represented as
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Generally the test statistics is mathematically represented as
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Generally the degree of freedom is mathematically represented as
So
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Generally the p-value is mathematically represented as
Generally from the t -distribution table the probability of 1.342 at a degree of freedom of is
So
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Generally from the value obtained we see that Hence
The decision rule is
Fail to reject the null hypothesis
The conclusion is
The cooling system changes the temperature of the water by 6 degrees
