Write the difference 20 - (-48) as a sum. Then simplify.
1 answer:
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Answer:
Decision rule
Reject null hypothesis
Conclusion
There is significance evidence that the true mean is different from 0.86
Step-by-step explanation:
From the question we are told that
The population mean
The sample is mean is
The standard deviation is
The level of significance is
The sample size n = 3
The null hypothesis is
The alternative hypothesis is
Generally the test statistics is mathematically represented as
=>
=>
Generally p- value is mathematically represented as
From the z-table
So
=>
From the obtained question we see that
Hence we reject the null hypothesis