Janet’s parents pay $25 per month for her phone. She has chosen a plan that charges $19.95 per month for unlimited calls and $0.
1 answer:
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Complete Question
The complete question is shown on the first uploaded image
Answer:
the null hypothesis is
the alternative hypothesis is
The test statistics is
The p-value is
so
Step-by-step explanation:
From the question we are told that
The population mean is
The sample size is n= 38
The sample mean is
The standard deviation is
Generally the null hypothesis is
the alternative hypothesis is
Generally the test statistics is mathematically evaluated as
substituting values
The p-value is mathematically represented as
From the z- table
So
