Use 2 as a factor to write an expression that is equivalent to the expression 8x+6y .
1 answer:
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Answer:
z-statistic
Step-by-step explanation:
We have to identify the correct test statistic to use with the given conditions.
- If the sample size is larger than 30, then the sample is considered to be large.
- We are given a sample size of 51, which is a a large sample.
- Also, the population standard deviation is known.
- Thus, we use the z-statistic when testing a hypothesis about a single mean.
- Formula:
where is the sample mean,
is the population mean,
is the population standard deviation and n is the sample size.