What is the answer to 1 plus 8
2 answers:
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Answer:
We conclude that μ <= 20 after hypothesis testing.
Step-by-step explanation:
We are given that sample of 30 observations is selected from a normal population.
Also, Sample mean, Xbar = 21 and Population Standard deviation, = 6.
Null Hypothesis, : μ <=20
Alternate Hypothesis, : μ > 20
So, Test Statistics we will use here is ;
follows standard normal, N(0,1)
Test statistics = = 0.913 .
<em>Now at 5% level of significance z % table gives the critical value of 1.6449 and our test statistics is less than this as 1.6449 > 0.913. So,we have sufficient evidence to do not reject null hypothesis or accept </em> <em>as our test statistics does not falls in the rejection region because it is less than 1.6449.</em>
Hence we conclude after testing that Population mean, μ<=20.
Answer:
Step-by-step explanation:
Given that,
He makes $10 per hour making sandwiches, and $14 per hour delivering orders.
Let there are s sandwiches and d is delivering orders.
Eric puts half of his total earnings in a savings account for college.
The expression that represents the total amount of money Eric saves for working s hours making sandwiches and d hours delivering orders.
Hence, this is the required solution.