If someone wants 10 test if the population mean cost is 30 thousand dollars, the

Question

If someone wants 10 test if the population mean cost is 30 thousand dollars, the alternative is formulated with a) c) notequalto Find the standardized sample mean coat (z statistic) ____ thousand dollars (Your answer should be a number of the form -X.XX or +X.XX.) According to the 68-95-99.7 Rule, the P-value for this two-sided test equals ____(Report your answer as a decimal of the form 0.XXX.) Is there reason to dispute the claim that the population mean cost is 30 thousand dollars? a) yes b) no c) inconclusive; the P-value is on the border of what could be considered small If the hypothesis test is earned out taking 6 thousand dollars to be the sample standard deviation instead of the population standard deviation, the standardized test statistic follows which distribution? a) z b) If the hypothesis test is carried out taking 6 thousand dollars to be the sample standard deviation instead of the population standard deviation, the P-value is a) smaller than the one reported b) larger than the one reported c) the same as the one reported. If a reporter wants to claim that the population mean cost is less than 30 thousand dollars, the P-value would be a) half b) twice c) the same as the one for the test described above

Explanation / Answer

5. option c

6. for this you follow these steps
  

7.P value is the probability of getting this value when mean is 0.

you can calculate it by using the function pnorm(z statistic) in r

8. if p value is smaller than 0.05 . then no. otherwise if larger than 0.5, yes.if equal to 0.5 , no inclusion

i could solve for your given example if you would have given the data,

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