hypothesis test?

Question

I don't understand what the question is trying to ask but i guess it should be asking for certain hypothesis test.

Use an appropriate hypothesis test to decide, at the 10% level of significance, whether the mean ozone reading at the given time in this city is less than 10 ppm. Indicate clearly the test statistic you are using and any assumptions you have made
What hypothesis test is it asking for?

Answer 1

You did not give a precision .what has been found in the test, how many experiments were made?

Answer 2

You must use " t " Student test at a level of significance of 10%

Answer 3

you utilize the z-try while the inhabitants variance is time-venerated. you utilize the t-try if all you have is the pattern variance. in case you had the inhabitants variance that would desire to probably recommend which you have documents on the finished inhabitants and you does not would desire to do any hypothesis attempting out on the grounds which you will possibly have the somewhat recommend. The t-dist could be formed with the aid of dividing a prevalent established with the aid of the sqrt(chi sq. divided with the aid of its df) (undergo in innovations that in case you sq. a prevalent established N(0,a million) you get a chi sq. with a million df) so permit Z= (Xbar - mu)*sqrt(n)/sigma V = Summation(Xi-Xbar)^2/sigma^2 once you do the branch notice that the sigma's (pop prevalent deviation) cancel out and thanks to this we don't would desire to comprehend the pop variance while employing the t-try. far greater powerful than Z because of this.

Answer 4

It might mean "Using an appropriate hypothesis, test to decide,...