The Ohio Dairymen\'s Association is incensed by California\'s recent ad campaign

Question

The Ohio Dairymen's Association is incensed by California's recent ad campaign, and wishes to determine if happy cows really do come from California. They decide to measure this by recording the number of "moos per cow per hour" of 30 randomly selected herds in California, and do the same for 35 randomly selected herds in Oio. They would like to compare the mean number of moos per cow per hour for California cows and Ohio cows. What testing procedure would help to answer this question - why?

One-sample t-test, matched pairs t-test, sign test, 2 sample t-test, rank sum test, ANOVA F-test, or simple linear regression?

Explanation / Answer

Test Procedure: Two sample t-test.

Here

i) two populations are there, First population is "California cows" and second population is "Ohio cows".

ii) Sample sizes n1 and n2 are different.

iii) Sample observations are independent

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