Question

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Answer 1

This question is based on difference between population mean where Is unknown. Hence we use t test

The formula that we will use to calculate this is

where sp is the pooled variance. And muR = muC and when you subtract then we get 0.

Hence for the rest category our tcal is

Hence our tcal is 1.924661

ttab = t18 for 5% level of significance and our hypothesis is two tailed.

p value is 0.070234

We calculate using same steps that we used above for 80% O2 consumption

For O2 consumption our tcal is 0.36548

Our p value is 0.718998

Inference:

If tcal < ttab

we accept the null hypothesis Ho

i. e. we reject the alternative hypothesis

There is no significant difference between the sample mean