Suppose you want to test if left-handed individuals have a higher IQ than right-handed individuals. You conduct a study from 250 students, of which 140 are left-handed. After subjecting each student to an IQ test, you find that left-handed individuals score 108.3 with a standard deviation of 13.2, and right-handed individuals score 107.1 with a standard deviation of 11.6. The null hypothesis is that left- and right-handed individuals have the same IQ. The alternative hypothesis is that left-handed individuals have higher IQs. Using a size of the test of 5%, what is your conclusion

That is right sorry i was gonna answer but i already saw his

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a.this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b.this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )