Number 73 a question? A. We know from the given that X bar one is different. 29 Expert rates work to 21 some in the region. One is they put 2 59 on the division toe to, and one is able before to seven and into his equal to total 7 33 Ah, the hypothesis is a little mind and the mean and standard deviation off the difference. So actually triple toe me and one is able to get into or new to Ah, alternative high persons is that you want or mean one is bigger than I mean toe. So first we have to remind the days a distance of statistics, which is equal to export. 1 29 when its expert too over the square hood and it's one of squared over in one bus is to square. We're ah into, but she's sneaker through to Brian 646 because in one degree or freedom, we know that it's equal toe in one minus one. Pour into minus two. Everyone valley between these boards, really, which is 4 to 6, which is being a van 100. So when you was hungry, but you really re present is it was 200. Ah, and Roy using table B be very. Is a probability off painting there in the value of the test statistic or a value more of ST to be very in the number in the column title off given I v containing the T value in the row off degree is equal to 200 eso we figure out that be value lies between and I was when you 0.5, open toe five Accordingly, we know that the value is smaller events significance level. So we're inject, we need drachma Mohadi processes and our significance level is open profile. So our final answer would be that yes, it is a sufficient evidence that was aboard. I mean that Ah coach, students beings more on the average, then unfortunate and courtship. Ah, students for 73 b, we can Ah, this is answer for what should be Ah question. Be so expert. One is the sample mean eso the conditions If we are trying to find ah, the confidence interval Ah, so ah, by using Ah, it's a minority store. Uh, my business degree of freedom is equal to 200 and confidence interval 99%. So what you start is equal toe 4.62 receipts and and the margin The margin of error The margin bring have at it is equal to, um be You are a month and Ryan boy. So it's two stories 2.626 for a growing boy, a square hoods Bang. This one is squared, which is 59 squared over in run is to square squaring being cool. So with the immersion, really, the error is seven point mine be Brian seven eso the confidence in your ability to remind the points We know that in points is ableto mean one minus mean cool minus Ah, uh, margin of error, which is Syrian mine convenient mine seven. So is equal to no 0.6 or three, the other in point. You've ah, famer's. The last one difference on Lee is it's plus, So I have to find an answer for bad things being point mine being around seven. But these are the in points for confidence interval equal to 99% uh, to answer, question and work. Which in being and for question, see ah, for questions, see our answer will be and no Ah, the confidence in turn of, ah, allies very close. And you and less does brunch seem, ah to be he lowers being yours mean for a court chain, then Fortune forces do not seen worth being for.