Question

actice 25 In which of the following is the median greater than the mean 8. Consider the following set of 51, 52, 53 56, 56, 57.60, 63,6 flowing, using the l 50Q' a 89 only b. 15 and 89 only 1. Researcheธ studying a pack of gray wolves in North Ameria collected data on the nose to tip of tail, and the weight y, in kilograms af the wolves., A scatterplot of weight versus length revcaled a relationship between the two variables deiscribed as positive, linear, and strong (a) For the situation described above, explain what is meant by each of the following words data collectd from the wolves were used tatate the least-squares eqaation夕=-16.46 + 35.02c (b) Insterpret the meaning of the slope of the least-squares regriession line in context , residnal of 957 kilograms. What was the wecight. of the wolf c) ackeal Leight predict Leight t rei Legkt 2. Researchers investigated the possible beneficial and whether adding possible benefit. Tweaty-four volunteers were randomly assigned to ooe of thred milk to the groups. Every day for a moath, participants in group in group 2 drank two cups of hot black tea with I drank two cups of bot black tea without milk, participants participants in group 3 drank two cups of hot water but ea. At the end of the month, the researchers measured the change in each of the participants' heart bealth () Did the rsearchers conodact an experiment or an observational stady? Bxplain.
Please give interpretation of “strong” in context of the wolves length and weight

Answer 1

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This word "strength" can be interpreted in the following 2 ways:

1. Numerically, the word "strong" here means that the correlation, in absolute terms, is more than +0.80 to +1

2. Subjectively, it means that the strength of relation-ship or association between height and weight is very high

Please note that in correlation we can't decide / claim the direction of association i.e. we can't say that higher height causes more weight. In order words direction of causation can't be commented on.