A manufacturer wants to assess if her new weight-loss cat food is effective. She has two groups of 20 adult cats that are overweight. Group 1 receives two servings of her companies regular adult formula food, while Group 2 receives two servings of her new weigh-loss formula. The table below presents the weight loss the cats experienced over the duration of the experiment. Calculate a t value based on the two treatment groups. Report your t-value as an absolute value (ie, positive number) to 4 decimal places. Sample # Regular Weightloss 1: 4 2 1 7 41 8. 2 9. 2 5 10 11 2 5 12 13 1 14 2 15 2 16 2 17 4 18 1 2 19 20

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.