Question

Different breeds of dogs produce different-sized litters. Wesley believes that his Coonhounds will have litters that are twice as big as his Schnauzers. He has 10 female Coonhounds and the mean size of their most recent litters was 11.0 puppies with a standard deviation of 3.0 puppies. Wesley also has 9 female Schnauzers whose most recent litters had a mean litter size of 5.0 puppies with a standard deviation of 2.0 puppies. Assume that the population variances are not the same. Create and interpret a 90% confidence interval to estimate the true difference between the mean sizes of the litters.

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