A dieter believes that the average number of calories in a homemade peanut better cookie is more than the average number of calories in a store-bought peanut better cookie. which excel statements will estimate the difference in mean calories between the two types of cookies using a 90% confidence interval. the data are: homemade store-bought sample size 40 45 mean number of calories 180 179 standard deviation 2 4
a. = (180-179) + (1.96) (0.6749), and = (180-179) - (1.96) (0.6749)
b. = (180-179) + (1.645) (0.6749), and = (180-179) - (1.645) (0.6749)
c. = (45-40) + (1.96) (0.6749), and = (45-40) - (1.96) (0.6749)
d. = (45-40) + (1.645) (0.6749), and = (45-40) - (1.645) (0.6749)
e. none of the above.
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