Sales personnel for skillings distributors submit weekly reports listing the customer contacts made during the week. a sample of 75 weekly reports showed a sample mean of 19.5 customer contacts per week. the sample standard deviation was 5.3. provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel.

1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2

step-by-step explanation:

i am only able to answer the first part. i am not sure about the second part. sorry

2 x 503

step-by-step explanation:

its 1006

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15