Last year the records of Dairy Land Inc., a convenience store chain, showed the mean amount spent
by a customer was $30. A sample of 40 transactions this month revealed the mean amount spent was
$33. Assume that the population standard deviation, o, is known and equal to $12. At the 0.05
significance level, can we conclude that the mean amount spent has increased? What is the p-value?
Follow the five-step hypothesis testing procedure.

Danielle has $127.02 in her account before making any transactions. over the course of a week, danielle makes the following transactions: transaction debit ($) credit ($) birthday check 75.00 night out 66.14 garage sale proceeds 121.58 charitable donation 42.25 doctor’s appointment 115.30 at the end of the week, how much money is in danielle’s account? a. $99.91 b. $27.11 c. $184.41 d. $142.16 select the best answer from the choices provided a b c d

Simone claims the initial value and y-intercept are the same thing on a graph. is she correct? if you know that a line has a slope of and a y-intercept of 7, what is the equation for that line in slope-intercept form?

3x + 4y = 5 x- 3y = -7 solve by substitution