Ahypothesis will be used to test that a population mean equals 7 against the alternative that the population mean does not equal 7 with known variance σ. what are the critical values for the test statistic upper z subscript 0 for the significance level of 0.04? round your answer to two decimal places (e. g. 98.76).

i would you but i don't under stand the qustion

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -