Given the following hypotheses:
H0: μ = 400 H1: μ ≠ 400
A random sample of 12 observations is selected from a normal population. The sample mean was 407 and the sample standard deviation was 6.
Using the 0.01 significance level:
(a) State the decision rule. (Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places.)
(b) Compute the value of the test statistic. (Round your answer to 3 decimal places.)
(c) What is your decision regarding the null hypothesis?

a. Reject hypothesis if tSTAT  < - 3.106    or t STAT > 3.106

The 99% confidence intervals for the population mean lies between 401.620 and 412.380.

b. The test statistic is 4.042.

Step-by-step explanation:

PLEASE CHECK ATTACHMENT FOR SOLUTION AND STEP BY STEP EXPLANATION

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

on monday rodney ate 1/4th of the sandwich = 3/12

on tuesday he ate 1/3rd of the sandwich = 4/12

therefore in total he has eaten = 3/12 + 4/12 = 7/12

thus we can say that he has eaten 7/12 of the sandwich on monday and tuesday alltogether.

happy to

pls mark as brainliest.