In a comparison of the strengths of concrete produced by four experimental mixes, three specimens were prepared from each type of mix. Each of the 12 specimens was subjected to increasingly compressive loads until breakdown. The accompanying table gives the compressive loads, in tons per square inch, attained at breakdown. Specimen numbers 1-12 are indicated in parentheses for identification purposes.
Mix A
Mix B
Міх с
Mix D
1)
(1) 2.30 (2) 2.30 (3) 2.15 (4) 2.25
4
(5) 2.20 (6) 2.10 (7) 2.05 8 (8) 2.25
(9) 2.35 (10) 2.20 (11) 2.20 (12) 2.25

Calculate the test statistic. (Round your answer to two decimal places.)

State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to two decimal places.)

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)