choose yes or no to tell whether the expressions are equivalent.

1. 4(5c + 3) and 9c + 7 yes or no

2. 10f – 10 and 2(8f – 5) yes oe no

3. 12g + 21 and 3(4g + 7) yes or no

4. 6(4j – 6) and 24 – 36j yes or no

Atest of sobriety involves measuring the subject's motor skills. a sample of 31 randomly selected sober subjects take the test and produce a mean score of 64.4 with a standard deviation of 2. a claim is made that the true mean score for all sober subjects is equal to 65. for each part below, enter only a numeric value in the answer box. for example, do not type "z =" or "t =" before your answers. round each of your answers to 3 places after the decimal point. (a) calculate the value of the test statistic used in this test. test statistic's value = (b) use your calculator to find the p-value of this test. p-value = (c) use your calculator to find the critical value(s) used to test this claim at the 0.2 significance level. if there are two critical values, then list them both with a comma between them. critical value(s) =