Alyssa has a cell-phone plan that charges a fixed price for each text message, no matter how many she sends. the table below shows the number of text messages alyssa sent and the amounts she was charged for them on her last three bills. using x for the number of text messages sent and y for the amount charged, find the rate alyssa is charged for each text message. alyssa is charged for each text message.

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) =