Answer Happy

Use the following information for the problem. Thirty-two 1-Liter specimens of water were drawn from the water supply for a city and the concentration of lead in the specimen was measured. The average level of lead was 7.3 ug/L, and the standard deviation for the sample was 3.1 ug/L. Using a significance level of 0.05, do we have evidence the mean concentration of lead in the city's water supply is less than 10 ug/L? -The t critical value is (fill in the blank). -If the true mean equals the null mean the probability the test statistic value will be less than the t critical value is _{fill in the blank) - The test statistic value is blank) _{fill in the -You reject the null hypothesis (a) Yes (b) No (c) It is not possible to know if the null hypothesis should be rejected. -Our test result cannot be (a) A correct decision (b) a Type I error (c) a Type Il error -Given below are some possible values for the true mean (given in units of ug/Liter). Which value will give the largest probability of a Type Il error? (a) 7.2 (b) 8.6 (c) 9.4 (d) 11.3 --Given below are some possible values for the true mean (given in units of ug/Liter). Which value will give the smallest probability of a Type II error? (a) 7.2 (b) 8.6 (C) 9.4 d) 11.