(1)The claim is that the proportion of peas with yellow pods is equal to 0.25 (or 25%). The sample statistics from one experiment include 590 peas with 126 of them having yellow pods. Find the value of the test statistic.
(2) The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.35, and the sample statistics include n equals=1209 subjects with 447 saying that they smoked a cigarette in the past week. Find the value of the test statistic
(3) The claim is that the white blood cell counts of adult females are normally distributed, with a standard deviation equal to 3.13. A random sample of 38 adult females has white blood cell counts with a mean of 8.48 and a standard deviation of 3.48. Find the value of the test statistic.
(4) The claim is that the IQ scores of statistics professors are normally distributed, with a mean less than 122. A sample of 28 professors had a mean IQ score of 120 with a standard deviation of 13. Find the value of the test statistic