A random sample of 10 speed skaters, all of the relatively same experience and speed, were selected to try out a new specialty blade.The difference in the short track times were measured as current blade time – specialty blade time, resulting in mean difference of 0.165 second with a standard deviation equal to 0.12 second. Does this sample provide sufficient reason that the specialty blade is beneficial in achieving faster times? Use a = 0.05 and assume normality.
Answer to relevant QuestionsThe corrosive effects of various soils on coated and uncoated steel pipe were tested by using a dependent sampling plan. The data collected are summarized by n = 40 _d ∑ 220and ∑d2 = 6222 where d is the amount of ...Ten randomly selected college students who participated in a learning community were given pre–self-esteem and post–self-esteem surveys. A learning community is a group of students who take two or more courses together. ...Two independent random samples resulted in the following: Sample A: nA = 24 sA = 8.5 Sample B: nB = 21 sB = 11.3 Find the estimate for the standard error for the difference between two means. Approximately 95% of the sunflowers raised in the United States are grown in the states of North Dakota, South Dakota, and Minnesot a. To compare yield rates between North and South Dakota, 11 sunflower-producing counties ...For the hypothesis test involving Ha: m B = m A 0, with df = 18 and t = 1.3: a. Find the p-value. b. Find the critical values given a = 0.05.
Post your question