The owner of a local golf course wants to examine the difference between the average ages of males and females that play on the golf course. Specifically, he wants to test if the average age of males is greater than the average age of females. If the owner conducts a hypothesis test for two independent samples and calculates a p- value of 0.8875, what is the appropriate conclusion? Label males as group 1 and females as group 2. 1) We did not find enough evidence to say the average age of males is larger than the average age of females. 2) We did not find enough evidence to say a significant difference exists between the average age of males and females. 3) The average age of males is less than or equal to the average age of females. 4) We did not find enough evidence to say the average age of males is less than the average age of females. 5) The average age of males is significantly larger than the average age of females.

The critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample data is z = -1.90, what is the correct statistical decision?​

Typically, only very brave students are willing to speak out in a college classroom. Student participation may be especially difficult if the individual is from a different culture or country. The article “An Assessment of Class Participation by International Graduate Students” (Journal of College Student Development) considered a numerical “speaking-up” scale, with possible values from 3 to 15 (a low value means that a student rarely speaks). For a random sample of 64 males from Asian countries where English is not the official language, the sample mean and standard deviation were 8.75 and 2.57, respectively. Suppose that the mean for the population of all males having English as their native language is 10 (suggested by data in the article). We want to find whether the population mean for males from non-English speaking Asian countries is smaller than 10. A) State the sign of the alternative hypothesis. _________________(type one of these 3 choices:   greater than, less than, or not…

Suppose an instructor would like to know if there is difference in the performance of her two courses of 560 students each. She proceeds to take a random sample of size 50 from each independent class and was able to establish the following results: mean SD Class 1 86 17 Class 2 78 15 Is there a significant difference between the two classes at a significance level of five percent?