1. A manufacturing company produces electrical insulators. If the insulators break when in use, a short circuit is likely to occur. To test the strength of the insulators, destructive testing is carried out to determine how much force is required to break the insulators. Force is measured by observing the number of pounds of force applied to the insulator before it breaks. The following data (stored in force) are from 30 insulators subjected to this testing1,870 1,728 1,656 1,610 1,634 1,784 1,522 1,696 1,592 1,6621,866 1,764 1,734 1,662 1,734 1,774 1,550 1,756 1,762 1,8661,820 1,744 1,788 1,688 1,810 1,752 1,680 1,810 1,652 1,736a. At the 0.05 level of significance, is there evidence that the population mean force is greater than 1,500 pounds?b. What assumption about the population distribution is needed in order to conduct the t test in (a)?c. Construct a histogram, boxplot or normal probability plot to evaluate the assumption made in (b).d. Do you think that the assumption needed in order to conduct the t test in (a) is valid? explain
Israel: A Blessing to All Nations
“I will make of you a great nation? And you shall be a blessing? And all the families of the earth shall bless themselves by you” (Gen. 12:2-3). Israel is a blessing to the other nations. As long as Israel succeeds in informing other peoples and proving that Yahweh is God, it will be understood […]
