P Flag Question Time Left 0 56 34 Four Brands Of Flashlight Batteries Are To Be Compared By Testing Each Brand In Five F 1 (46.95 KiB) Viewed 134 times
P Flag Question Time Left 0 56 34 Four Brands Of Flashlight Batteries Are To Be Compared By Testing Each Brand In Five F 2 (45.4 KiB) Viewed 134 times
P Flag question Time left 0:56:34 Four brands of flashlight batteries are to be compared by testing each brand in five flashlights. Twenty flashlights are randomly selected and divided randomly into four groups of five flashlights each. Then each group of flashlights uses a different brand of battery. The lifetimes of the batteries, to the nearest hour, are as follows. Brand A Brand B Brand C Brand D 42 28 24 20 30 36 36 32 39 31 28 28 28 32 28 28 29 27 33 25 Preliminary data analyses indicate that the independent samples come from normal populations with equal standard deviations. Use the 5% significance level. What is F critical value up to two decimal points? Answer:
Time left 0:56:30 Marked out of 1.00 P Flag question Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). Using the hypothetical data provided below, test whether the mean pressure applied to the driver's head during a crash test is equal for each types of car. Use a = 5%. Use Excel to perform the analysis. What is the F value up to two decimal points? Compact cars Midsize cars Full-size cars 643 469 484 655 427 456 702 525 402 Answer:
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