Betty, an employee of a Daycare, read an article in a magazine that said
the average 3yr old child is 37in tall. Betty works with 3yr olds at the
daycare, so later that week, she measured the height of each child who had just
turned or was about to turn 3. Here are their heights in inches: 41, 40,
36, 42, 39, 38, 33, 44, 39, 41.
a.A non directional hypothesis is a type of alternative hypothesis used in statistical significance testing. For a research question, two rival hypotheses are formed. The null hypothesis states that there is no difference between the variables being compared or that any difference that does exist can be explained by chance. The alternative hypothesis states that an observed difference is likely to be genuine and not likely to have occurred by chance alone. Sometimes called a two-tailed test, a test of a nondirectional alternative hypothesis does not state the direction of the difference, it indicates only that a difference existaverage =37 tall
b determine the critical t for a=0.5
:41, 40, 36, 42, 39, 38, 33, 44, 39, 41.
May 25th, 2015
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