Test the claim that on average, heights (in feet) of oak trees in a forest are more than heights of pine trees. Use a = 0.01. %3D It is known that tree heights follow a normal distribution. The table below shows the results of two random samples. Туре Oaks 16 76 14.6 Pines 16 75 13.5 1. The fact that heights are known to be normally distributed is important in this test because: O this is a Z-test both sample sizes are less than thirty

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Permutations and Combinations

If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.

Counting Theory

The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.