9. Explain if the following are true or false; absent an explanation that substa

Question

9. Explain if the following are true or false; absent an explanation that substantiates the true-false answer, zero points will result.

9.1   Given any distribution’s mean and standard deviation, the Z transform can be used to convert it to N(0,1)

9.2   The continuity correction is only needed when converting a small size Binominal distribution to a normal distribution

9.3   As is increased, the confidence interval is increased

9.4   In substituting the normal for the Binominal, mean 37 and standard deviation 2, the probability that a random observation inclusively is between 30 and 40 = normCDF(30,40,37,2)

9.5   With the Normal distribution, equal X or Z interval lengths yield equal probability

9.6   The t and z distributions always differ irrespective of the sample size

9.7   The z and chi square distributions have nothing in common and are unrelated

9.8   To test the population proportion parameter, it is sufficient that Np equal or exceed 10

9.9   The Central Limit Theorem applies principally (almost exclusively) to normal populations

9.10   The following illustrates nothing: invNorm(normCDF(-, Xo,,))

Explanation / Answer

Solution:

9.1 True

yes it is because for use Z transform you need the mean and standard deviation

9.3 false

because that is the error if you have a minor error you will get more confidence interval

9.4 False

for use the binomila you need to use probability of success and fail

9.5 true

because Z is a standarization of any distribution

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