Normal Distribution: ( Solution with Graph Needed.) A certain function is normally distributed with a mean of 8 and a standard deviation of 2. a). What percentage of observation will be less than 5? b). What percentage of the observation will be greater than 12? c). What percentile of the observation corresponds to 2?

We are to estimate the mean of a population, u. The population variance is o. Both the population mean and varíance are unknown. I have twO suggestions as the estimators shown below, A and A2. Tell which one is better. Show all calculations and arguments. Az=

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Titles Notation v sample mean а. Ро coefficient of determination b. N C. s2 d. V population standard deviation d. o sample standard deviation e. o V sample size f. s mean of a sampling distribution of sample means g. r h. a population variance i. l the proportion found in Ho j. p sample proportion k. x? correlation coefficient l. po population mean m. OF population size n. Ha o. p2 the mean found in the null hypothesis р. р v chi-squared 9. п

Which primary scales do we call ‘categorical data’?   a. Interval, ordinal   he probability of making a type I error is indicated by the ________.   a. p-value   b. power of a test   c. incidence of difference   d. test statistic

B Choosing a topic Sk.. For data that is not normally distributed we can't use z-scores. However, there is an equation that works on any distribution. It's called Chebyshev's formula. The formula 1 where p is the minimum percentage of scores that fall within k k2 is p = 1 - standard deviations on both sides of the mean. Use this formula to answer the following questions. a) If you have scores and you don't know if they are normally distributed, find the minimum percentage of scores that fall within 2.2 standard deviations on both sides of the mean? b) If you have scores that are normally distributed, find the percentage of scores that fall within 2.2 standard deviations on both sides of the mean? c) If you have scores and you don't know if they are normally distributed, how many standard deviations on both sides of the mean do we need to go to have 64 percent of the scores? Note: To answer part c you will need to solve the equation for k.

Can someone please help with D and E? Thank you.