Question

25 Anormal population - 0 - 8. A random sample and scores from 54 Wurthe-wore for this sample is population has a mean of 24. A random sample of 4 scares is obtained from a mal population with probability of obtaining met greater than 22 for this sample! - 20 and a t West - 20 the following samples is deur likely to be obtained For normal perelation with a Band for a sample of n = 4 X- 5 for a sample -4 linl In and -10. Which of the following samples would for a sinple of A dom sample is obtained from a population with Save the larges. 2-GUIC! 1-2 winx - 52 125 with R-84 P 27. lus, then the probability to the sample mean will have a 2-score If a sample is selected from a normal p rower than 2005 1 caso de mine without knowing the samples TRUE OR FALSE 2. True ir a sample of a u 30 nes is randomly selected from a moral population, the sample ma will be equal to the population en 29. According to the Cemal Limit Theorem, the pred value for a sample om approaches to as the sampic site approaches Infinity 30 t e tis posible for the distribution of sample to be oral gven if it is based on samples with less than - 30. Ci the Paoud is normal 31. False Theme of the distribution of samme is called De errar of Me 32. true The standard error of M provides a measure of the distance, on a i na mpe man and the population mean. 33. The distribution of sample near fused on ples of n = 36 selected from a population with and -20 will have an expected value of ko. 4 T o e The standard erre will always be less than or equal to the standard deviation 35. True The mandard error of Man never be greater than the ward deviation of the population from which the es seine 36. Tyne A sample mean with a score value between - 50 and +0.50 would be considered a faaly Typical 37. TYULA sample me with a score value greater than 300 would be considered an extreme, representative sample. 3. In order to reduce the standard error by one all, you m ince the sample sten) by a factor of 4 39. Tyve researcher obtained - 37 for a sample of n - 16 ores selected from a population with 30 and 12. This sample meat corresponds to a score of 1.9 40. ause Ifa sample mean corresponds to a core values , then you can chade that the sample mean is relatively close to the population mean. bare When SFC ...

Answer 1

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23. Z-score = (54-50)/8 = 0.5

24. P(X>22) = P(Z > (22-20)/(4/sqrt(4)) = P(Z>2/2) = P(Z>1.0) = 1-0.84134 (using a standard cumulative normal table) = 0.15866

25. For this question, I am assuming it's asked which values are least likely to be obtained. The answer should be X=88 with n=25

26. Answer is d. z-value = (84-80) / (10/sqrt(100)) = 4