Instructions: Please circle the letter that corresponds to your answer, or fill

Question

Instructions: Please circle the letter that corresponds to your answer, or fill in the blank with your answer - please show your work for calculation problems. In a population where . 10932 and that is above the mean by 2 standard deviations? (1 point) 1. 14.52, what z-score corresponds to a score A. 2.00 B. 14.52 C. 29.04 D. 111.32 2. What z-score value separates the lowest 75% of scores in a normal distribution from, the highest 25%? (1 point) A. 0.67 B. -0.67 C. 0.68 D. -0.68 3 For a population with = 75.00 and = 12.00. What is the z-score corresponding to X -92? (1 point) C. 1.42 B. 1.23 4. For a population with -86.50 and 73.5? (1 point) 7.63. What is the z-score corresponding to X A. -0.85 D. -9.63 Using z-scores, a population with = 40.00 and = 5.00 is standardized so that the new 00 and = 10.00. After the standardization, one individual has a score mean is = 50. of X = 43, What was this individual's score in the original distribution? (1 point) A. B. X=43.5 X=56 C. D. X = 36.5 Cannot be determined from the information given. 6. A professor is teaching 3 sections of statistics, and has the following average scores on the final exam, section 1 M1 75.25 (n1-52 students). Section 2 M2-73.62 (n2-20 students), and Section 3 Ms-78.35 (ns-44 students). What is the overall mean for the final exam scores? (1 point) A. 1.96 B. 38.67 C. 76.14 D. 75.74

Explanation / Answer

1. Here z score is to be obtained for x=109.32+2*14.52=138.36

Hence z=(x-mean)/sigma=2

Hence answer is A.

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