Question: CONVERTING A NORMAL RANDOM VARIABLE TO A STANDARD NORMAL VARIABLE AND VICE-VERSA. 1. Leslie got a score of 68 in an examination she participated. The

CONVERTING A NORMAL RANDOM VARIABLE TO A STANDARD NORMAL VARIABLE AND VICE-VERSA.

1. Leslie got a score of 68 in an examination she participated. The corresponding z-value of her score is -1.40 and the result of the mean is 75. Find the standard deviation.

2. Mrs. Bastillada conducted a test survey about determining the current level of students' learning on Geometry. After checking the test questionnaires, she was amazed that a student attained 50 correct answers. What is the corresponding z-value of the student's score if the sample mean of the test results was 45 and standard deviation is 6?

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