Question

QUESTION 22.1 POINT Hugo averages 78 words per minute on a typing test with a standard deviation of 5.5 words per minute. Suppose Hugo's words per minute on a typing test are normally distributed. Let X = the number of words per minute on a typing test. Then, X-N(78,5.5). . This score Suppose Hugo types 61 words per minute in a typing test on Wednesday. The 2-score when x = 61 is tells you that x = 61 is standard deviations to the right/left) of the mean Correctly fill in the blanks in the statement above. Select the correct answer below: 61 is -3.091. Suppose Hugo types 61 words per minute in a typing test on Wednesday. The score when This s-score tells you that 61 is 3.091 standard deviations to the left of the mean, 78, Drone DELL

Answer 1

Solution :

From given that ,

z = (x - $\mu$ ) /$\sigma$

= (61 - 78) / 5.5

z = 3.091

The correct option is ,

Suppose Hugo types 61 words per minute in a typing test on Wednesday. The s-score when r = 61 is -3.091. This s-score tells you that = 61 is 3.091 standard deviations to the left of the mean, 78.