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2 years ago

Math help can’t solve please

Mathematics

1 answer:

frez [133]2 years ago

7 0

Answer:

See below

Step-by-step explanation:

a) 43.8 - 38 = 5.8 yrs

b) SD = 8.9 yrs 5.8 / 8.9 = .6517 SD <u> below</u> the mean

(A z score merely shows how many standard deviations a score (age) is above or below the mean in SD units)

c) Z = - .6517 Negative because it is <u>BELOW</u> the mean ( FYI from z-score table: this is .2578 in percentage )

d) usual ( it (-.6517) is between -2 and + 2 )

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