Question

A survey showed that 81% of adults need correction (eyeglasses, contacts, surgery, etc.) for their eyesight. If 9 adults are randomly selected, find the probability that at least 8 of them need correction for their eyesight. Is 8 a significantly high number of adults requiring eyesight correction?

The probability that at least 8 of the 9 adults require eyesight correction is_____

(Round to three decimal places as needed.)

.

Answer #1

**SOLUTION:**

From given data,

**A survey showed
that 81% of adults need correction (eyeglasses, contacts,
surgery, etc.) for their eyesight. If 9 adults are randomly
selected, find the probability that at least 8 of them need
correction for their eyesight. Is 8 a significantly high number of
adults requiring eyesight correction**

from binomial distribution probability that at least 8 of the 9 adults require eyesight correction is

Where

P(X > 8)=P(X=8)+P(X=9)

= 0.467

as probability of 8 or more of them need correction for their eyesight is less then 0.05 level ; therefore it is a significantly high number of adults requiring eyesight correction out of 9

.

A survey showed that 79% of adults need correction
(eyeglasses, contacts, surgery, etc.) for their eyesight. If 15
adults are randomly selected, find the probability that at least
14 of them need correction for their eyesight. Is 14 a
significantly high number of adults requiring eyesight
correction?
The probability that at least 14 of the 15 adults require
eyesight correction is___ (Round to three decimal places as
needed.)

A survey showed that 80% of adults need correction
(eyeglasses, contacts, surgery, etc.) for their eyesight. If 15
adults are randomly selected, find the probability that at least
14 of them need correction for their eyesight. Is 14 a
significantly high number of adults requiring eyesight
correction?

A survey showed that 84% of adults need correction
(eyeglasses, contacts, surgery, etc.) for their eyesight. If 22
adults are randomly selected, find the probability that no more
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significantly low number of adults requiring eyesight correction?
The probability that no more than 1 of the 22 adults require
eyesight correction is nothing. (Round to three decimal places as
needed.)

A survey showed that 72% of adults need correction
(eyeglasses, contacts, surgery, etc.) for their eyesight. If 19
adults are randomly selected, find the probability that no more
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significantly low number of adults requiring eyesight
correction?
The probability that no more than 1 of the 19 adults require
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A
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surgery, etc.) for their eyesight. if 15 adults are randomly
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Based on a? poll, 40?% of adults believe in reincarnation.
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