Mary works in a factory that produces t1000 telephones each day. when 30 phones were sampled, it was found that 9 were defective. estimate how many telephones are defective each day.

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deandrescott91 deandrescott91 · Answer 1 · 2017-05-22T19:53:02+02:00

3/10 of phones are found defective each day. If 1,000 telephones are produced each day, about 300 of them will be defective.

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oeerivona oeerivona · Answer 2 · 2020-04-30T02:18:14+02:00

Answer:

The estimated number of defective phones produced each day is 0.3×t1000

Step-by-step explanation:

The proportion of phones that were found defective is given by the following equation

Proportion of defective phone = (Number of defective phone)÷(Number of sampled phone)

∴ Proportion of defective phone = 9÷30 = 3÷10 = 0.3 or 30%

Therefore, based on the proportion, if t1000 telephones are produced, the estimated number of defective phones produced each day will be as follows

Proportion of defective phone × Number of produced phone

= 0.3 × t1000

The estimated number of defective phones produced each day = 0.3×t1000.