Question

According to a survey conducted by Deloitte in 2017, 0.4844 of U.S. smartphone owners have made an effort to limit their phone use in the past. In a sample of 65 randomly selected U.S. smartphone owners, what is the probability that less than 35 will have attempted to limit their cell phone use in the past?

Question 2 options:

1)

0.0338

2)

0.2272

3)

0.7728

4)

0.8404

5)

0.0676

Answer 1

Here we have asked to find probability less than 35 and binomial distribution is discrete distribution.

Hence we can write P(x< 35 ) = P( x 34 )

That is x will take values from 0 to 34.