Answer:
The probability that 35 or more from this sample used Google Chrome as their browser is 0.9838.
Step-by-step explanation:
We are given that according to Statcounter, the Google Chrome browser controls 62.8% of the market share worldwide.
A random sample of 70 users was selected.
Let = <u><em>sample proportion of users who used Google Chrome as their browser.</em></u>
The z-score probability distribution for the sample proportion is given by;
Z = ~ N(0,1)
where, = sample proportion = = 0.50
p = population proportion = 62.8%
n = sample of users = 70
Now, the probability that 35 or more from this sample used Google Chrome as their browser is given by = P( 0.50)
P( 0.50) = P( ) = P(Z -2.14)
= P(Z 2.14) = <u>0.9838</u>
The above probability is calculated by looking at the value of x = 2.14 in the z table which has an area of 0.9838.