Senior high school students are randomly selected to gather data on the hours spent per day. playing mobile games. The table below shows the probability distribution of X=hours spent playing mobile games. Probability Distribution of X Length (in Hours) Probability 0 0.012 1 0.062 2 0.281 3 0.326 4 ? 5 0.112

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STATISTICS AND PROBABILITY

MULTIPLE CHOICE

Senior high school students are randomly selected to gather data on the hours spent per day. playing mobile games. The table below shows the probability distribution of X=hours spent playing mobile games.

Probability Distribution of X

Length (in Hours) Probability
0 0.012
1 0.062
2 0.281
3 0.326
4 ?
5 0.112
6 0.083

A. Find the missing value for P(X=4) in the given probability distribution.

a. 0.241

b. 0.124

c. 0.142

d. 0.214

 

B. Find the expected value of X, round to the nearest hundredth 

a. 2.66

b. 3.16

c. 1.36

d. 3.61

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