Suppose that the time spent by children under the age of 12 in front of a screen per year has the N(1500,250); i.e, is Normal with mean μ=1500 and standard deviation σ=250. What proportion of children spend between 1500 and 1750 hours in front of a screen? (Express your answer as a decimal, not a percentage.) A large population of college students were surveyed regarding their uses of technology. One question on the survey was: "How many different social media platforms do you use on a regular basis?" The distribution of responses to this question is Normal, with a mean μ= 3.9 and standard deviation σ= 1.3. What is the percentage of students in this population who use more than 5 social media platforms on a regular business.
Suppose that the time spent by children under the age of 12 in front of a screen per year has the N(1500,250); i.e, is Normal with mean μ=1500 and standard deviation σ=250. What proportion of children spend between 1500 and 1750 hours in front of a screen? (Express your answer as a decimal, not a percentage.)
A large population of college students were surveyed regarding their uses of technology. One question on the survey was: "How many different social media platforms do you use on a regular basis?" The distribution of responses to this question is Normal, with a mean μ= 3.9 and standard deviation σ= 1.3. What is the percentage of students in this population who use more than 5 social media platforms on a regular business.
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