The mean number of hours per day spent watching television, according to a national survey, is 3.5 hours, with a standard deviation of two hours. if each time was increased by one hour, what would be the new mean and standard deviation? (2 points)

4.5 hour and 2 hour

Step-by-step explanation:

Given: The mean number of hours per day spent watching television, according to a national survey, is 3.5 hours, with a standard deviation of two hours.

To Find: If each time was increased by one hour, what would be the new mean and standard deviation.

Solution:

let the total numbers entries of hours in survey be   =  

each entry in survey be  =  

mean of survey is     =      =

standard deviation is  =   =

if each entry in survey is increased by one hour then,

each new entry in survey  is =  

the new mean is  =

                                                +

                                              = + 1=

now,

standard deviation is      

putting values,

                                                =

                                         =2

new mean and standard deviation are and