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

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

lo.lll

step-by-step explanation: