The mean number of hours per day spent on the phone, according to a national survey, is four 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)

Select one:
a. 4, 2
b. 4, 3
c. 5, 2
d. 5, 3

The new mean is 5.

The new standard deviation is also 2.

Step-by-step explanation:

Let the sample space of hours be as follows, S = {x₁, x₂, x₃...xₙ}

The mean of this sample is 4. That is,

The standard deviation of this sample is 2. That is, .

Now it is stated that each of the sample values was increased by 1 hour.

The new sample is: S = {x₁ + 1, x₂ + 1, x₃ + 1...xₙ + 1}

Compute the mean of this sample as follows:

The new mean is 5.

Compute the standard deviation of this sample as follows:

The new standard deviation is also 2.

c: y > - 1/6x + 1

step-by-step explanation:

dashed line - meaning this < or > also not equal

solid line - meaning this < or > also equal

your answer is c because y > means up & it's shaded up, but y < means down

hope this ! : )

well what did you do it matters what you did : )

step-by-step explanation: