SOMEBODY PLZ HELP ME. I NEED THIS SO BAD OR IM GOING TO FAIL. SOMEBODY PLZ. ANYBODY I KNOW SOMEBODY CAN HELP ME.

Step-by-step explanation:

    Data values:

Question 1: What is the mean? The standard deviation?

The mean = the average = all of the data values added together and then divided by the number of data values.

The standard deviation= the average of the squared differences from the mean.

To find standard deviation:

          Ex: You have 5 data values, 600, 470, 170, 430, and 300.

                 The mean of these data values is

Mean calculations: All of the data values added together= 50+57+57+60+60+60+60+65+65+65+72+72+72+75+75+75+75+75+75+75+75+75+75+75+75+77+77+77+77+77+77+77+77+77+77+81+81+81+81+81+81+83+83+83+83+83+83+88+88+88+88+88+88+88+88+88+90+90+90+90+90+90+90+90+90+90+90+90+92+92+92+92+92+92+92+92+92+92+92+92+95+95+99+99+99+99+100+100+100+100+100=7531

Number of data values: 91

7531/91= 82.75824175 = 82.8

The mean is 82.8.

Standard deviation:

11.34347 (sample)

11.28097 (population)

Let's go with population because this appears to be all of the grades.

11.28097 is the standard deviation (population).

Part 2: Explain how to find the standard deviation.

1. Find the mean.

2. For each data value (number), subtract the mean and square the difference (result)

3. Find the mean of those differences.

Part 3: The data values are very spread out.

Hope this helps!

step-by-step explanation:

i found the life tables for the year 2012. 

life table of males at age 30. probability of dying between ages x and x+1

total population:  

29–30 . . . . . . . . . . . . 0.001030

30–31 . . . . . . . . . . . . 0.001061

males:  

29–30 . . . . . . . . . . . . 0.001420

30–31 . . . . . . . . . . . . 0.001448

white population

29–30 . . . . . . . . . . . . 0.001005

30–31 . . . . . . . . . . . . 0.001037

white males

29–30 . . . . . . . . . . . . 0.001372

30–31 . . . . . . . . . . . . 0.001399

non hispanic white population

29–30 . . . . . . . . . . . . 0.001083

30–31 . . . . . . . . . . . . 0.001116

non hispanic white males

29–30 . . . . . . . . . . . . 0.001477

30–31 . . . . . . . . . . . . 0.001503

jacob, non hispanic white male. 30 years old.

probability that jacob lives to be 30 years old. 

since the given probabilities are probabilities of dying, i think we simply subtract it from 1 to get the probability of living. we will use the probability of non hispanic white male.

                                          probability of living to be 30 y.o.

29 - 30 : 1 - 0.001477 = 0.998523

30 - 31 : 1 - 0.001503 = 0.998497

pi x^2

step-by-step explanation:

pi times x squared