What is a standard deviation of all children


Discuss the below:

Q: The participants were randomly assigned to groups 1 and 2

X1                       X2  

34                    45

32                    35

15                    32

27                    28

20                    34                   

1. t =

2. df =

3. For a ONE TAILED TEST, with p < .05, what is the Tabled Value, and is the above t significant or not significant?

4. A "Y Intercept" value of -6.44 is an indication of what?

5. As a sample size gets larger, the t value required for significance is

6. A z score of 1.96 is _________ percent from the center of the normal distribution.

7. The standard deviation of all children aged 8 to 12 is ____ the standard deviation of all children aged 2 to 8.

a. Greater than
b. Less than
c. Equal to

8. One sample has a σ =.56 and one has a σ =.33

Which sample has the larger range?

a. σ =.56
b. σ =.33
c. Neither
d. cannot be determined from the data given

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