STA
The df associated with evaluating the significance of robtare ____.
N-2
A statistic is defined as ____.
a number calculated on sample data that quantifies a characteristic of the sample
The confidence interval for the population mean is ____.
a range of values which probably contains the population mean
"Brand of soft drink" is measured on a(n) ____.
nominal scale
For X + Y = Z, X equals ____.
z-y
How many t distributions are there?
one for each value of df
At the annual sailing regatta, prizes are awarded for 1st, 2nd, 3rd, 4th, and 5th place. These "places" comprise a(n) ____.
ordinal scale
Refer to Exhibit 1-1. The average (mean) number of seizures for the 150 epileptics would be called a ____.
parameter
Refer to Exhibit 1-1. The 150 epileptics constitute a ____.
population
To avoid unknown, systematic factors that may bias the results of an experiment, the experimenter should select a ____ sample from a population and use controlled conditions.
random
Reaction time in seconds is an example of a(n) ____ scale.
ratio
The 95% confidence interval of the mean for = 13.0, s = 1.6, and N = 21 is ____.
12.27 to 13.73
Refer to Exhibit 13-1. Using α = 0.011 tail, the appropriate critical value is ____.
-2.423
If r = 0.84 and N = 5, the value of tobt for the test of the significance of r is ____.
2.68
Exhibit 2-1 X1 = 1, X2 = 4, X3 = 5, X4 = 8, X5 = 10 Given the above data of Exhibit 2-1, evaluate Σ X2.
206
Exhibit 2-1 X1 = 1, X2 = 4, X3 = 5, X4 = 8, X5 = 10 Given the above data of Exhibit 2-1, evaluate Σ X.
28
Where 3X = 9, what is the value of X?
3
When rounded to two decimal places, the number 3.175000 becomes ____.
3.18
1/X + 2/X equals ____.
3/x
Refer to Exhibit 13-1. The df for determining tcrit = ____.
40
What are the real limits of the observation of 6 seconds (measured to the nearest second)?
5.5-6.5
Exhibit 2-1 X1 = 1, X2 = 4, X3 = 5, X4 = 8, X5 = 10 Given the data of Exhibit 2-1, evaluate (Σ X)2.
784
Refer to Exhibit 1-1. The number of seizures for each of the 150 epileptics are called ____.
Data
Refer to Exhibit 1-1. The number of seizures for each of the 20 subjects are called ____.
Data
X = Y/Z can be expressed as ____.
Y = (Z)(X)
X(Z + Y) equals ____.
ZX + YX
As N increases becomes a ____ estimate of .
better
Refer to Exhibit 1-1. The number of seizures for each subject is an example of a(n) ____.
dependent variable
For a given N, the interval that bounds the population mean at the 99% confidence level is ____ that which bounds the population mean at the 95% confidence level
greater than
When using the t test, we reject H0 ____.
if | tobt | ≥ 3| tcrit |
Refer to Exhibit 1-1. The new drug is an example of a(n) ____.
independent variable
The variable that the experimenter manipulates is called the ____.
independent variable
Refer to Exhibit 1-1. The 20 subjects constitute a ____.
sample
In inferential statistics the object is usually to generalize from a ____ to a ____.
sample; population
In acquiring knowledge the method that employs logic, reasoning and objective assessment is referred to as ____.
scientific method
Which of the following variables has been labeled with an incorrect measuring scale?
self-rating of anxiety level by students in a statistics class - ratio
Refer to Exhibit 1-1. The average (mean) number of seizures for the 20 subjects is called a ____.
statistic
Descriptive statistics are helpful in ____ and ____ raw data.
summarizing; characterizing
"Degrees of freedom" for any statistic is defined as ____.
the number of scores that are free to vary in calculating the statistic
The dependent variable in an experiment is defined as ____.
the variable the experimenter measures to determine if there is a real effect
Refer to Exhibit 13-1. The obtained value of the appropriate statistic for testing H0 is ____.
tobt = −2.07
