ADJUSTMENTS QUIZ 2

1.

1 point

standard deviation is

a quantity calculated to indicate the extent of deviation for a group as a whole.

the average calculated for a group

2.

1 point

sample variance is

a part of a population from a population

the entire group of a population

3.

1 point

_____ -A FUNCTION OR SET OF RULES , DOES NOT DEPEND ON UNKOWN PARAMETERS, FOR INTERPRETING OR ORGANIZING DATA.

STATISTIC

BLUNDER

SYSTEMATIC

TEST STATIC

4.

1 point

Mathematical and Stochastic models used in adjustment are a based set of assumptions

True

False

5.

1 point

_________ hypothesis is a statment to be accepted if the first statement H0 fails

Critical value

Alternative

Null

6.

1 point

________ hypothesis is a statement to be rejected

Alternative

Null

Critical value

7.

1 point

two types of hypothesis are made in stochastic models

null hypothesis

alternative hypothesis

critical value

8.

1 point

Type 1 errors are

Null hypothesis is true, but rejected the probability is α

Null Hypothsess is false , but Null is accepted the probability is β

9.

1 point

population variance is

defined as all members of a sample A MEASURE OF THE PRECISION OF A SET OF POPULATION

defined as a part of a sample USED TO MEASURE ACCURACY

10.

1 point

the hypotheses of stochastic models and mathematical models are

no blunders

math model gives a correct relationship between relationship and parameters

chosen stochastic model for observations approriately describes the properties of observations

11.

1 point

_______ refers to 1-d parameters. these errors follow a normal curve area under the standard normal density function

Trivariate

Divariate

Univariate

12.

1 point

______-IS A QUANTITY CALCULATED FROM SAMPLE

STATISTIC

TEST STATISTIC

CRITICAL VALUE

13.

1 point

There are 4 steps to uni-variate hypothesis testing they are

state hypothesis

select significance level and determine critical values

choose appropriate test statistic: normalize value, confidence level

Make decision, reject or accept Ho

14.

1 point

Type 2 errors are

Null hypothesis is true, but rejected the probability is α

Null Hypothsess is false , but Null is accepted the probability is β

15.

1 point

RANDOM ERRORS are

the mathematical error that occurs in nature

is the fluctuating part of the overall error that varies from measurement to measurement.

16.

1 point

_______= THE SQUARE ROOT OF POPULATION VARIANCE

STANDARD ERROR

POPULATION STANDARD DEVIATION

17.

1 point

________-FOR A HYPOTHESIS TEST-TEST STATISTIC COMPARED WITH THIS TO ACCEPT OR REJECT A NUMBER

RANDOM ERRORS

CRITICAL VALUE

STATISTIC