Question 1

The z test assumes knowledge of the two population parameters, the mean and the standard deviation.

Accepted Answer

A) True 
 B)False

Question 2

Each point on the abscissa of the distribution of sample means represents

Accepted Answer

A)  a parameter 
B)  a statistic 
C)  the sampling error 
D)  the population error 
A)  a parameter 
B)  a statistic 
C)  the sampling error 
D)  the population error

Question 3

The standard deviation of the population of adult female height scores is 3 inches. A random sample of 50 women yields a mean height of 64 inches. Calculate the standard error of the mean. 95

Accepted Answer

The answer of The standard deviation of the population of...

Question 4

The probability of obtaining a random sample mean which is lower than the population mean is

Accepted Answer

A)  1.00 
B)  0 
C)  .50 
D)  none of these, since a sample mean can never be lower than a population 
A)  1.00 
B)  0 
C)  .50 
D)  none of these, since a sample mean can never be lower than a population

Question 5

The z test assumes that the sample's standard deviation equals the standard error of the mean.

Accepted Answer

A) True 
 B)False

Question 6

If 10 Omega University students were selected out of the total population of 6000, and median IQ for this small group equaled 118, then this value of 118 would constitute a

Accepted Answer

A)  statistic 
B)  population 
C)  sample 
D)  parameter 
A)  statistic 
B)  population 
C)  sample 
D)  parameter

Question 7

The mean of the entire distribution of sample means represents

Accepted Answer

A)  a parameter 
B)  a statistic 
C)  the sampling error 
D)  none of these 
A)  a parameter 
B)  a statistic 
C)  the sampling error 
D)  none of these

Question 8

The sampling distribution of means assumes normality only when

Accepted Answer

A)  all samples are randomly selected 
B)  all samples have been selected from a single population 
C)  the samples represent groups of sufficient size 
D)  all of these 
A)  all samples are randomly selected 
B)  all samples have been selected from a single population 
C)  the samples represent groups of sufficient size 
D)  all of these

Question 9

The standard deviation of the population of individually measured adult male spine lengths is 1.02 inches. A random sample of 25 men is selected and the mean spine length was recorded at 30 inches.
a. Calculate the standard error of the mean.
b. Test the hypothesis that this sample could be representative of the general population of adult males whose mean spine length is known to be 28 inches.

Accepted Answer

A.SEm= .20

Question 10

A researcher in the area of IQ wishes to measure a sample of children using the WISC III. The standard deviation on the WISC-III is 15. How large a sample should be selected if the researcher wishes to be .95 accurate to within 3 IQ points?

Accepted Answer

96.04 or 9

Question 11

The probability estimates provided by inferential statistics are only necessary when

Accepted Answer

A)  the population values are unknown 
B)  the parameters are given 
C)  the population values are provided 
D)  none of these 
A)  the population values are unknown 
B)  the parameters are given 
C)  the population values are provided 
D)  none of these

Question 12

Predicting the characteristics of an entire group, after having measured a small group, is the major goal of

Accepted Answer

A)  probability theory 
B)  descriptive statistics 
C)  measurement theory 
D)  inferential statistics 
A)  probability theory 
B)  descriptive statistics 
C)  measurement theory 
D)  inferential statistics

Question 13

The z test assumes that

Accepted Answer

A)  the sample mean is equal to the population mean 
B)  the standard deviation of the sample scores is equal to the standard deviation of the distribution of sample means is normal 
C)  the distribution of sample means is normal 
D)  none of these, since the z test is "assumption free" 
A)  the sample mean is equal to the population mean 
B)  the standard deviation of the sample scores is equal to the standard deviation of the distribution of sample means is normal 
C)  the distribution of sample means is normal 
D)  none of these, since the z test is "assumption free"

Question 14

The major error in inferential statistics is to commit the "sampling error".

Accepted Answer

A) True 
 B)False

Question 15

When the standard deviation of the entire distribution of random sample means had been calculated, the resulting value is called

Accepted Answer

A)  the deviation score 
B)  the parameter mean 
C)  the standard error of the mean 
D)  sampling error 
A)  the deviation score 
B)  the parameter mean 
C)  the standard error of the mean 
D)  sampling error

Question 16

True population may never be infinite.

Accepted Answer

A) True 
 B)False

Question 17

With a known population mean of 68 and a known standard error of the mean of 2.58, what is the probability of selecting at random a sample whose mean is 70 or greater?

Accepted Answer

The answer of With a known population mean of 68...

Question 18

The sum total of all registered voters in Canada represents

Accepted Answer

A)  the population of potential Canadian voters 
B)  a parameter 
C)  statistic 
D)  sampling error 
A)  the population of potential Canadian voters 
B)  a parameter 
C)  statistic 
D)  sampling error

Question 19

For the z test, the null hypothesis states that the sample and parameter means are equal.

Accepted Answer

A) True 
 B)False

Question 20

When the sampling distribution of means is randomly selected from an entire population of individual scores, the highest and lowest individual scores

Accepted Answer

A)  become lost through averaging 
B)  must be arbitrarily eliminated before the sampling distribution becomes available 
C)  assume the characteristics of parameters 
D)  produce a bimodal distribution 
A)  become lost through averaging 
B)  must be arbitrarily eliminated before the sampling distribution becomes available 
C)  assume the characteristics of parameters 
D)  produce a bimodal distribution

The z test assumes knowledge of the two population parameters, the mean and the standard deviation.

Each point on the abscissa of the distribution of sample means represents

The standard deviation of the population of adult female height scores is 3 inches. A random sample of 50 women yields a mean height of 64 inches. Calculate the standard error of the mean. 95

The probability of obtaining a random sample mean which is lower than the population mean is

The z test assumes that the sample's standard deviation equals the standard error of the mean.

If 10 Omega University students were selected out of the total population of 6000, and median IQ for this small group equaled 118, then this value of 118 would constitute a

The mean of the entire distribution of sample means represents

The sampling distribution of means assumes normality only when

A researcher in the area of IQ wishes to measure a sample of children using the WISC III. The standard deviation on the WISC-III is 15. How large a sample should be selected if the researcher wishes to be .95 accurate to within 3 IQ points?

The probability estimates provided by inferential statistics are only necessary when

Predicting the characteristics of an entire group, after having measured a small group, is the major goal of

The z test assumes that

The major error in inferential statistics is to commit the "sampling error".

When the standard deviation of the entire distribution of random sample means had been calculated, the resulting value is called

True population may never be infinite.

With a known population mean of 68 and a known standard error of the mean of 2.58, what is the probability of selecting at random a sample whose mean is 70 or greater?

The sum total of all registered voters in Canada represents

For the z test, the null hypothesis states that the sample and parameter means are equal.

When the sampling distribution of means is randomly selected from an entire population of individual scores, the highest and lowest individual scores

Introduction to Statistics

Percentages, Graphs and Measures of Central Tendency

Measures of Variability

The Normal Curve and Z Score

Z Scores, T Scores and Other Normal Curve Transformations

Probability

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters

Exam 7: Statistics and Parameters

The z test assumes knowledge of the two population parameters, the mean and the standard deviation.

Each point on the abscissa of the distribution of sample means represents

The standard deviation of the population of adult female height scores is 3 inches. A random sample of 50 women yields a mean height of 64 inches. Calculate the standard error of the mean. 95

The probability of obtaining a random sample mean which is lower than the population mean is

The z test assumes that the sample's standard deviation equals the standard error of the mean.

If 10 Omega University students were selected out of the total population of 6000, and median IQ for this small group equaled 118, then this value of 118 would constitute a

The mean of the entire distribution of sample means represents

The sampling distribution of means assumes normality only when

A researcher in the area of IQ wishes to measure a sample of children using the WISC III. The standard deviation on the WISC-III is 15. How large a sample should be selected if the researcher wishes to be .95 accurate to within 3 IQ points?

The probability estimates provided by inferential statistics are only necessary when

Predicting the characteristics of an entire group, after having measured a small group, is the major goal of

The z test assumes that

The major error in inferential statistics is to commit the "sampling error".

When the standard deviation of the entire distribution of random sample means had been calculated, the resulting value is called

True population may never be infinite.

With a known population mean of 68 and a known standard error of the mean of 2.58, what is the probability of selecting at random a sample whose mean is 70 or greater?

The sum total of all registered voters in Canada represents

For the z test, the null hypothesis states that the sample and parameter means are equal.

When the sampling distribution of means is randomly selected from an entire population of individual scores, the highest and lowest individual scores

Introduction to Statistics

Percentages, Graphs and Measures of Central Tendency

Measures of Variability

The Normal Curve and Z Score

Z Scores, T Scores and Other Normal Curve Transformations

Probability

Parameter Estimates

The Fundamentals of Research Methodology

The Hypothesis of Difference

The Hypothesis of Association: Correlation

Analysis of Variance

Nominal Categorical Data and the Chi Square

Regression Analysis

Repeated-Measures and Matched-Subjects Designs Interval Data

Non-Parametrics Revisited: the Ordinal Case

Tests and Measurements

Filters