Question 1

A random sample of 5 observations was drawn from a normal population.These were: 18,16,10,13,and 23.Test the hypotheses: H₀: $\sigma ^ { 2 } \leq 20$ H₁: $\sigma ^ { 2 } > 20$ at the 10% significance level. Test statistic = ____________________ Critical Value = ____________________ Conclusion: ____________________ Interpretation: _________________________________________________

Accepted Answer

The answer of A random sample of 5 observations was...

Question 2

A random sample of 5 observations was drawn from a normal population.These were: 18,16,10,13,and 23.Estimate the population variance with 90% confidence.
Lower value = ____________________
Upper value = ____________________

Accepted Answer

The answer of A random sample of 5 observations was...

Question 3

Hypotheses
In testing the hypotheses:
HS1U1B10S1U1B0: $\sigma ^ { 2 } = 0.01$ HS1U1B11S1U1B0: $σ ^ { 2 } \neq 0.01$ a random sample of 10 observations was drawn from a normal population,and the sample standard deviation was 0.043.
-Determine the rejection region at the 5% significance level.

Accepted Answer

The answer of Hypotheses
In testing the hypotheses:
HS1U1B10S1U1B0: \(\sigma ^ {...

Question 4

In order to examine whether a sample could have come from a given type of population distribution (e.g.,the normal distribution),chi-square analysis involves the comparison of a table of ______________________________ Oij with a table of ______________________________ Eij that has been constructed under the assumption that the null hypothesis is true.

Accepted Answer

The answer of In order to examine whether a sample...

Question 5

What is the rationale for df = (r - 1)(k - 1)in conducting a chi-square test of independence for a contingency table with r rows and k columns?

Accepted Answer

The answer of What is the rationale for df =...

Question 6

A sample of size 20 is used to obtain the following statistics: $\sum x _ { i } = 4363$ and $\Sigma \mathrm { x } _ { i } ^ { 2 } = 953,180$ Can we conclude at the 1% significance level that the population variance is less than 100?
Hypotheses:
Test statistic = ____________________
Critical Value = ____________________
Conclusion: _________________________
Interpretation: __________________________________________________

Accepted Answer

The answer of A sample of size 20 is used...

Question 7

Hypotheses
In testing the hypotheses:
HS1U1B10S1U1B0: $\sigma ^ { 2 } = 0.01$ HS1U1B11S1U1B0: $σ ^ { 2 } \neq 0.01$ a random sample of 10 observations was drawn from a normal population,and the sample standard deviation was 0.043.
-What is the conclusion?

Accepted Answer

The answer of Hypotheses
In testing the hypotheses:
HS1U1B10S1U1B0: \(\sigma ^ {...

Question 8

In preparing a confidence level for a population variance,the size of the sample is 12,and the level of confidence is 0.90.What are the appropriate table values for this interval?
____________________ and ____________________

Accepted Answer

The answer of In preparing a confidence level for a...

Question 9

In preparing a confidence level for a population variance,the size of the sample is 13,and the level of confidence is 0.90.What are the appropriate table values for this interval?
____________________ and ____________________

Accepted Answer

The answer of In preparing a confidence level for a...

Question 10

In what way are the chi-square and normal distributions related?

Accepted Answer

The answer of In what way are the chi-square and...

Question 11

A sample of size 20 is used to obtain the following statistics: $\sum x _ { i } = 4363$ and $\Sigma \mathrm { x } _ { i } ^ { 2 } = 953,180$ Estimate the population variance with 98% confidence.
Lower value = ____________________
Upper value = ____________________

Accepted Answer

The answer of A sample of size 20 is used...

Question 12

Using the chi-square distribution,along with sample data and frequency counts,what will we be able to examine?

Accepted Answer

The answer of Using the chi-square distribution,along with sample data...

Question 13

In carrying out a chi-square goodness-of-fit test,what are the "k" and "m" terms in the "df = k - 1 - m" expression and why is each term present?

Accepted Answer

The answer of In carrying out a chi-square goodness-of-fit test,what...

Question 14

In preparing a confidence level for a population variance,the size of the sample is 13 and the level of confidence is 0.95.What are the appropriate table values for this interval?
____________________ and ____________________

Accepted Answer

The answer of In preparing a confidence level for a...

Quiz 13: Chi-Square Applications

A random sample of 5 observations was drawn from a normal population.These were: 18,16,10,13,and 23.Estimate the population variance with 90% confidence. Lower value = Upper value =

Hypotheses In testing the hypotheses: H₀: $\sigma ^ { 2 } = 0.01$ H₁: $σ ^ { 2 } \neq 0.01$ a random sample of 10 observations was drawn from a normal population,and the sample standard deviation was 0.043. -Determine the rejection region at the 5% significance level.

In order to examine whether a sample could have come from a given type of population distribution (e.g.,the normal distribution),chi-square analysis involves the comparison of a table of Oij with a table of Eij that has been constructed under the assumption that the null hypothesis is true.

What is the rationale for df = (r - 1)(k - 1)in conducting a chi-square test of independence for a contingency table with r rows and k columns?

Hypotheses In testing the hypotheses: H₀: $\sigma ^ { 2 } = 0.01$ H₁: $σ ^ { 2 } \neq 0.01$ a random sample of 10 observations was drawn from a normal population,and the sample standard deviation was 0.043. -What is the conclusion?

In preparing a confidence level for a population variance,the size of the sample is 12,and the level of confidence is 0.90.What are the appropriate table values for this interval? and

In preparing a confidence level for a population variance,the size of the sample is 13,and the level of confidence is 0.90.What are the appropriate table values for this interval? and

In what way are the chi-square and normal distributions related?

A sample of size 20 is used to obtain the following statistics: $\sum x _ { i } = 4363$ and $\Sigma \mathrm { x } _ { i } ^ { 2 } = 953,180$ Estimate the population variance with 98% confidence. Lower value = Upper value =

Using the chi-square distribution,along with sample data and frequency counts,what will we be able to examine?

In carrying out a chi-square goodness-of-fit test,what are the "k" and "m" terms in the "df = k - 1 - m" expression and why is each term present?

In preparing a confidence level for a population variance,the size of the sample is 13 and the level of confidence is 0.95.What are the appropriate table values for this interval? and

Quiz 13: Chi-Square Applications

A random sample of 5 observations was drawn from a normal population.These were: 18,16,10,13,and 23.Estimate the population variance with 90% confidence. Lower value = ____________________ Upper value = ____________________

What is the rationale for df = (r - 1)(k - 1)in conducting a chi-square test of independence for a contingency table with r rows and k columns?

Hypotheses In testing the hypotheses: H0: σ2=0.01\sigma ^ { 2 } = 0.01σ2=0.01 H1: σ2≠0.01σ ^ { 2 } \neq 0.01σ2=0.01 a random sample of 10 observations was drawn from a normal population,and the sample standard deviation was 0.043. -What is the conclusion?

In preparing a confidence level for a population variance,the size of the sample is 12,and the level of confidence is 0.90.What are the appropriate table values for this interval? ____________________ and ____________________

In preparing a confidence level for a population variance,the size of the sample is 13,and the level of confidence is 0.90.What are the appropriate table values for this interval? ____________________ and ____________________

In what way are the chi-square and normal distributions related?

Using the chi-square distribution,along with sample data and frequency counts,what will we be able to examine?

In carrying out a chi-square goodness-of-fit test,what are the "k" and "m" terms in the "df = k - 1 - m" expression and why is each term present?

In preparing a confidence level for a population variance,the size of the sample is 13 and the level of confidence is 0.95.What are the appropriate table values for this interval? ____________________ and ____________________

A random sample of 5 observations was drawn from a normal population.These were: 18,16,10,13,and 23.Estimate the population variance with 90% confidence. Lower value = Upper value =

Hypotheses In testing the hypotheses: H₀: $\sigma ^ { 2 } = 0.01$ H₁: $σ ^ { 2 } \neq 0.01$ a random sample of 10 observations was drawn from a normal population,and the sample standard deviation was 0.043. -What is the conclusion?

In preparing a confidence level for a population variance,the size of the sample is 12,and the level of confidence is 0.90.What are the appropriate table values for this interval? and

In preparing a confidence level for a population variance,the size of the sample is 13,and the level of confidence is 0.90.What are the appropriate table values for this interval? and

In preparing a confidence level for a population variance,the size of the sample is 13 and the level of confidence is 0.95.What are the appropriate table values for this interval? and