If the chi-square

Group of answer choices

tinfoQ
2021-11-05
Answered

If the chi-square

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Alannej

Answered 2021-11-06
Author has **104** answers

Step 1

The degrey of freedom for:

Rows:$=2=m$

Columns:$=2=n$

$df=(m-1)(n-1)$

Step 2

$df$ of ${\chi}^{2}=(2-1)\times (2-1)=1$

The test statistic${\chi}^{2}=73.7$

The P-value$=0.0000<0.001$

The degrey of freedom for:

Rows:

Columns:

Step 2

The test statistic

The P-value

asked 2022-04-16

Last school year student body local university consisted of 35% freshmen 24% sophomores 26% juniors and 15% seniors. A sample of 300 Students taken from this year’s student body showed the following number of students in each classification. Freshmen 90 Sophomores 60 Juniors 90 Seniors 60 What is the expected frequency of seniors?

A- 65

B- 45

C - 35

D- 55

A- 65

B- 45

C - 35

D- 55

asked 2022-04-22

The following table shows age distribution and location of a random sample of 166 buffalo in a national park.

$\begin{array}{|ccccc|}\hline \text{Age}& \text{Lamar District}& \text{Nez Perce District}& \text{Firehole District}& \text{Row Total}\\ \text{Calf}& 15& 16& 10& 41\\ \text{Yearling}& 12& 11& 10& 33\\ \text{Adult}& 35& 29& 28& 92\\ \text{Column Total}& 62& 56& 48& 166\\ \hline\end{array}$

Use a chi-square test to determine if age distribution and location are independent at the 0.05 level of significance.

1. Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.)

2. What are the degrees of freedom?

Use a chi-square test to determine if age distribution and location are independent at the 0.05 level of significance.

1. Find the value of the chi-square statistic for the sample. (Round the expected frequencies to at least three decimal places. Round the test statistic to three decimal places.)

2. What are the degrees of freedom?

asked 2022-03-03

A bullying prevention program is underway in the phoenix school districts. The researchers ran multiple analyses with the baseline data. The researchers want to determine if there is a relationship between age (13, 14, 15, 16, etc.) and victimization score (measured on a multi-item, Likert scale). What type of statistical test should be used?

Group of answer choices

Chi Square

Independent t-test

Correlation Analysis

Dependent t-test

Standard Deviation

Group of answer choices

Chi Square

Independent t-test

Correlation Analysis

Dependent t-test

Standard Deviation

asked 2022-04-02

Suppose that you are interested in examining the relationship between executive compensation and three independent variables that you believe have an effect: Proficiency in a second language, education level, and work experience abroad. You want to be sure, however, that conditional heteroscedasticity is not present in your data. Therefore, you regress the squared residuals of the regression model onto the three independent variables, and you find that the $R}^{2$ for the regression 0.181. Your sample size of executives is 36.

a. What is the name of the test that is used to determine if conditional heteroscedasticity is present?

b. Using the information provided, calculate the F-statistic that you would use to determine if there is conditional heteroskedasticity present.

c. Using the information provided, calculate the$\chi}^{2$ test statistic (LM method) that you would use to determine if there is conditional heteroskedasticity present.

d. What critical value would you use if you are testing at a 5% significance level using the F-test approach?

e. What critical value would you use if you are testing at a 5% significance level using the$\chi}^{2$ test approach?

a. What is the name of the test that is used to determine if conditional heteroscedasticity is present?

b. Using the information provided, calculate the F-statistic that you would use to determine if there is conditional heteroskedasticity present.

c. Using the information provided, calculate the

d. What critical value would you use if you are testing at a 5% significance level using the F-test approach?

e. What critical value would you use if you are testing at a 5% significance level using the

asked 2022-04-24

IQ scores among the general population have a mean of 100 and a standard deviation of 15. A researcher claims that the standard deviation, o, of IQ scores for males is less than 15. A random sample of 19 IQ scores for males had a mean of 101 and a standard deviation of 10. Assuming that IQ scores for males are approximately normally distributed, is there significant evidence (at the 0.05 level of significance) to conclude that the researcher's claim is correct?

Perform a one-tailed test. Then complete the parts below.

Carry your intermediate computations to three or more decimal places and round your answers as specified below. (If necessary, consult a list of formulas.)

(a) State the null hypothesis$H}_{0$ , and the alternative hypothesis $H}_{1$ ,

$H}_{0$ :

$H}_{1$ :

(b) Determine the type of test statistic to use.

(c) Find the value of the test statistic. (Round to three or more decimal places.)

(d) Find the critical value. (Round to three or more decimal places.)

(e) Can we support the claim that the standard deviation of IQ scores for males is less than 15?

a. Yes

b. No

Perform a one-tailed test. Then complete the parts below.

Carry your intermediate computations to three or more decimal places and round your answers as specified below. (If necessary, consult a list of formulas.)

(a) State the null hypothesis

(b) Determine the type of test statistic to use.

(c) Find the value of the test statistic. (Round to three or more decimal places.)

(d) Find the critical value. (Round to three or more decimal places.)

(e) Can we support the claim that the standard deviation of IQ scores for males is less than 15?

a. Yes

b. No

asked 2022-03-17

Can you provide an example of a chi-square test?

asked 2022-03-16

A sample of n = 100 people is classified into four categories. If the results are evaluated with a chi-square test for goodness of fit, what is the df value for the chi-square statistic?