# Chi-Square Tests Questions & Answers

Recent questions in Chi-square tests
Owen Mathis 2022-11-20

### Why is sample size important when analyzing data?

vidamuhae 2022-11-16

### When performing a log-likelihood ratio test, do I take log to both of the likelihood first or find the ratio first and take the log?

Bayobusalue 2022-11-13

### In question I do not get any sigma, I know I can do the t student test based on degrees on freedom if I do not have the population st.dev, but in my case I do not even have the sample st.dev, can it be solved or the teacher made a mistake in the text ?"The maturation time of maize plants follows the normal distribution. We follow 30 plants and it is seen that they reach maturity in 4 months. Construct a 95% confidence interval for the maturation time of the maize plant population."In order to find the margin of error i still need S (the sample st.dev) no ?Otherwise how can i proceed ? Chi squared ?

inurbandojoa 2022-11-09

### A restaurant offers 7 different dishes and predicts the dishes will be ordered in the following proportions: 1 (25%), 2 (20%), 3 (10%), 4 (15%), 5 (5%), 6 (6%), 7 (15%).I am then given the actual proportions in which the dishes are ordered and asked to conduct the appropriate hypothesis test to determine whether the owners' belief regarding the order proportions is correct, then find the p-value (or bounds for the p-value) associated with this test statistic. If I do need to put bounds on the p-value, I'm unsure of how I would go about doing that.

Joglxym 2022-11-04

### What is the shape of a chi-squared distribution?

varsa1m 2022-10-30

### What is a chi-squared distribution?

Brianna Schmidt 2022-10-30

### this ${\chi }_{1}^{2}=1.41$ is associated with a one-sided P-value between 0.10 and 0.15How can i calculate the P-value and why is it one-sided?Is that for ${\chi }^{2}$ is a one-tail test?

Stephany Wilkins 2022-10-29

### For how many degrees of freedom is the test statistic proved of significance?With which realization probability is this or an even greater effect to be expected when the null hypothesis is valid?

theprettyshopper7 2022-06-21
2022-05-15

2022-05-14
2022-05-09

### A political pollster selects a random sample of 75 registered voters from Allegheny County, Pennsylvania. The city of Pittsburgh is in Allegheny County. The pollster is interested in determining if the distribution of political party preference among registered voters in this county differs between those who live in Pittsburgh and those who live in the suburbs. The responses are displayed in the table.  The pollster would like to know if these data provide convincing evidence of a relationship between residential status and political party in the population of all registered voters in Allegheny County. The random and 10% conditions are met, and this table of expected counts shows that all expected counts are at least 5.What is the value of the chi-square test statistic for this test?χ‑2 = 2.64χ‑2 = 2.83χ‑2 = 6.95χ‑2 = 8.03

Deven Livingston 2022-05-03

### Random-digit-dialing telephone surveys used to exclude cell phone numbers. If the opinions of people who have only cell phones differed from those of people who have landline service, the poll results may not represent the entire adult population. The Pew Research Center interviewed separate random samples of cell-only and landline telephone users who were less than 30 years old and asked them to describe their political party affiliation.$\text{□}$ or goodness of fit, homogeneity or independence?

dolovatgyp 2022-05-01

### Resources O Hint Press Esc to exit full screen Are younger people more likely to be vegan/vegetarian? To investigate, the Pew Research Center classified a random sample of 1480 U.S. adults according to their age group and whether or not they are vegan/vegetarian.Determine which chi-square test is appropriate for the given setting. Which response below gives the correct test with appropriate reasoning?a. Chi-square goodness of fit test because the data came from a single random sample with the individuals classified by their chocolate consumption.b. Chi-square test for homogeneity because the data come from two independent random samples – those who are vegan/vegetarian and those who are not.c. Chi-square test for homogeneity because the data came from a single random sample with the individuals classified according to two categorical variables.d. Chi-square test for independence because the data came from a single random sample with the individuals classified according to two categorical variables.e. Chi-square test for independence because the data come from two independent random samples – those who are vegan/vegetarian and those who are not.

compyac 2022-04-30

### Let ${p}_{1}$= population proportion for population 1, ${p}_{2}$= population proportion for population 2, ... and ${p}_{k}$= population proportion for population k. Consider the following null hypothesis: ${H}_{0}$: ${p}_{1}$=${p}_{2}$=...=${p}_{k}$. Which of the following statements is correct?a. The alternative hypothesis to the null hypothesis stated above must be: ${H}_{\alpha }$: Not all population proportions are equal.b. If the sample data and the chi-square test computations indicate ${H}_{0}$ cannot be rejected, we cannot detect a difference among the k population proportions.c. If the sample data and the chi-square test computations indicate ${H}_{0}$ can be rejected, we have the statistical evidence to conclude that one or more population proportions differ from the other population proportions.d. All of the above.

vacinammo288 2022-04-30

### Provide a thorough response to the two following questions.1. What is hypothesis testing? Provide all basic components, including error types, with explanations.2.What is the difference between chi-square goodness of fit and chi-square test of independence? What do they have in common?

Ellie Castro 2022-04-29

### I need answer full parts to the question. Show all work and be neat. Show all conditions, and p-value, conclusion, anything under the 4 step statistical process. Thanks!It can be difficult to motivate preschoolers to practice writing letters. Perhaps a reward system will do the trick, but what type of rewards work? Here are the data from a randomized experiment that compared three treatments among children in preschool. A “success" means that the child completed a worksheet in which they traced the entire alphabet in one sitting.$\begin{array}{|cccc|}\hline \text{Group}& \text{Reward}& \text{Subjects}& \text{Successes}\\ 1& \text{Choice of a small toy}& 20& 13\\ 2& \text{Choice of candy}& 24& 18\\ 3& \text{Promise of immediate recess}& 16& 10\\ \hline\end{array}$(a) Which chi-square test is appropriate in this setting? Explain your reasoning(b) State the appropriate hypotheses for performing a chi-square test in this setting.(c) The chi-square test statistic is ${\chi }^{2}=0.847$. Calculate the P-value.(d) Interpret the P-value(e) What conclusion would you draw?

Kaylee Torres 2022-04-28