Recent questions in Chi-square tests

Chi-square tests
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vidamuhae
2022-11-16

Chi-square tests
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Bayobusalue
2022-11-13

"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 ?

Chi-square tests
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inurbandojoa
2022-11-09

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.

Chi-square tests
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Brianna Schmidt
2022-10-30

How can i calculate the P-value and why is it one-sided?Is that for ${\chi}^{2}$ is a one-tail test?

Chi-square tests
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Stephany Wilkins
2022-10-29

With which realization probability is this or an even greater effect to be expected when the null hypothesis is valid?

Chi-square tests
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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.

$\text{\u25a1}$ or goodness of fit, homogeneity or independence?

Chi-square tests
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dolovatgyp
2022-05-01

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.

Chi-square tests
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compyac
2022-04-30

a. The alternative hypothesis to the null hypothesis stated above must be:

b. If the sample data and the chi-square test computations indicate

c. If the sample data and the chi-square test computations indicate

d. All of the above.

Chi-square tests
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vacinammo288
2022-04-30

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?

Chi-square tests
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Ellie Castro
2022-04-29

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.

(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

(d) Interpret the P-value

(e) What conclusion would you draw?

Chi-square tests
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Kaylee Torres
2022-04-28

In chi-square tests, the conventional and conservative rule is to require that the difference between the observed and expected frequency for each cell be at least 5.

1. True

2. False

Chi-square tests
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albusgks
2022-04-24

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

Chi-square tests
Answered

tefoldaavv
2022-04-24

For the chi-square test of independence, the value of the test statistic is:

a. 2.34

b. 1.62

c. 3.25

d. 4

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