progress check Unit IV

progress check Unit IV

Assessment

Flashcard

Biology

12th Grade

Practice Problem

Hard

Created by

Wayground Content

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the chi-square test used for?

Back

The chi-square test is used to determine whether there is a significant association between categorical variables.

2.

FLASHCARD QUESTION

Front

What does a chi-square value indicate?

Back

A chi-square value indicates the difference between observed and expected frequencies in a contingency table.

3.

FLASHCARD QUESTION

Front

What is the significance level (p-value) in hypothesis testing?

Back

The significance level (p-value) is the probability of rejecting the null hypothesis when it is actually true, commonly set at 0.05.

4.

FLASHCARD QUESTION

Front

What are degrees of freedom in a chi-square test?

Back

Degrees of freedom in a chi-square test are calculated as (number of categories - 1) for goodness-of-fit tests or (rows - 1) * (columns - 1) for contingency tables.

5.

FLASHCARD QUESTION

Front

What does it mean to reject the null hypothesis?

Back

Rejecting the null hypothesis means that there is sufficient evidence to support the alternative hypothesis.

6.

FLASHCARD QUESTION

Front

What is the critical value in hypothesis testing?

Back

The critical value is the threshold that the test statistic must exceed to reject the null hypothesis.

7.

FLASHCARD QUESTION

Front

What is the role of meiosis in sexual reproduction?

Back

Meiosis is the process that reduces the chromosome number by half, producing gametes for sexual reproduction.

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