progress check Unit IV

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.

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.

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.

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.

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.

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.

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.

Front

What is the difference between homologous chromosomes and sister chromatids?

Back

Homologous chromosomes are pairs of chromosomes (one from each parent) that are similar in shape and size, while sister chromatids are identical copies of a single chromosome connected by a centromere.

Front

What is aneuploidy?

Back

Aneuploidy is a condition in which the number of chromosomes is not an exact multiple of the haploid number, often resulting from errors in meiosis.

Front

What is the significance of the chi-square goodness-of-fit test?

Back

The chi-square goodness-of-fit test assesses how well observed data fit a specific distribution or model.