Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
What is the chi-squared test used for in genetics?
to measure the differences between observed experimental results and expected theoretical outcomes
to identify the genes responsible for a particular trait
to predict the outcomes of a genetic cross
to determine the genetic makeup of an organism
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Which of the following is NOT a criterion for using the chi-squared test?
large sample size
using percentages or rates
discrete data categories
using raw counts
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What does acceptance of the null hypothesis in a chi-squared test suggest?
the differences between the observed and expected frequencies are due to a factor other than chance
the observed results are not as expected
the differences between the observed and expected frequencies are due to chance
there is a significant difference between the observed and expected results
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How would you calculate the degrees of freedom for a chi-squared test in genetics?
the number of phenotypes minus two
the number of phenotypes minus one
the total number of phenotypes
the number of phenotypes plus one
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What should you do if the chi-squared statistic is greater than the critical value at the chosen probability level?
recalculate the chi-squared statistic
accept the null hypothesis
reject the null hypothesis
increase the sample size
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What does the null hypothesis in a chi-squared test assume?
there is a significant difference between observed and expected results
the observed results are not due to chance
the observed results are exactly as expected
there is no significant difference between observed and expected results
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What does the alternative hypothesis in a chi-squared test propose?
the expected results are not due to chance
there is no significant difference between observed and expected results
the observed results are exactly as expected
there is a significant difference between observed and expected results
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What does it mean if the chi-squared statistic is less than the critical value at the chosen probability level?
the differences between the observed and expected frequencies are due to chance
there is a significant difference between the observed and expected results
the differences between the observed and expected frequencies are due to a factor other than chance
the observed results are exactly as expected
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What is the purpose of squaring the difference between observed and expected numbers in the chi-squared test?
to make all differences positive
to increase the difference
to decrease the difference
to make all differences negative
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What does a low chi-squared value suggest in a genetic cross?
the observed results are likely due to chance
the observed results are exactly as expected
the observed results are not likely due to chance
the observed results are not as expected
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