Chi square test

Find the degrees of freedom.

• 4
• 5
• 6
• 7

Which test would you use to see if gender is a factor choosing a person’s favorite fruit?  900 college students were surveyed and their favorite fruit recorded.

• Chi-square Goodness of Fit Test
• Chi-Square Test for Homogeneity
• Chi-Square Test for Independence/Association
• Not a Chi-square test

What are the expected counts of a female who likes Pepsi?

• 10.5
• 11
• 14.5
• 6.3

What is the null hypothesis?

• Injury type is independent of position played
• Injury type is dependent on the position played independent

What is the

χ² _calculated value for the following situation.

• 6.65

• 6.66

• 0.00991

• 1

If we are testing at a 5% significance level and our p-value is 0.00453, what is the conclusion?

• Accept Ho

• Reject Ho

• We need to know chi-squared

• You cannot do this problem without a calculator

Find the chi-squared calculated value for the table.

• 0.486170447

• 1.442392006

• 1.45

• 2

Given that a student is male, what is the probability that maths is their favorite?

• 0.491

• 0.225

• 0.443

• .508

For a p-value from the calculator of 1.32355E-3 what would the conclusion be if testing at 10% significance level?

• Accept Ho

• Reject H1

• Reject Ho

• Need to know the chi-squared number

All current-carrying wires produce electromagnetic (EM) radiation, including the electrical wiring running into, through, and out of our homes. High-frequency EM radiation is thought to be a cause of cancer. The lower frequencies associated with household current are generally assumed to be harmless. To investigate the relationship between current configuration and type of cancer, researchers visited the addresses of a random sample of children who had died of some form of cancer (leukemia, lymphoma, or some other type) and classified the wiring configuration outside the dwelling as either a high-current configuration (HCC) or a low-current configuration (LCC). Computer software was used to analyze the data. 

The expected count of cases of lymphoma in homes with an HCC is

• None of the above