Statistical Applications-BM

The closer r is to 1, the _________ the correlation

• stronger

• weaker

X is a normally distributed variable with a mean μ = 30 & standard deviation σ = 4. Find P(x < 40)

• 0.3944

• .7688

• 0.8944

• 0.9938

When do you reject the null hypothesis?

• When the Chi value is low

• When the P value is high

• When the Chi value is high or the P value is low

• When the Chi value is low or the P value is high

What must be true about the expected values in a chi square test?

• greater than or equal to 2

• greater that or equal to 5

• greater than or equal to 10

• greater than or equal to 30

How many degrees of freedom will be present?

• 7

• 4

• 5

• 6

This table shows the number of babies born on each day of the week. Is there evidence that births are more likely on specific days of the week?

• yes, the P value is less than .05

• yes, the P value is greater than .05

• no evidence, the P value is less than .05

• no evidence, the P value is greater than .05

What is the expected value for females that like Pepsi?

• 14.5

• 6.3

• 11

• 10.5

What are the degrees of freedom for this test?

• 3

• 2

• 6

• 5

Describe the correlation in this graph.

• strong negative

• weak negative

• strong positive

• weak positive

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

• 21 chapters

• 18 chapters

• 15 chapters

• 12 chapters