Statistics Practice

Find the degrees of freedom.

• 4
• 5
• 6
• 7

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

• Injury type is correlated to position played.

If the χ² _critical value = 5.99 and the

χ² _calculated value = 7.35, what is the conclusion

• Reject Ho, accept H1

• Accept Ho, reject H1

• there is not enough info to decide

• The conclusion can only be made if we also know the p-value

Four data sets are shown below.
Set 1: {10, 19, 38, 50, 51}
Set 2: {5, 21, 26, 39, 51}
Set 3: {9, 38, 50, 50, 51}
Set 4: {5, 28, 28, 28, 51}
Which data set has the largest standard deviation?

• Set 1
• Set 2
• Set 3
• Set 4

In a population of five university students with GPAs of 2.5, 2.3, 1.7, 1.4, and 1.1, a sample of three students are considered. What would be the standard deviation of the resulting sampling distribution?

• 0.53

• 0.41

• 0.35

• 0.22

What does variance represent?

• How many different variations are in the data set.

• How the population varies compared to the sample.

• How spread out each data value is from the mean.

• The range, but with a bunch of other stuff going on.

Tags

NGSS.HS-LS3-3

• There is no equation for standard deviation

Spongebob has analyzed how many Krabby Patties he has made over the past week:

55, 62, 78, 66, 90, 101, 99

What is Spongebob's mean and standard deviation?

• mean = 75.5

  SD = 16.6

• mean = 78.7

  SD = 17.1

• mean = 81.1

  SD = 18.2

• mean = 72.2

  SD = 15.3

Tags

NGSS.HS-LS3-3

What t-test type compares the means for two groups?

• Paired Samples

• Independent

• Dependent

• Mixed