Question

The two-way frequency table represents data from a survey asking mall visitors whether they like seafood, meat, or both.

A 4-column table with 3 rows. The first column has no label with entries seafood, not seafood, total. The second column is labeled meat with entries 16, 20, 36. The third column is labeled not meat with entries 31, 5, 36. The fourth column is labeled total with entries 47, 25, 72.

Which is the joint relative frequency for mall visitors who like seafood and meat?

StartFraction 5 Over 72 EndFraction
StartFraction 16 Over 72 EndFraction
StartFraction 20 Over 72 EndFraction
StartFraction 31 Over 72 EndFraction
he dot plot shows the number of words students spelled correctly on a pre-test.

A number line going from 2 to 11. 0 dots are above 2. 0 dots are above 3. 1 dot is above 4. 2 dots are above 5. 4 dots are above 6. 4 dots are above 7. 3 dots are above 8. 2 dots are above 9. 2 dots are above 10. 0 dots are above 11.
Which statement best describes the shape of the graph?

The graph is skewed right.
The graph is nearly symmetrical.
The graph is skewed left.
The graph is perfectly symmetrical.
A conditional relative frequency table is generated by row from a set of data. The conditional relative frequencies of the two categorical variables are then compared.

If the relative frequencies are 0.48 and 0.52, which conclusion is most likely supported by the data?

There is likely an association between the categorical variables because the relative frequencies are similar in value.
An association cannot be determined between the categorical variables because the relative frequencies are similar in value.
An association cannot be determined between the categorical variables because the relative frequencies are not similar in value.
There is likely an association between the categorical variables because the relative frequencies are both close to 0.50.
hich value for R in the table would most likely indicate an association between the conditional variables?

0.09
0.10
0.13
0.79
A store manager is looking at past jewelry sales to determine what sizes of rings to keep in stock. The list shows the ring sizes purchased by the last ten jewelry customers.

9, 7, 6.5, 7.5, 7, 8, 5, 6, 7.5, 8
What is the variance of the data set? Round to the nearest hundredths.

0.40
0.72
1.15
2.14

Answer 1

1) 16/72 (StartFraction 16 Over 72 EndFraction)

2) The graph is nearly symmetrical.

3) An association cannot be determined between the categorical variables because the relative frequencies are similar in value.

4) 0.79

5) 1.15