160 people are asked how many siblings they have, and the results are shown below: # of Siblings
Frequency
34
0
Relative Frequency Cumulative Frequency
0.2125
34
0.175
62
1
28
2
29
91
0.1813
0.2375
3
38
129
4
a. Complete the table (Use 4 decimal places when applicable)
b. What percent of the people have exactly two siblings?

Nathan is an ecologist. he’s studying the effect of secondary consumers on primary consumers. his current research focuses on a population of blue jays and crows. they eat caterpillars and mice. if the number of blue jays increases, what are the likely effects on other populations? 1the number of crows will increase. 2the number of mice will decrease. 3the number of mice will remain the same. 4the number of caterpillars will decrease.