Question
Attempts: Keep the Highest: /7 48. Frequency distribution tables Aa Aa The kangaroo rat, found in the more arid regions of the western and southwestern United States, is almost perfectly adapted to life in the desert. A kangaroo rat can survive without ever drinking any water by getting needed moisture from seeds. It has pouches on the outside of its cheeks, which it uses to carry seeds back to its burrow A researcher is studying spatial memory in kangaroo rats by running the rats through a radial arm maze designed to measure spatial learning and memory. Each rat's score is equivalent to the number of arms of the radial arm maze it investigates. A higher score indicates a rat that is more curious and therefore more spatially intelligent. Figure 1: A radial arm maze © Lynn Talton, 2008, Reprinted by permission from the UCLA Behavioral Testing Core Facility. Website: http://btc.bol.ucla.edu/ram.htnm On the first day, the researcher runs 10 kangaroo rats, which receive the following scores: 6 4 5 4 6 4 8 7 5 4 Fill in the missing values in the following frequency distribution. Table 1: Scores of Kangaroo Rats Arms Investigated Frequency
Explanation / Answer
Using kangaroo Table:
Frequency refers to the number of times repeated a specific value.
Second Table
How many Naked mole rats investigated more than seven? Morethan 7 is only 8
Answer: 5
The no of naked mole rats that investigated more than seven arms is 5 times the number of kangaroo rats
How many naked mole rats used?
Sum of frequncy= 20
Answer: 20
Kangaroo Rats Arms Investigated Frequency 4 4 5 2 6 2 7 1 8 1 Sum 10
