study looked at the effects of light on female mice. Fifty mice were randomly assigned to a regimen of 12 hours of light and 12 hours of dark (LD), while another fifty mice were assigned to 24 hours of light (LL). Researchers observed the mice for two years. Two of the LD mice and 16 of the LL mice developed tumours. (You may want to create a table to represent this data.)
Determine the percentage of mice that developed tumours from each group (LL and LD). Compare them and comment.
In the LD mice, ________ % developed tumours. In the LL mice, _________% developed tumours. The LD mice developed tumours at ______ (the same rate as/a lower rate than/a higher rate than) the LL mice.
What is the answer
To determine the percentage of mice that developed tumors from each group (LL and LD), we need to calculate the ratio of mice with tumors to the total number of mice in each group.
First, let's create a table to represent the data:
Group | Number of Mice | Number of Mice with Tumors
--------------------------------------------
LD | 50 | 2
LL | 50 | 16
To find the percentage of mice that developed tumors in each group, we divide the number of mice with tumors by the total number of mice in that group and then multiply the result by 100.
For LD mice:
Percentage of LD mice with tumors = (2 / 50) * 100 = 4%
For LL mice:
Percentage of LL mice with tumors = (16 / 50) * 100 = 32%
Now, let's fill in the missing values in the statement:
In the LD mice, 4% developed tumors. In the LL mice, 32% developed tumors. The LD mice developed tumors at a lower rate than the LL mice.
In conclusion, we observe that the percentage of mice developing tumors in the LL group is significantly higher (32%) compared to the LD group (4%).
To determine the percentage of mice that developed tumors in each group, we can use the following formula:
Percentage = (Number of mice with tumors / Total number of mice) * 100
Given the information provided, we have:
Number of mice with tumors in LD group = 2
Total number of mice in LD group = 50
Number of mice with tumors in LL group = 16
Total number of mice in LL group = 50
Calculating the percentages:
Percentage of mice that developed tumors in LD group = (2/50) * 100 = 4%
Percentage of mice that developed tumors in LL group = (16/50) * 100 = 32%
Therefore,
In the LD mice, 4% developed tumors.
In the LL mice, 32% developed tumors.
Comparing the two groups, we can see that the percentage of mice developing tumors in the LL group (32%) is significantly higher compared to the LD group (4%). Therefore, the LD mice developed tumors at a lower rate than the LL mice.