1. Maria has the following scores in her math class: 86 75 97 58 94 and 58 a: Find the mean median and mode
b: Should Maria’s math teacher use median or exam mode to convince Maria that she should study more regularly?
2. A researcher tagged 40 giant tortoises in 2008. In 2009, she returned and captured 50 tortoises, 16 of which were tagged. in 2010 she returned and caught 30 turtles of which 8 were tagged.
a: Using a proportion to estimate the turtle population for 2009
b: Use a proportion to estimate the turtle population for 2010
3. You ask students about their opinion of the quality of food served in the school cafeteria. You decide to only interview students who buy a hot meal on a given day. Is the sample random? Explain. 2)
organize your information…
tagged
*2008: 40
*2009: 16
*2010: 8
total grip
*2009: 50
*2010: 30
Now you can compare them. Like that, let’s use the first one. You can compare the ratio of 16/40 = 50 / x
where x is the total population
So basically the above proportion represents that 16 of the 40 tagged were captured and it is proportional to the number of turtles captured out of the entire population of turtles that were currently there in 2009.
Now you can cross multiply to get this…
16/40= 50/x
16x = 2000
then divide by 16
x = 125
125 represents the total population
Set up the other proportion like this and you should be able to get the 2010 population as well. There are other ways to set it up if you want to experiment for yourself.
Hope this helped. Anonymous, I’m with you, I read this and had to leave. There’s no possible way I could ever put that in my own words. Im already a very slow learner. And these answers don’t help at all LOL. And besides, a lot of things are happening because I just lost my grandfather. I NEED HELP!!!!!!! sorry for your loss and i think its a year late to say it
1)
*Mode: Which score occurs the most (the one that repeats the most – ex. = 1,1,1,2,2,3 = since 1 is repeated three times, this makes it the number that repeats the most, so this is the mode of the set)
*Median: put the numbers in order from smallest to largest, then cross out the numbers from either end until you get to the middle (ex: 1,2,3,4,5 = 2.3, 4 = 3, so the median in this set is 3)
*Average: just add all the numbers together and divide by the number of numbers (ex. 1,2,3,4,5,6 – sum=42, 42/6=7, so the average is 7 since their total sum is 42 and the total number of numbers is 6)
You can compare the numbers you got by solving these aspects and see which is the lowest because it is the one the teacher will have to use to convince Maria. 3)
Your poll is not random because you selected a particular day and a particular student (the one who buys a hot meal) their opinion. Doing so will skew or render the poll inaccurate as only a certain group of people on a certain day were asked to give their opinion. Instead, sample grouping should have been done to allow different types of people (e.g., the type of people who sometimes or always bring lunch home) over the course of several days to be interviewed, which allows for greater precision and assurance of the random nature of the survey. . uh…..…….. ok me from the future hEhE