I need some help on the test. My grades an F and I’m trying to raise it. I’m not asking for the answers but I’m asking for a website or something that can help me through and get a good grade on this. Thank you! The first question is
What are the mean,median,mode, and range of the data set given the altitude of lakes in feet:
-12,-9,-14,-39,-49,-18,-43?
To find the mean, median, mode, and range of a data set, you can follow these steps:
Step 1: Arrange the data set in numerical order:
-39, -49, -43, -18, -14, -12, -9
Step 2: Calculate the mean:
Mean = Sum of all values / Total number of values
Mean = (-39 + -49 + -43 + -18 + -14 + -12 + -9) / 7
Mean = -184 / 7
Mean = -26.29 (rounded to two decimal places)
Step 3: Calculate the median:
The median is the middle value of the data set when arranged in numerical order. Since there are seven values, the middle value is the fourth value.
Median = -18
Step 4: Calculate the mode:
The mode is the value that appears most frequently in the data set. In this case, there is no mode because every value appears only once.
Mode = None
Step 5: Calculate the range:
The range is the difference between the highest and lowest values in the data set.
Range = Highest value - Lowest value
Range = -49 - (-9)
Range = -49 + 9
Range = -40
Therefore, in the given data set, the mean is -26.29, the median is -18, the mode is None, and the range is -40.
To find the mean, median, mode, and range of a given data set, you can follow these steps:
1. Mean: Add up all the numbers in the data set and divide the sum by the total number of values. The mean represents the average value.
2. Median: Arrange the numbers in ascending order and find the middle value. If there is an odd number of values, the median is the middle number. If there is an even number of values, the median is the average of the two middle numbers.
3. Mode: Identify the number(s) that appear most frequently in the data set. The mode is the value(s) that occur(s) with the highest frequency.
4. Range: Find the difference between the largest and smallest values in the data set.
Now, let's calculate the mean, median, mode, and range for the given data set of lake altitudes: -12, -9, -14, -39, -49, -18, -43.
1. To calculate the mean, add up all the values:
-12 + (-9) + (-14) + (-39) + (-49) + (-18) + (-43) = -184
Divide the sum by the total number of values:
-184 / 7 = -26.286
So, the mean of the data set is -26.286.
2. Arrange the numbers in ascending order: -49, -43, -39, -18, -14, -12, -9.
The middle number is -18, so the median of the data set is -18.
3. Count the frequency of each number in the data set:
-12: 1
-9: 1
-14: 1
-39: 1
-49: 1
-18: 1
-43: 1
As all numbers appear with equal frequency, there is no mode in this data set.
4. The largest value is -9, and the smallest value is -49. Subtract the smallest value from the largest value:
-9 - (-49) = 40
So, the range of the data set is 40.
To summarize:
Mean: -26.286
Median: -18
Mode: None
Range: 40
Now, regarding your request for help with raising your grades, I would suggest seeking additional resources such as textbooks, online educational platforms, or tutoring services to practice and improve your understanding of mathematical concepts. Khan Academy (www.khanacademy.org) is one such website that offers free educational resources, including tutorials and exercises on various subjects, including math. Additionally, you can reach out to your teacher or classmates for guidance and support.
Mean = ∑x/n
Median = arranged in order of value, middle most score(s)
Mode = most frequent occurring score.
Range = highest score - lowest score
I'll let you do the calculations.