Mass = volume × density;
mass = 2.5g/mL x 15mL;
mass = 37.5g;
Answer:
Step-by-step explanation:
The confidence interval for population mean is given by :-
Given : Sample size :
Sample mean :
Standard deviation :
Significance level :
Critical value :
Now, the 99% confidence interval for the mean percent body fat in all men aged 20 to 29 will be :-
The modal class is 70 - 80 and the mean speed is 66.4
<h3>How to determine the modal class?</h3>
The table of values is given as:
Speed Frequency
40 - 50 10
50 - 60 16
60 - 70 19
70 - 80 23
80 - 90 12
The modal class is the class with the highest frequency
The class 70 - 80 has the highest frequency of 23
Hence, the modal class is 70 - 80
<h3>How to determine the mean?</h3>
Rewrite the frequency table to include the class midpoints
x f
45 10
55 16
65 19
75 23
85 12
The estimate of the mean speed is then calculated as:
So, we have:
Evaluate
Hence, the mean speed is 66.4
Read more about mean and mode at:
brainly.com/question/14532771
#SPJ1
Answer:
All integers are whole numbers
Step-by-step explanation:
Integers include all whole numbers and their negative counterpart (basically numbers that are NOT fractions or decimals).
Whole numbers don't include negative numbers (as negative numbers are rational numbers).
Answer: 41. A) 0 42. B) 1/12 43. B) 16
<u>Step-by-step explanation:</u>
The pattern is: multiply the bottom row and subtract the top number.
Sample: 3 x 2 - 5 = 1
5 x 3 - 6 = 9
2 x 1 - 1 = 1
41) 7 x 13 - x = 91
91 - x = 91
x = 0
42) 1/2 x 1/2 - 1/6 = x
1/4 - 1/6 = x
3/12 - 2/12 = x
1/12 = x
Check the fractions. I had to guess what the denominators are because the image is blurry.
43) 8 x 3 - 8 - x
24 - 8 = x
16 = 0