Answer:
−35.713332 ; 0.313332
Step-by-step explanation:
Given that:
Sample size, n1 = 11
Sample mean, x1 = 79
Standard deviation, s1 = 18.25
Sample size, n2 = 18
Sample mean, x2 = 96.70
Standard deviation, s2 = 20.25
df = n1 + n2 - 2 ; 11 + 18 - 2 = 27
Tcritical = T0.01, 27 = 2.473
S = sqrt[(s1²/n1) + (s2²/n2)]
S = sqrt[(18.25^2 / 11) + (20.25^2 / 18)]
S = 7.284
(μ1 - μ2) = (x1 - x2) ± Tcritical * S
(μ1 - μ2) = (79 - 96.70) ± 2.473*7.284
(μ1 - μ2) = - 17.7 ± 18.013332
-17.7 - 18.013332 ; - 17.7 + 18.013332
−35.713332 ; 0.313332
Given
49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively.
To find:
Which of these types of sampling is used: random, stratified, systematic, cluster, convenience?
Explanation:
It is given that,
49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively.
That implies,
Since Stratified random sampling is a method of sampling that involves dividing a population into smaller groups–called strata.
Then, the random sampling used is Stratified Random Sampling.
The easiest way to determine the answer is to just divide $57/$60 = 0.95 or 95%
M = 1 -1 /dx = 0
y = b
y = 1
the line is horizontal ( has one value for y for any given x)
Answer: or or 133.7 (any three are correct)
Step-by-step explanation:
Hey there! I will give the following steps, if you have any questions feel free to ask me in the comments below.
<h2><u>
Problem:</u>
Evaluate 5214 ÷ 39</h2>
<u>Step 1:</u> <em>5214 / 39 = 133 with a remainder of 27.</em>
133 with a remainder of 27
Because 39 is what we will be dividing it by, it will be our denominator.
<u>Step 2:</u> <em>Express as a mixed fraction.</em>
<u>Step 3:</u> <em>Simplify by dividing the denominator/numerator by 3.</em>
or or 133.7
~I hope I helped you! :)~