Answer:
Option A is correct: A. The first kind of error would be saying that your friend can tell the difference between the two kinds of peanut butter, when she really can't.
Step-by-step explanation:
The null hypothesis: the lady is just guessing and should get about half right.
So the first kind of error (when you reject the null hypothesis when it is actually true): the lady is not just guessing and can tell the difference between the two kinds of peanut butter, whereas in reality, she can't tell the difference and is just guessing randomly.
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N I G G E RStep-by-step explanation:
Fractions, ratios, and percents all interconnect. For example, 50% = 1/2 = 1:2
Answer:
x = 1
Step-by-step explanation:
For this problem, we are simply solving for x, and analyzing the results of the two students. First let's solve for x ourselves:
5 ( x + 3 ) = 20
5 ( x + 3 ) * ( 1 / 5 ) = 20 * ( 1 / 5)
x + 3 = 4
x + 3 + -3 = 4 + -3
x = 1
So we know the solution for this equation is x = 1.
Now let's look at the solutions of the two students. Alex's "divide first" way is correct since it follows the proper order of operations. The order of operations are simply a way in which to simplify problems correctly. Here is the order of things to handle first:
Parenthesis --> Exponents --> Multiplication (Division) --> Addition (Subtraction)
Looking at Morgan's "subtract first" way, we know that he has violated the order of operations. For this specific problem, the distributive property of multiplication is ignored in Morgan's approach, resulting in an incorrect answer.
I hope this helps.
Cheers.