BRAINLIEST IF CORRECT PLZ HURRY
2 answers:
Answer:
A. 1/4
Step-by-step explanation:
3/4, 1/2
"Used"
How much does Mariah have left?
___________________________
We know that originally, Mariah had 3/4 of a cup of flour, in which she then used 1/2 of that cup in a recipe. There is a dilemma here, the denominators aren't the same and we can't subtract without the same denominator. To solve, we need to get them both to the same denominator, so find what times 2 equals 4. Then multiply that same number by the numerator.
Now that 1/2 has been changed to 2/4, we can subtract.
So she has 3/4, and uses 2/4
Therefore, the answer is A.
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Answer:
We conclude that there has been a significant reduction in the proportion of females.
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 400
p = 50% = 0.5
Alpha, α = 0.05
Number of women, x = 118
First, we design the null and the alternate hypothesis
This is a one-tailed test.
Formula:
Putting the values, we get,
Now, we calculate the critical value.
Now,
Since the calculated z-statistic is less than the critical value, we fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.
Thus, there has been a significant reduction in the proportion of females.