Four more than seven times a number is 12.” Write an equation that represents the statement. Then solve.
1 answer:
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Question 1: x+2 = 8 doesn't belong in the given equations.
Question 2: The possible values for y are 0,1 and 2
Step-by-step explanation:
Question: Which one doesn't belong?
We will solve each equation one by one to get which equation doesn't belong with others
So,
Hence,
x+2 = 8 doesn't belong in the given equations.
Question 2:
Given equation is:
It is given that the values of x will be greater than 2 and less than 6 so values of x can be 3,4 and 5
So,
Hence,
The possible values for y are 0,1 and 2
So,
x+2 = 8 doesn't belong in the given equations.
The possible values for y are 0,1 and 2
Keywords: Linear equation, variables
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Answer:
The p-value of the test is 0.1469 > 0.05, which means that there is no reason to believe that the proportion of adults favoring capital punishment today has increased, using a 0.05 level of significance.
Step-by-step explanation:
Suppose that, in the past, 40% of all adults favored capital punishment. Test if the proportion has increased:
At the null hypothesis, we test if the proportion is still of 40%, that is:
At the alternative hypothesis, we test if the proportion has increased, that is, is greater than 40%, so:
The test statistic is:
In which X is the sample mean, is the value tested at the null hypothesis,
is the standard deviation and n is the size of the sample.
0.4 is tested at the null hypothesis:
This means that
Random sample of 15 adults, 8 favor capital punishment.
This means that
Value of the test statistic:
P-value of the test and decision:
The p-value of the test is the probability of finding a sample proportion of 0.5333 or more, which is 1 subtracted by the p-value of z = 1.05.
Looking at the z-table, z = 1.05 has a p-value of 0.8531.
1 - 0.8531 = 0.1469.
The p-value of the test is 0.1469 > 0.05, which means that there is no reason to believe that the proportion of adults favoring capital punishment today has increased, using a 0.05 level of significance.