the answer is....
Last one tonight! Thanks for your help Iris!
2 answers:
Answer:
a) 1200
b) +15
Step-by-step explanation:
The given equation is
The cost to get started is the initial cost(y-intercept) which is .
The change in total cost for each book printed is the slope of the line which is
<h2>Hello!</h2>
The answers are:
- $1200
- $25(+)
For the first question, if there is no printed book, the variable x will be 0, so:
The cost to get started, meaning that there is not any printed book, is $1200
For the second question, to determine the change in the total cost for each printed book, let's assume that there is just one book printed, so:
So, the change for each printed book is $15(+) because:
Have a nice day!
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Answer:
The claim that needs to be tested is that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences. This can be expressed as the population proportion of people who prefer mechanical methods of water sanitizing is significantly higher than 0.5.
This is a hypothesis test for a population proportion.
The test will have null and alternative hypothesis:
Test statistic z = 0.972
P-value = 0.166
At a significance level of 0.05, there is not enough evidence to support the claim that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences.
Step-by-step explanation:
We have to construct a hypothesis test for the population proportion. We need to test the claim that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences.
As the survey is done as a yes/no question, the null hypothesis would state that the amount of people who prefer mechanical methods of water sanitizing is not significantly different from the proportion of people who have no sanitizing methods preferences. That can be expressed as the population proportion equals 0.5, so both proportions are equal.
The alternative hypothesis would state that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences. This could be expressed as the population proportion significantly bigger than 0.5.
Then, the null and alternative hypothesis are written:
The significance level is assumed to be 0.05.
The sample has a size n=209.
The sample proportion is p=0.536.
The standard error of the proportion is:
Then, we can calculate the z-statistic as:
This test is a right-tailed test, so the P-value for this test is calculated as:
As the P-value (0.166) is greater than the significance level (0.05), the effect is not significant.
The null hypothesis failed to be rejected.
There is not enough evidence to support the claim that the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences.