Answer:
When we compare the significance level 
we see that 
so we can reject the null hypothesis at 10% of significance. So the the true mean is difference from 21 at this significance level.
Step-by-step explanation:
Data given and notation
represent the sample mean
represent the population standard deviation
sample size
represent the value that we want to test
represent the significance level for the hypothesis test.
z would represent the statistic (variable of interest)
represent the p value for the test (variable of interest)
State the null and alternative hypotheses.
We need to conduct a hypothesis in order to check if the average age of the evening students is significantly different from 21, the system of hypothesis would be:
Null hypothesis:
Alternative hypothesis:
The statistic is given by:
(1)
Calculate the statistic
We can replace in formula (1) the info given like this:
P-value
Since is a two sided test the p value would be:
Conclusion
When we compare the significance level we see that so we can reject the null hypothesis at 10% of significance. So the the true mean is difference from 21 at this significance level.
This is an inappropriate conclusion because of <u>D. At 10 months</u>, ninety percent of toddlers have not reached the developmental milestones to walk.
<h3>What is an inappropriate conclusion?</h3>
An inappropriate conclusion is one arrived at without a proper research design. An inappropriate conclusion can also be reached when the interpretation of the research result is not based on the findings.
Our conclusion implies that there is a wrong interpretation of the research findings because of the researcher's bias.
Thus, the research conclusion is <u>inappropriate</u> because of Option D.
Learn more about research conclusions at brainly.com/question/24542637
Answer:
there were 50 apples at the store. 12 of them were green, how many of the 50 apples were red?
Step-by-step explanation:
Answer:
To find out how much trim you would need for the window, you would need to calculate the Circumference.
Step-by-step explanation:
<u>Circumference</u> is the length around a circle and is calculated using the following formula.
In which C is the circumference and r is the radius. Since we already know the radius all we have to do is plug it into the equation and solve for C.
<u>Answer:</u> The window has a Circumference of 26.389 feet so you would need that amount of trim to fit the area around the window.
Hope my answer would be a great help for you.
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