Using the z-distribution, it is found that the 95% confidence interval to estimate the mean SAT math score in this state for this year is (472, 488).
We have the <u>standard deviation for the population</u>, which is why the z-distribution is used to solve this question.
- The sample mean is .
- The population standard deviation is .
- The sample size is .
The interval is given by:
We have to find the critical value, which is z with a p-value of , in which is the confidence level.
In this problem, , thus, z with a p-value of , which means that it is z = 1.96.
Then:
The 95% confidence interval to estimate the mean SAT math score in this state for this year is (472, 488).
A similar problem is given at brainly.com/question/22596713
Answer:
80 students
Step-by-step explanation:
Given that,
Total number of students in 5th grade = 120
Two-thirds of the 5th graders are wearing sneakers today.
Let there are x graders wearing sneakers today.
Hence, 80 students are wearing sneakers today.
To go from kilometers to miles we have to divide 60 by 1.6 to get 37.5 miles. Now we need to divide 37.5 by 70 to get approximately 0.5. The answer is B. 0.5
M <ECA = 180 - <span>m ∠ACB = 180 - 65 = 115
answer
</span><span>
m ∠ECA = 115</span>
Answer:
Volume=480x
Step-by-step explanation:
x=measurement in inches, centimeters, meters, etc.