As part of a water quality survey, you test the water hardness in several randomly selected streams, The results are shown below. Construct a confidence interval for the population variance o and the population standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribution. n= 16 s = 13 grains per gallon What is the confidence interval for the population standard deviation o? UD (Round to one decimal place as needed.) Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to one decimal places as needed.) O A. With 5% confidence, you can say that the population standard deviation is between and O B. With 95% confidence, you can say that the population standard deviation is less than grains per gallon. grains per gallon. O C. With 95% confidence, you can say that the population standard deviation is between grains per gallon. and O D. With 5% confidence, you can say that the population standard deviation is greater than grains per gallon.
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A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
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Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
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Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
![As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below, Construct a confidence interval for the population variance o and the population
standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribution.
n= 16
s= 13 grains per gallon
What is the confidence interval for the population standard deviation o?
(Round to one decimal place as needed.)
Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.
(Round to one decimal places as needed.)
O A. With 5% confidence, you can say that the population standard deviation is between
grains per gallon.
and
O B. With 95% confidence, you can say that the population standard deviation is less than
grains
per gallon.
O D. With 5% confidence, you can say that the population standard deviation is greater than
O C. With 95% confidence, you can say that the population standard deviation is between and
grains per gallon.
grains
per gallon.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdac0d91e-d556-4f35-997e-fb34efe7a339%2Fadaf29b0-f693-45d2-aa91-de64c2246378%2Fnfqavaw_processed.jpeg&w=3840&q=75)
![As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below, Construct a confidence interval for the population variance o? and the population
standard deviation o. Use a 95% level of confidence. Assume that the population has a normal distribution.
n= 16
s= 13 grains per gallon
What is the confidence interval for the population variance o2?
(Round to one decimal place as needed.)
Interpret the results. Select the correct choice below and fill in the answer box(es) to complete your choice.
(Round to one decimal places as needed.)
O B. With 5% confidence, it can be said that the population variance is greater than
O A. With 95% confidence, it can be said that the population variance is less than
and
O D. With 5% confidence, it can be said that the population variance is between
and
O C. With 95% confidence, it can be said that the population variance is between
What is the confidence interval for the population standard deviation o?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdac0d91e-d556-4f35-997e-fb34efe7a339%2Fadaf29b0-f693-45d2-aa91-de64c2246378%2Fc5sa6y1_processed.jpeg&w=3840&q=75)
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