Suppose the population standard deviation is 1.91. Compute the correct quantile, the correct population standard deviation for the sample mean, and the correct margin of error for each confidence interval (assuming the sample mean has a normal sampling distribution): (Use 3 decimal places) (a) A 95% confidence interval from a sample of size 10. Quantile: Standard deviation of sample mean: Margin of Error: (b) A 99% confidence interval from a sample of size 29. Quantile: Standard deviation of sample mean: Margin of Error: (c) A 80% confidence interval from a sample of size 3. Quantile: Standard deviation of sample mean: Margin of Error:

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.

1/6

step-by-step explanation:

3+x

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.