Answer:
The population parameter of this study is the population mean.
Step-by-step explanation:
A population parameter is a numerical measure representing a certain characteristic of the population. For example, population mean, population variance, population proportion, and so on.
The population parameter is computed using all the values of the population.
The population parameter can be estimated using the sample statistic. If the value of the population parameter is not known, then a random sample of large size, say <em>n</em> ≥ 30 can be selected from the population and the statistic value can be computed. This statistic value is considered as the point estimate of the parameter. It is also known as the unbiased estimator of the parameter.
In this case the survey involved sampling of 1500 Americans to estimate the mean dollar amount that Americans spent on health care in the past year.
The sample selected is used to compute the sample mean dollar amount that Americans spent on health care.
So, the population parameter of this study is the population mean.
Answer:
Margin of Error = 5.4088 ;
Confidence interval = (30.1 ; 40.9)
Interval estimate are almost the same
Step-by-step explanation:
Given that :
Population standard deviation, σ = 9.3
Sample size, n = 8
Xbar = 35.5
Confidence level = 90%
The confidence interval:
Xbar ± Margin of error
Margin of Error = Zcritical * σ/sqrt(n)
Zcritical at 90% = 1.645
Margin of Error = 1.645 * 9.3/sqrt(8) = 5.4088
Confidence interval :
Xbar ± Margin of error
35.5 ± 5.4088
Lower boundary = (35.5 - 5.4088) = 30.0912 = 30.1
Upper boundary = (35.5 + 5.4088) = 40.9088 = 40.9
(30.1 ; 40.9)
T distribution =. (30.5 ; 40.5)
Normal distribution = (30.1, 40.9)
Answer:
A series of translations to map at least two angles of the image to two angles of the pre-image.
Step-by-step explanation:
we have 2 figures: △ABC and △A′B′C′
△A′B′C′ is the dialation of △ABC
we have to prove that the figures are similar using AA similarity
AA = (Angle-Angle)
Option D is correct.
Answer:
D. Inno
Step-by-step explanation:
You can estimate cube roots by trying to get the two closest cube roots. Inno used √9 and √16. These two roots are the closest to √10. The cube root of √9 and √16 are 3 and 4 respectively, which means the √10 is between these two numbers, because √10 is between √9 and √16. √9 is the closest to √10, so the cube root of 10 is a number close to 3.
My english can be confusing but I tried :) Hope you understand it.
Answer:
I think the answer is C - (x+2)^2+1
