A researcher computes a 90% confidence interval for the mean weight (in ounces) of widgets produced in a computer factory. The interval is (7.2, 8.9). Which of these is a correct interpretation of this interval? (A) There's a 90% chance the population value is between 7.2 and 8.9 oz. (B) Ninety percent of all sample means are equivalent to the true mean weight of all the widgets. (C) If you drew many samples of size n and constructed a confidence interval from each sample, 90% of the intervals would contain the true population value. (D) Out of all the widgets produced in the factory, 90% weigh between 7.2 and 8.9 oz

(A) There's a 90% chance the population value is between 7.2 and 8.9 oz.

Step-by-step explanation:

The confidence interval is the probability that the population value would fall within a range of values for a number of times. The confidence interval are calculated by adding and subtracting the margin of error to/from the mean.

A 90% confidence interval of (7.2, 8.9) means that their is a 90% confidence or chance that the population value is between 7.2 and 8.9 oz.

c: y > - 1/6x + 1

step-by-step explanation:

dashed line - meaning this < or > also not equal

solid line - meaning this < or > also equal

your answer is c because y > means up & it's shaded up, but y < means down

hope this ! : )

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.