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Slav-nsk [51]
3 years ago
13

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

tion is approximately ?=62.3?=62.3. You would like to be 95% confident that your estimate is within 2 of the true population mean. How large of a sample size is required?
Use a z* value accurate to TWO places for this problem. (Not z = 2)
n =________________.
Mathematics
1 answer:
Vinvika [58]3 years ago
4 0

Answer:

n= 3,727.590 = 3,728

Step-by-step explanation:

Given that,

Population standard deviation, σ=62.3

Margin of error, ME=2

95% confidence interval

The margin of error is defined as:  ME= Z0.05/2 × σ/√n

2 = 1.96×62.3/√n

√n = <u>1.96×62.3</u>

            2

√n = 61.054

n = 3,727.590 = 3,728

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It might be B.160 if you multiply 16 times 2 you get 32 the n multiply 32 by 5
3 0
3 years ago
A tank has the shape of a rectangular prism with the dimensions shown. How much glass was used to make the tank. 34 in² 65 in² 1
Lady bird [3.3K]

Answer: Find the surface area with the formula SA = 2wl + 2lh + 2hw

Step-by-step explanation:

<u><em> Since you did not provide the figure, I will give you a general explanation about how to solve this exercise.</em></u>

By definition, the surface area of a rectangular prism can be calculated with the formula shown below:

SA = 2wl + 2lh + 2hw

Where "SA" is the surface area of the rectangular prism, "w" is the width of the rectangular prism, "l" is the length and "h" is the height of the rectangular prism.

Therefore, if you know the length, the width and the height of the rectangular prism, you can follow these steps in order to calculate how much glass was used to make the tank. The procedure is:

Step 1: You must substitute the values of "l", "w" and "h" into the formula.

Step 2: Finally, you must evaluate in order to get the surface area of the rectangular prism (This value is the amount of square inches that was used to make the tank).

8 0
3 years ago
PLEASE HELP I GIVE BRAINLIST! THIS IS ALMOST DUE!
labwork [276]

Answer:

"B A C" 16x20=320

Step-by-step explanation:

8 0
3 years ago
CAN SOMEONE HELP???????????
guapka [62]

Answer:

g(-1) = -1

g(-0.25) = 0

g(2) = 2

Step-by-step explanation:

6 0
3 years ago
Marely walked around 2 rectangular parks. One measures 54 feet by 38 feet and the other measures 32 feet by 22 feet.
galben [10]

Answer:

130 feet or 39.6m

Step-by-step explanation:

for Marely's first rectangular park, L=54 and B= 38

Total perimeter of distance walked in first rectangular park is 2(L+B), which is 2(54+38) =184 feet

For Marely's second rectangular park, L= 32 and B=22

Total perimeter of second distance 2(L+B), which is 2(32+22) = 108 feet

Total perimeter covered by Marely = (P1+P2) 184+108 = 292 feet

Marely's brother = 2(L+B)

2(48+33) = 162 feet

Hence, difference is 292-162 = 130 feet or 39.6m

3 0
3 years ago
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