Mathematics, 25.01.2021 17:10 zaynmaliky4748
You have two instruments with which to measure the height of a tower. If the true height is 100 meters, measurements with the first instrument vary with mean 100 meters and standard deviation 1.2 meters. Measurements with the second instrument vary with mean 100 meters and standard deviation 0.85 meter. You make one measurement with each instrument. Your results are X1 for the first and X2 for the second, and are independent. a) To combine two measurements, you might average them, Y=(X1+X2)/2. What are the mean and standard deviation of Y? b) It makes sense to give more weight to the less variable measurement because it is more likely to be close to the truth. Statistical Theory says that to make the standard deviation as small as possible you should weight X2 is very close to half the variance of X1, so X2 should get twice the weight of X1. That is, use W=1/3X1 + 2/3X2 What are the mean and standard deviation of W?
Answers: 3
Mathematics, 22.06.2019 02:00
Hassan bought a package of tofu. the temperature of the tofu was 14° celsius when hassan put the package into the freezer. he left the tofu in the freezer until it reached â19° celsius. which expressions explain how to find the change in temperature, in degrees celsius, of the package of tofu? select three that apply.
Answers: 1
Mathematics, 22.06.2019 02:00
The equation y= -16t^2+120 can be used to represent the fridge height above the ground where ti represents time in seconds after she threw the apple how long does it take the apple to hit the ground running your
Answers: 3
Mathematics, 22.06.2019 02:30
Write a ratio and a percent for the shaded area. it is 3x3 and 5x5 grid there is 6 shaded out of a. 6 over 25 , 30% b. 3 over 50 , 6% c.6 over 25 , 24% d. 3 over 10 , 30%
Answers: 1
You have two instruments with which to measure the height of a tower. If the true height is 100 mete...
Mathematics, 21.10.2020 02:01
Computers and Technology, 21.10.2020 02:01
Mathematics, 21.10.2020 02:01
Mathematics, 21.10.2020 02:01
Computers and Technology, 21.10.2020 02:01
Mathematics, 21.10.2020 02:01
Chemistry, 21.10.2020 02:01
History, 21.10.2020 02:01
English, 21.10.2020 02:01