subject
Mathematics, 20.09.2020 09:01 destineenikole17

1. The National Assessment of Educational Progress (NAEP) gave a test of basic arithmetic and the ability to apply it in everyday life to a sample of 840 men 21 to 25 years of age. Scores range from 0 to 500; for example, someone with a score of 325 can determine the price of a meal from a menu. The mean score for these 840 young men was x = 272. We want to estimate the mean score ? in the population of all young men. Consider the NAEP sample as an SRS from a Normal population with standard deviation ? = 60. If we take many samples, the sample mean x varies from sample to sample according to a Normal distribution with mean equal to the unknown mean score ? in the population. What is the standard deviation of this sampling distribution?
2. The National Assessment of Educational Progress (NAEP) gave a test of basic arithmetic and the ability to apply it in everyday life to a sample of 840 men 21 to 25 years of age. Scores range from 0 to 500; for example, someone with a score of 325 can determine the price of a meal from a menu. The mean score for these 840 young men was x = 272. We want to estimate the mean score ? in the population of all young men. Consider the NAEP sample as an SRS from a Normal population with standard deviation ? = 60.
According to the 95 part of the 68-95-99.7 rule, 95% of all values of barx with a sample size of 840 fall within on either side of the unknown mean ?. What is the missing number?
3. The National Assessment of Educational Progress (NAEP) gave a test of basic arithmetic and the ability to apply it in everyday life to a sample of 840 men 21 to 25 years of age. Scores range from 0 to 500; for example, someone with a score of 325 can determine the price of a meal from a menu. The mean score for these 840 young men was x = 272. We want to estimate the mean score ? in the population of all young men. Consider the NAEP sample as an SRS from a Normal population with standard deviation ? = 60.
What is the 95% confidence interval for the population mean score ? based on this one sample?
A. 266 to 278
B. 152 to 392
C. 270 to 274
D. 268 to 276
4. What is the critical value z* for confidence level C = 95%?
A. z* = 0.838
B. z* = 2.24
C. z* = 2.32
D. z* = 1.96

ansver
Answers: 1

Other questions on the subject: Mathematics

image
Mathematics, 21.06.2019 13:30, babyshazi
Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?
Answers: 3
image
Mathematics, 21.06.2019 19:00, shadow29916
Solve x+3y=6 and 4x-6y=6 by elimination . show work !
Answers: 1
image
Mathematics, 21.06.2019 23:40, asiababbie33
Agrid shows the positions of a subway stop and your house. the subway stop is located at (-5,2) and your house is located at (-9,9). what is the distance, to the nearest unit, between your house and the subway stop?
Answers: 1
image
Mathematics, 22.06.2019 00:30, mlbowman3644
Can someone me find the original price? the discount is 5% and the sale price is $68.40
Answers: 1
You know the right answer?
1. The National Assessment of Educational Progress (NAEP) gave a test of basic arithmetic and the ab...

Questions in other subjects:

Konu
Mathematics, 22.04.2020 17:58
Konu
Mathematics, 22.04.2020 17:58
Konu
History, 22.04.2020 17:59