A normally distributed population has a sample size of 150 which is obtained from apopulation with sample mean 125. It said to have a standard deviation of 50. Whichamong the statements is correct?We are 95% confident that the true population mean lies between 121 and 144.O We are 90% confident that the true population mean lies between 121 and 144.O We are 95% confident that the true population mean lies between 117 and 133.O We are 90% confident that the true population mean lies between 117 and 133.

Answered: Image /qna-images/answer/17dd26ae-75a5-4861-a36b-5d9edda2cf0e.jpg

Answered: A normally distributed population has a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

5. Letitia swam the girls 100m freestyle in 56.5 seconds. Ben swam the boys 100m freestyle in a time of 50.3 seconds. The mean time for the girls 100m at the swim meet was 58.6 seconds with a standard deviation of 2.3 seconds. The mean time for the boys 100m at the swim meet was 52.1 with a standard deviation of 1.8. Who swam the faster relative time? esc 180 1 27 @ 2 #3 13 $ OCT do % M ^
What is the standard deviation in the numbers 0, 1, 2, 3.....9, 10? 2 rabbits, 3 sheep and 1 newt consume 24 lbs of feed per day. 6 rabbits and 1 sheep consume 16 lbs of feed per day. And 2 sheep and 3 newt consume 18 lbs of food a day. How much food would 4 rabbits and 6 sheep need per day?
select which of the three is correct
12
A particular fruit's weights are normally distributed, with a mean of 613 grams and a standard deviation of 19 grams.If you pick 20 fruits at random, then 11% of the time, their mean weight will be greater than how many grams?Give your answer to the nearest gram.
Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 16 days. In what range would you expect to find the middle 95% of most pregnancies? Between and If you were to draw samples of size 59 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places. Question Help: Message instructor Submit Question 824 tv esc 20 888 F1 F2 F3 F4 F5 F6 @ # $ % & 1 2 4 Q W Y T
n a school district, all sixth grade students take the same standardized test. The superintendant of the school district takes a random sample of 21 scores from all of the students who took the test. She sees that the mean score is 128 with a standard deviation of 41.4416. The superintendant wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 25. Is there evidence that the standard deviation of test scores has increased at the α=0.005 level? Assume the population is normally distributed. Step 1 of 5 : State the null and alternative hypotheses. Round to four decimal places when necessary.
Answer number 4 only..
The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 15 days. In what range would you expect to find the middle 50% of most pregnancies? Between and If you were to draw samples of size 58 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places.
Can someone explain the formulas used in these type of questions and where each number belongs in the formula The average size of a farm in Texas is 185 acres. The average size of a farm in Kansas is 220 acres. Assume that the data were obtained from two samples with standard deviations of 40 and 15 acres, respectively, and a sample size of 10 and 12, respectively. Can it be concluded with a=0.05 that the average size of the farms in the two states is different? Assume that the population is normally distributed.
No. 2 only. Give interpretation of your answer...

Recommended textbooks for you

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability (10th Edition)

Probability

ISBN:

9780134753119

Author:

Sheldon Ross

Publisher:

PEARSON

A First Course in Probability

Probability

ISBN:

9780321794772

Author:

Sheldon Ross

Publisher:

PEARSON

SEE MORE TEXTBOOKS