Answered: a random sample of 68 cows on a…

a random sample of 68 cows on a farm,the average weight is 172.2 lb. with a standard deviation 4.2 lb.Obtain an 81% confidence interval for the mean height of all the cows on the

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

Related questions

Q: The GPA of accounting students in a university is known to be normally distributed. A random sample…

A: A random sample of 26 accounting students has a mean of 2.61 and a standard deviation of 0.13.

Q: A random sample of 40 students taken from a university showed that their mean GPA is 2.94 and the…

A: Obtain the 99% confidence interval for the population mean GPA of students: Denote the population…

Q: The average height of students at a random place from an SRS of 12 students gave a standard…

A: The sample size is 12 and sample standard deviation is 2.5.

Q: A body mass index (BMI) between 20 and 25 indicates a normal weight. In a random survey of 763…

A: Given that We have to find the 95% confidence interval for the difference between the two groups A…

Q: A sample of 22 public high school students spent an average of 6.5 hours studying per week. Assume…

Q: In a random sample of eight people, the mean driving distance to work was 19.3 miles and the…

A: The question is about confidence interval Given : Randomly selected no. of people ( n ) = 8 Sample…

Q: Lindsey selected a random sample of 25 tomatoes at the farmer's market. The 95% confidence interval…

A: When Lindsey selected a random sample of 25 tomatoes at the farmer's market, she was aiming to…

Q: In a random sample of 4 months in a certain city, the average number of burglaries was 31 and the…

Q: The heights of pine trees at a local tree farm are known to follow a normal distribution with a…

A: Given: Sample Sizen=99Sample MeanX=121Standard Deviationσ=7 The z value corresponding to the area…

Q: In a sample of 100 individuals, the average height is 170 cm with a standard deviation of 10 cm.…

A: The 95% confidence interval for the population mean height is calculated as: (170 cm - 1.96 * (10…

Q: The average weight of 36 randomly selected school buses was 4150 pounds with a standard deviation of…

A: Given data,x=4150σ=480n=36z-value at 99% confidence is Zc=2.576

Q: A random sample of 12 chemists from Washington stats shows an average salary of $39,420 with a…

A: The sample mean one (Washington): x¯1=$39,420, sample mean two (New Mexico): x¯2=$30,215, population…

Q: A survey of 38 men found that the standard deviation is 3.3 and the average number of units for…

A: The sample size for men is 38, standard deviation is 3.3, and mean is 12.8. The sample size for…

Q: mi/gallon. A simple random sample of 49 cars of this model is chosen and found to have a mean gas…

A: It is given that Sample mean = 27.5 Population standard deviation = 4 Sample size = 49

Q: A sample of 13 concerts showed their average noise levels were 82 decibels and their standard…

A: Solution: Let X be the noise level From the given information, x-bar=82 decibels, s=7 decibels and…

Q: Find a 99% confidence interval for weights of newborn chimpanzees at the zoo. The sample has 215…

A: Here one sample T- interval is used

Q: The total of individual weights of garbage discarded by 17 households in one week is normally…

Q: A marine biologist is interested in whether the chinook salmon a particular species of salmon in the…

A: The value of sample mean is, x¯=36 The value of margin of error is, ME= 9

Q: At a college, a popular achievement test is used for advanced college placement. Counselors selected…

Q: A researcher has collected the blood samples of 29 individuals and found that the mean hemoglobin…

A: Given information : A researcher has collected the blood samples of 29 individuals and found that…

Q: The health of the bear population in Yellowstone National park is monitored by periodic measurements…

A: Given Mean = 182.9 Standard deviation=121.8 n=54

Q: The health of the bear population in Yellowstone National Part is monitored by periodic measurements…

A: Given that Sample size n = 54 Sample mean M = 182.9 And pioulation SD = 121.8 The critical value of…

Q: A large urgent care center with 4 doctors found that they can see an average of 28 patients per…

A: We have given that Sample size (n) = 41Sample mean (x̅) = 28Standard deviations (s) =…

Q: A survey of college students reported that in a sample of 371 male students, the average number of…

A: Obtain the 98% confidence interval for the difference between men and women in the mean number of…

Q: In a random sample of 100 male students the average height is 68.2 with standard deviation 2.5 .…

A: The summary of statistics is, x¯=68.2,s=2.5,n=100 The degree of freedom is, df=n-1 =100-1 =99…

Q: Find the 95% confidence interval (CI) and margin of error (ME) of the true mean weights of male…

A: As the population standard deviation is unknown, the t-test statistic to be used for estimating the…

Q: Find the lower limit of 95% confidence interval. An SRS of 36 students were taken from high schools…

A: Given Mean=85 Standard deviations=7.15 n=36

Q: A large number of chain saws have been sold. You contact 250 customers and find that it takes an…

A: The following information is provided: Sample Mean \bar XXˉ = 4242 Sample Standard Deviation…

Q: In a sample of 90 large grade A eggs, the mean number of calories was 70 with a standard deviation…

Q: The total of individual weights of garbage discarded by 15 households in one week is normally…

A: The total of individual weights discarded by 15 households is normally distributed with mean 29.7…

Q: A group of students go to a lake that you fished in, and caught 28 adult striped bass fish. The mean…

A: Obtain the 95% confidence interval for the population mean of adult striped bass for that lake. The…

Q: The age of managers in particular industry is normally distributed with mean μ=35. A group of 30…

Q: Peter collects data on the music scores of 200 randomly selected concertos. The sample mean of this…

A: It is given that the mean is 85,252 and the standard deviation is 8,413.

Q: A sample of 22 public high school students spent an average of 6.5 hours studying per week. Assuming…

A: Given: Sample Sizen=22Sample MeanX=6.5Standard Deviationσ=2.3 The z value corresponding to…

Q: A sociologist found that in a sample of 50 retired men, the average number of jobs they had during…

Q: A group of students sampled water from 34 lakes in St. Joseph County. If the mean dissolvedoxygen…

A: Given Information Number of goats = 34 Mean = 3.2 Standard deviation = 0.57 90% confidence interval…

Question

In a random sample of 68 cows on a farm,the average weight is 172.2 lb. with a standard deviation 4.2 lb.Obtain an 81% confidence interval for the mean height of all the cows on the farm.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain storms. The sample mean is 4.6982 and the sample variance is 0.39623. Obtain a 99% confidence interval for the mean pH of the population of storms at that location.
An SRS of 27 students at NYU gave an average height of 5.4 feet and a standard deviation of .1 feet. Find a 90% confidence interval for the mean height of students at NYU.
A local health center noted that in a sample of 400 patients, the average sample age is 30 years with a population standard deviation of 4.4. Calculate the standard deviation of the sample mean of patients in the study. Provide a 95% confidence interval for the average age of all the patients who are referred to the health center by the hospital.
According to a study of 90 truckers, a trucker drives, on average, 560 miles per day. If the standard deviation of the miles driven per day for the population of truckers is 40, find the 95% confidence interval of the mean number of miles driven per day by all truckers.
The gas mileage for a certain model of car is known to have a standard deviation of 6 mi/gallon. A simple random sample of 36 cars of this model is chosen and found to have a mean gas mileage of 28.4 mi/gallon. Construct a 99% confidence interval for the mean gas mileage for this car model.
In a randoms sample of six people, the mean driving distance to work was 19.7 miles and the standard deviation was 6.1 miles. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 90% confidence interval for the population mean u. Interpret the results.
for a cetrain urban area it was found that in a random sampole of 4 months an average of 31 burglaries occured each month. the standard dev. is 4. assume the variable is normallly distributed. find the 90% confidence interval of the true mean number of burgalaries each month.
The wind on any random day in Bryan is normally distributed with a standard deviation of 5 mph. A sample of 16 random days had an average of 22mph. Find a 95% confidence interval to capture the true average wind speed.Use three decimals.
Find the lower limit of 95% confidence interval. An SRS of 36 students were taken from high schools in a particular state. The average test score of the sampled students was 60 with a standard deviation of 13.26. Give the lower limit of the interval approximation.
A study is conducted to find the mean life of a certain manufacturer's car batteries. A random sample of 34 batteries is selected and a mean of 47.5 months with a standard deviation of 7.3 months is found. Find a 95% confidence interval for the mean battery life.
A researcher wishes to find the confidence interval of the population standard deviation for the number of homeless people in a large city. A sample size of 25 had a variance of 214794. Find the lower boundary of the 95% confidence interval.
A sample of 100 postal employees found that the mean time these employees had worked for the postal service was eight years. Assume we know the standard deviation of the population of times postal service employees have spent with the postal service is five years. Find the 98% confidence interval for the mean time the population of postal service employees have spent with the postal service.