3. A herd of 1500 steer was fed a special high – protein grain for month. A random sample of 29 was weighed and had gained an average of 6.7 lb. If the standard deviation of weight gain for the entire herd is 7.1 lbs, test the hypothesis that the average weight gain for the month was more than 5.0 lb. 4. A random sample of eight cigarettes of a certain brand has an average nicotine content of 4.20

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 262.2…

A: The mean is 262.2 and the standard deviation is 61.4.

Q: A random sample of 82 eighth grade​ students' scores on a national mathematics assessment test has a…

A: From given data we have : n=82 μ=280,σ=37

Q: an oceanographer claims that the mean dive duration of a north atlantic right whale is 11.5 minutes.…

A: From the given information, Sample size n =34 the Sample mean, x̅=12.2 minutes the Sample standard…

Q: Condé Nast Traveler conducts an annual survey in which readers rate their favorite cruise ship. All…

A:

Q: A company that makes cola drinks states that the mean caffeine content per 12-ounce bottle of cola…

A:

Q: An automobile company is looking for fuel additives that might increase gas mileage. Without…

A: Given, The hypothesis to be tested here is given as follows are: This is a right tailed test.

Q: Find the range of values where Choose a mate the middle 80% of the distribution of sample means will…

A:

Q: In a national survey, middle school students report spending 3.1 hours per week on homework. Mr.…

A: μ=3.1n=24α=0.1σ=1.9x=3.4

Q: The amount of miraculin produced in a hybrid tomato plant had a mean of 105.3 micrograms per gram of…

A:

Q: An organization claims that its product has a life of at least 19 days. if the sample size 36,…

A:

Q: In an automobile repair and service industry, the average number of defective items in all the lots…

A:

Q: A car company says that the mean gas mileage for its luxury sedan is at least 24 miles per gallon…

A: Null hypothesis: µ≥24. Alternative hypothesis: µ<24. This is a left tailed test. Here, the sample…

Q: The percent of fat calories that a person in American consumes each day Is normally distributed with…

A:

Q: Find the mean weight of Mr. Smith's ripe watermelons if only 9% weigh less than 12 lb. (Give your…

A: Given:  Standard deviation (σ) = 2.3 lb Consider x as the required score corresponding to the 9%…

Q: Assume thAt scores on a standardized test are known to follow a bell shaped distribution with a mean…

A: L

Q: o men take less time than women to get out of bed in the morning? A simple random sample of 57 men…

A:

Q: A random sample of 26 psychology graduates scored an average of 458 on the GRE advanced psychology…

A: From the provided information, Sample size (n) = 26 Sample mean (x̅) = 458 Sample standard deviation…

Q: A trucking company determined that the distance traveled per truck per year is normally​…

A:

Q: At my work there is a fancy coffee machine that dispenses 120 ml of coffee, but I believe that the…

A: Given data and calculation for sample standard deviation is shown below Hypothesized mean = 120 ml…

Q: In a random sample of 8 cell​ phones, the mean full retail price was ​$521.70 and the standard…

A: A random sample of 8 cell​ phones, the mean full retail price was ​$521.70 and the standard…

Q: he Iowa Department of Transportation repaired hundreds of bridges in 1993. To check the average cost…

A:

Q: 3. A measure of the right atrial pressure (mm Hg) was made for cardiac patients who were given…

A: Sample sizes n1=21     , n2=21        Sample means X̄1=7.8     , X̄2=6.6         s1 =1.44…

Q: Round your all answers to two decimal places. a. What is the point estimate of the difference…

A: Given : For Sample 1 x̄1 = 85.35 σ1 =4.53 n1 =37 For Sample 2…

Q: Conclude that the mean attendance differs because the p-value = 0.0067 < 0.05. Conclude that the…

A: Given that, Two independent samples of 25 weeks are collected for Tuesday and Wednesday. The mean…

Q: A test is made of Ho: μ = 100 vs. Ha : μ ≠ 100. Given a sample size of 100 and its mean of 97 and…

A:

Q: An educator has developed a program to improve math scores on on the Texas STAAR test. The average…

A:

Q: A chemical engineer claims that the average daily yield of a chemical manufactured in a chemical…

A: The standard error is,

Q: An industry has 2 factories, A and B. A sample of 300 workers is taken, with an average age of 17…

A: Given Data : For Sample 1 x̄1 = 17.0 σ1 = 6.9 n1 = 300 For Sample 2…

Q: Consider all samples of size 16. Find the standard deviation (standard error) of the distribution of…

A: We want to find standard error  Given that  Standard deviation=0.79  Sample size=16

Q: An automobile manufacturer has given its van a 50.750.7 miles/gallon (MPG) rating. An independent…

A:

Q: standard deviation of 14.0751 kg. What is the variance of their weights? Be sure to include

A: Given : A random sample of 10 subjects have weights with a standard deviation of 14.0751 kg

Q: A sample of 60 obese adults was put on a low carbohydrate diet for a year. The average weight loss…

A: Based on the technology, Descriptive Statistics N Mean StDev SE Mean 99% Lower Boundfor μ 60…

Q: For a large metropolitan area, carbon monoxide concentrations in air samples come from a normal…

A: We have to find out answer of given question....

Q: The average weight of new-born kittens is 3.5 ounces. A breeder suspects one of her cats, Stella,…

A:

Q: An automobile manufacturer claims that its car has a 37.9 miles/gallon (MPG) rating. An independent…

A: population mean()=37.9sample size(n)=140Mean()=38.2standard deviation()=1.2significance level()=0.01

Q: A random sample of 10 subjects have weights with a standard deviation of 10.6705 KG. What is the…

A:

Q: Steve believes that his wife's cell phone battery does not last as long as his cell phone battery.…

A:

Q: A person records the speeds of various cars as they drive past their house. After 100 readings, the…

A: Given,mean(μ)=23.84standard deviation(σ)=3.56

Q: In a certain country the heights of adult men are normally distributed with a mean of 71.7 inches…

A: It is given that the mean is 71.7 and the standard deviation is 2.5.

Q: An automobile manufacturer claims that its van has a 45.5 miles/gallon (MPG) rating. An independent…

A: Given data: An automobile manufacturer claims that its van has a μ=45.5 miles/gallon (MPG) rating.…

Q: According to the pharmaceutical companies, in the production of a specific medication for…

A: The objective of this question is to find out how many pills out of 6000 produced would have a mass…