A bottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. The water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. A random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon. Construct a 99% confidence interval estimate for the population mean amount of water included in a 1-gallon bottle. On the basis of these results, do you think that the distributor has a right to complain to the water bottling company? Why? Must you assume that the population amount of water per bottle is normally distributed here? Explain. Construct a 95% confidence interval estimate. How does this change your answer to (b)?

Q: A researcher would like to estimate the mean weight of all adult male American alligators in the…

A: Givensample size(n)=80Mean(x)=522standard deviation(σ)=25Confidence level=96%

Q: A random sample of 21 Camden County College students had a mean age of 24 years, with a standard…

A:

Q: In question 2 a 90% confidence interval was computed based on a sample of 250 adults. If the level…

A:

Q: A laboratory tested 58 chicken eggs and found that the mean amount of cholesterol was 109…

A: Given Information: Sample size (n) = 58 Sample mean (x¯) = 109 milligrams Population standard…

Q: A researcher would like to estimate the mean weight of all adult male American alligators in the…

A: Sample size (n) = 105Sample mean (x̅) = 502Standard deviations (σ) = 29Significance level (α) = 1 -…

Q: A bank manager wants to know the mean amount of mortgage paid per month by homeowners in an area. A…

A:

Q: A wildlife study is designed to find the mean weight of salmon caught by an Alaskan fishing company.…

A: Given information Standard deviation σ= 2.10 Confidence interval = 0.95 Significance level(α) = 1-…

Q: A sample of only 8 adult rhinos had an average weight of 2,500 pounds. The standard deviation for…

A:

Q: In a transportation study of 27 large cities it was found that the number of motor vehicles per…

A: Given : Sample size (n) = 27 Sample mean (X¯) = one.34 i.e 1.34 Sample SD (S) = 0.46 Confidence…

Q: random sample of 26 checking accounts at a bank showed an average daily balance of $300 and a…

A: Sample size n = 26

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: Twenty-five automobiles are sampled to measure gas mileage. The results yielded an average of 26.4…

A: Given that n =25,x bar =26.4,s.d =3.4 Construct a 90% confidence interval for the mean miles per…

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: The manager of a paint supply store wants to estimate the actual amount of paint contained in…

A: Solution: Let X be the amount of paint contained in 1-gallon cans purchased from a major-paint…

Q: en analyses of a chemical in soil gave a mean of 20.92 mg/kg and a standard deviation of 0.45 mg/kg.…

A: n=10x¯=20.92S=0.45CI=0.95α=1-0.95=0.05we have to find out the 95 % CI for the given data

Q: na test of the effectiveness of garlic for lowering cholesterol 45 subjects were treated with garlic…

A: From the given information, x¯d=4.6sd=15.3n=45 Confidence level is 90% Significance level is 10%.…

Q: A random sample of 40 Americans yielded a sample mean of 67 gallons of carbonated beverages per…

A: We have given that,  Sample mean (x̄) = 67, Population standard deviation (σ) = 22 and sample size…

Q: A random sample of 800 credit-card holders shows that the mean annual credit-card debt for…

A: Given information:  A random sample of n = 800 credit card holders was taken. The sample mean annual…

Q: The housing market recovered slowly from the crisis of 2008. Realtors in one community have recently…

A: The housing market recovered slowly from the crisis of 2008. Realtors in one community have recently…

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

A: Given:

Q: The average monthly gas bill of a random sample of 43 residents of a city is $172 with a standard…

A: A sample of monthly gas bill of  43 residents in a city is collected.  Sample mean is given by, x =…

Q: The Florida Department of Transportation (FDOT) would like to estimate the average speed of vehicles…

A: For the given data s..d =7,alpha=0.1 M.E =? C.I =?

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: sample of 40 cars and determined the mean city miles per gallon (mpg) was 21.43 mpg with a standard…

A: Given, n=40 x-=21.43 s=5.72 Confidence interval= 90%=0.9 α=0.1

Q: A customer wants to estimate the average delivery time of a pizza from the local pizza parlor. Over…

A: A customer wants to estimate the average delivery time of a pizza from the local pizza parlor. Over…

Q: A company that produces white bread is concerned about the amount of sodium in its bread. The…

A:

Q: Amanda Reaves , a zookeeper, wants to estimate the average weight gain of elephants who are on a new…

A: Solution: From the given information, confidence level is 0.90, σ=5.50 and E=0.95.

Q: The International Air Transport Association surveys business travelers to develop quality ratings…

A: Givensample size(n)=50Mean(x)=3.34standard deviation(s)=2.163confidence interval = 95%

Q: In a test of the effectiveness of garlic for lowering cholesterol, 45 subjects were treated with…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: The head of the quality department of a battery factory needs to estimate the average lifetime of a…

A: Here we have been provided with population standard deviation , σ = 100 hours sample size , n = 64…

Q: The lead levels in a random sample of 23 crows in the region were measured and recorded. The mean…

A:

Q: A quality control manager at a light bulb factory needs to estimate the mean life of a large…

A:

Q: When the null hypothesis is true, the F test statistic is close to When the null hypothesis is…

A: F-statistics are the ratio of two variances that are approximately the same value when the null…

Q: A sample of 20 international students attending an urban U.S. university found that the average…

A: Suppose µ is the population mean monthly expense budget of the international students.

Q: A random sample of 550 credit-card holders shows that the mean annual credit-card debt for…

A: Given information   Sample size (n) = 550 Mean x̅  = $8220 Standard deviation (s) = $1102…

Q: The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain…

A:

Q: The quality control manager at a light bulb factory needs to estimate the mean life of a large…

A: Hey there! As per our policy we can answer only 3 sub-parts at a time. Please make a new request for…

Q: 10 samples of coal from a Northern Appalachian source had an average mercury content of 0.242ppm…

A:

Q: The average monthly gas bill of a random sample of 35 residents of a city is $130 with a standard…

A:

Q: The average monthly gas bill of a random sample of 43 residents of a city is $172 with a standard…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.