3.A random sample of 100 car owners in Isteanbul shows that Car is used 23500 km per, year with Standand deviation of 4200km. Assume distribution of measuremants are normal. (4) What is the 9% Confidence interval ? (b) Construct a ggyl. predichion interval for the km traveles annually by a car OWner in Istanbal.

Q: 2. A recent survey conducted by the National Telecommunication Commission (NTC) aims to determine…

A: Given x¯=140s=30n=28

Q: In a sample of 226 Americans, the mean annual sugar consumption was 148 pounds with a standard…

A: The sampling distribution of a sample mean follows a normal distribution with the mean converging…

Q: Suppose that the population standard deviation of students score is 20. what is the sample size so…

A:

Q: 2. A study of recent graduates from your school reveals that for a accounting majors the mean salary…

A: Given that  Sample sizes n1=20 , n2=18 Sample mean s x1=30000 , x2=29000 s1=2000 , s2=1500

Q: 2. Mr. V wanted to know the average weight (in kilos) of students in LAO University. He took a…

A: Given, X¯ = 55S = 0.8n = 300confidence level = 0.95          To find, Construct 95% confidence…

Q: A random sample of 42 business students required an average of 43.4 minutes to complete a statistics…

A:

Q: he manager of The Cheesecake Factory in Boston reports that in a sample of eight randomly selected…

A: Given Data: x¯=131.7s=43.2n=8   t-value corresponding to 99% Confidence Interval=3.5

Q: Suppose that the amount of time spend by working student weekly is normally distributed with the…

A: Given,   Sample size = 120 Sample mean = 150 Population standard deviation = 25   Since the…

Q: Suppose the customer ratings of a product follow a normal distribution with the true standard…

A: Confidence interval=x±zα2×std deviationnNow this bold part in the formula, is the margin of error

Q: nutritionist claims that children 13 to 15 years old are consuming less than the recommended iron…

A: Given that :  Sample size (n) = 50 Population mean (u) = 20.5 Sample mean = 12.5 Standard deviation…

Q: 2. The heights of a random sample of 50 Senior High School students showed a mean of 174.5…

A: Given that x̄ =174.5 , S=6.9 , n = 50

Q: Suppose a college determines the average commute time of a random sample of 50 students to be 45…

A:

Q: 2. The heights of a random sample of 50 college students showed a mean of 174.5 centimeters and a…

A: From the provided information, Sample size (n) = 50 Sample mean (x̄) = 174.5 Standard deviation (s)…

Q: Virginia 30083, 32159, 31009, 34384, 38196, 35798, 43330, 26261, 44537, 35679 Send data to…

A: Given data: The population standard deviation of the distribution of the annual income in Texas, ,…

Q: 3) A factory produces batteries that have a lifetime that is approximately normally distributed with…

A: In question, We have given the population standard deviation of 40 hours and sample of 30 batteries…

Q: 9. The comptroller of the YVS University claims that the mean monthly salary of their college…

A: Given, The YVS controller of the YVS university claims that the mean monthly salary of their college…

Q: 4. Suppose a sample of 10 participants had their systolic blood pressure measured. The sample had a…

A: Given, sample size = 10 sample mean =124.6 sample standard deviation =10.4

Q: Suppose that a random sample of eighteen recently sold houses ina certain city has a mean sales…

A:

Q: 2. The mean age of 30 student volunteers in a community pantry is 17.5 year standard deviation of 2…

A: Given: The age of 30 students is normally distributed with the mean of 17.5 with standard deviation…

Q: Suppose a random sample of 100 individuals is taken and that average wage for that sample is $870…

A: It is given that the mean is 870 and the population standard deviation is 300.

Q: The manager of a fast-food restaurant wishes to estimate the mean waiting time customers spend at…

A: It is given that the sample size is n=56. The sample mean waiting time is x¯=6.35. The sample…

Q: The mean amount of the 812 mortgages taken out in a city in the past year must be estimated. Based…

A: Given : Population S.D (σ) = 20000 Confidence Level = 95% Margin of error (E) = 2000

Q: In order to help identify baby growth patterns that are unusual, we need to construct a confidence…

A: As from the above data we have, X¯= 40.6 cm.n( Sample size)=100Standard Deviation(s)=1.6 cm. We are…

Q: A 'Health-Watch' group claims that a cigarette manufacturer's advertisement that its new low- tar…

A: we have given that sample size n=25 ,s=0.39 , xbar=3.19 ,mu=3 degree of freedom =n-1

Q: On this recommendation, a researcher wanted to estimate the mean sedentary time (sitting while…

A: Given:- n=25, x¯=8.76,  σ=1.75 To calculate 95% confidence interval of a normally distributed…

Q: )  Suppose that in a random sample of 50 well water samples, conducted in particular region of Nova…

A: Solution

Q: Suppose that in a random sample of 50 well water samples, conducted in particular region of Nova…

A: The sample mean is 0.013.

Q: Many companies allow managers to accumulate extra working hours above 40 hrs/week (called comp…

A:

Q: A report published by the BZW Luxury Association shows that each American household spent on average…

A: The confidence level is 99%. For, 1-α=0.99α=0.01 Computation of critical value: The critical value…

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: 3. The breaking strength of yarn used in manufacturing drapery material is required to be at least…

A:

Q: Determine the sample size needed to construct a 96% confidence interval to estimate the average…

A: Given  The confidence level     =   96% Margin error                 =   $100 Standard deviation…

Q: A simple random sample of 35 cars and trucks in Vermont have a mean price of $18,702 with a standard…

A: In this question, we have given information35 cars and trucks in Vermont have mean $18702 and…

Q: Is there a difference in the average age that people get married in the US and its close neighbor,…

A: a) Given, Suppose a random sample of 30 Americans had an average age of marriage of 28 years with…

Q: A food snack manufacturer samples 11 bags of pretzels off the assembly line and weighs their…

A:

Q: 4. A sociologist survéys 50 randomly selected citizens in each of two countries to compare the mean…

A: Interval estimation is one of the methods of estimation. If an interval is proposed as an estimate…

Q: A researcher claims that the mean age of women in California at the time of a first marriage is…

A: The claim is that the mean age of women in California at the time of a first marriage is higher than…

Q: Suppose that the owner of a recently opened convenience store in Kuala Lumpur, Malaysia, wants to…

A: Given: n=16x¯=75s=6

Q: Suppose that shopping times for customers at a local mall are normally distributed with known…

A: Given: n=64, x=75 and σ=20.   The value of z at 95% confidence level is 1.96.

Q: The production manager of a large manufacturing company estimates that the mean age of his workers…

A: Given:

Q: construct a confidence interval estimate of the mean head circumference of all babies that are two…

A: Given : Sample Size , n= 120 Sample Mean , x̄ =40.55 population standard deviation…

Q: The treasurer of a municipality claims that the average net worth of families living in this…

A: Given data: Mean = 730,000 Sample size = 50 Sample mean = 860000 Standard deviation = 65000…

Q: A professor wants to estimate how many hours per week her students study, A simple random sample of…

A: Given,   Sample size = 73 Sample mean = 19 Population standard deviation = 2.9

Q: Suppose that Apple Inc wished to estimate the mean talk time for its iPhone before the battery must…

A: Given,   Sample size = 30 Sample mean = 350 Population standard deviation = 90   Since the…

Q: Suppose Apple claims that the average wait time for a customer calling the Apple Care support line…

A:

Q: In a random sample of 28 people, the mean commute time to work was 31.3 minutes and the standard…

A: Given,sample size (n)=28sample mean(x)=31.3standard deviation(s)=7.3α=1-0.90=0.1α2=0.05degrees of…

Q: In a random sample of 27 ​people, the mean commute time to work was 32.5 minutes and the standard…

A: Given data, n=27 x=32.5 s=7.2 α=0.20t-critical value at α=0.20 and df=26 is tc=1.315

Q: A Seattle consumer agency believes that plumber's rates are too high and wants to estimate the mean…

A:

Q: Suppose a random sample of 50 baksetball players showed the average height to be 78 inches. Also…

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.