each week is 1.3. The study found that for a sample of 2549 teenagers the mean number of softdrinks consumed per week is 5.4 . Construct the desired confidence interval round your answers to one decimal place.

Q: After entering the test scores from her Statistics class of 25 students, the instructor calculated…

A: IQR is obtained as the difference between the third and first quartiles.

Q: A research scientist wants to know how many times per hour a certain strand of bacteria reproduces.…

A: It is given that, Sample mean = 7.6. Population standard deviation, sigma is 2.2. The sample size, n…

Q: A research scientist wants to know how many times per hour a certain strand of bacteria reproduces.…

A:

Q: Kathy sets out wanting to find an 80% confidence interval for a population mean; however, she later…

A: The confidence interval formula for a population mean is given by                C.I = x¯±tα/2*sn…

Q: A market researcher, Codie, wants to find a 97% confidence interval for the mean number of dollars…

A:

Q: How do I answer this question? Noise levels at various area urban hospitals were measured in…

A: We have given that,  Sample size (n) = 84 Sample mean (x-bar) = 61.2 Sample standard deviation (s) =…

Q: A research scientist wants to know how many times per hour a certain strand of bacteria reproduces.…

A:

Q: Noise levels at various area urban hospitals were measured in decibels. The mean of the noise levels…

A: Interval estimation is proposed as an estimate of the unknown parameter. Confidence interval is also…

Q: sample of 35 students was taken from the local university. These students spent an average of $180…

A:

Q: A research scholar wants to know how many times per hour a certain strand of virus reproduces. The…

A: It is givne that he mean is 12.9 and the population standard deviation is 2.2.

Q: A marketing researcher wants to find 95% confidence interval for the mean amount that visitors to a…

A: Given Data: The confidence interval is: CI=95% The standard deviation is: σ=11 The mean of the…

Q: Believe it or not, there are some people who don't think that Duke will win the NCAA tournament this…

A: Solution

Q: George got a 75 on a math test. The reliability of the math test was .85 and the standard deviation…

A: Confidence Interval: A confidence interval, refers to the probability that a population parameter…

Q: Here are summary statistics for randomly selected weights of newborn girls: n = 250, x= 32.4 hg, s=…

A: The following information has been provided: The sample size is n=20. The sample mean is x¯=32.5.…

Q: If n 28, = 37, and s = 6.2, construct a confidence interval at a 97% confidence level. Assume the…

A: Solution: The following information is given to us: s=6.2 n =28 A 97% confidence interval is…

Q: A group of university students is exploring the connection between study hours and academic…

A: Let x be the independent variable and represent the study hours of a group of university…

Q: Suppose that you have obtained data by taking a random sample from a population and that you intend…

A: 95% percent confidence interval will give more accurate estimate of µ than 99% confidence interval.…

Q: a. Find the best point estimate of the mean. b. Find the 95% confidence interval of the mean score…

A: According to the answering guidelines, we can answer only three subparts of a question and the rest…

Q: let the variable T stand for a student t-distributed variable. find the following a. in a sample of…

A: The Student t-distribution is used to find the confidence interval.

Q: Jennifer decides that she wants to know the 85 % confidence interval for a population mean despite…

A: Suppose µ is the population mean.

Q: A toy manufacturer wants to know how many new toys children buy each year. A sample of 242 children…

A:

Q: The dean randomly selected 33 students who took the calculus final exam and looked at their scores…

A:

Q: A Gallup survey of 2324 adults (at least 18 years old) in the U.S. found that 417 of them have…

A: The formula of the confidence interval is,

Q: Suppose that you have obtained data by taking a random sample from a population and that you intend…

A: If the level of confidence increases then the standard error of statistic also increases. The margin…

Q: A fashion designer wants to know how many new dresses women by each year. A sample of 502 women was…

A:

Q: You are told that a 95% confidence interval for the population mean is 17.3 to 24.5. If the…

A: we have to identify true or false.

Q: A sociologist is comparing the proportion of teenage boys who receive a text message at least once…

A: The  Conditions for the Confidence interval for the difference in population proportions • Samples…

Q: Sam is the manager of a used clothing store.  He wants to estimate the average amount a customer…

A: From the provided information, The population standard deviation is not known therefore t…

Q: Suppose we wish to calculate a 90% confidence interval for the average amount spent on books by…

A: confidence level=90%Margin of error(E)=2standard deviation()=30

Q: A survey of 32,782 adults in 2004 indicated that 24.6% of adults were current smokers. A similar…

A: Given that Sample proportion in 1995 =0.297 Sample proportion in 2004=0.246 We have to find a...…

Q: A random sample of 64 shoppers showed that they spend an average of $27.31 per visit at the Sunday…

A:

Q: A recent survey of 25 students showed that they spent an average of $18.53 on petrol each week. The…

A: