A maker of electric vehicles wants to estimate the mean distance travelled between charges for all the electric cars made at a new plant. The firm selects a sample of 40 cars for this study, and finds that the cars in the sample averaged about 100 miles between charges. From prior studies, the standard deviation for the distance between charges is known to be about 20 miles. Construct a 90% confidence interval estimate of the average distance travelled between charges for all the cars from the new plant.

Q: The average baptismal cost includes 50 guests. A random sample of 32 baptismal during the past year…

A: Given n=32 x¯=53s=10α=0.05

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: Population standard deviation()=0.42Margin of error(E)=0.07

Q: A random sample of 20 patrons from a Wolfville restaurant were chosen. Their tips measured in…

A: From the provided information,

Q: find an 80th percentile of the distribution of the average of 49 flyballs

A: Let M denote the average distance of fly balls for the sample of size n = 49.

Q: A certain type of battery supercharger was found to take a mean of 15.4 minutes to charge a standard…

A: It is been asked to test whether the mean time taken by the updated superchargers to charge standard…

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: The standard deviation: .The margin of error: The confidence level:

Q: Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal…

A: Null hypothesis: H0: µ=153. Alternative hypothesis: H1:µ>153. This is a right tailed test. Here,…

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of 7.2…

A: Given Information: Mean of coffee per ounce,μ0 = 7.2 ounce If  it dispense more money loses. If it…

Q: The time married men with children spend on child care averages 6.1 hours per week (Time, March 12,…

A: The hypotheses can be constructed as: H0: µ = 6.1 H1: µ ≠ 6.1 Sample size (n) = 40 Assume level of…

Q: BIG tO be 9376 ent that its estimate is within 0.07 ounces of u? Carry your intermediate…

A: Given Data : Margin of error, ME = 0.07 population standard deviation, σ =…

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: Given: Standard deviation = 0.35 ounces Margin of error = 0.07 ounces Confidence level = 99% To…

Q: A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it…

A: Given :

Q: Prices of basic commodities are often greatly affected by typhoons. During the aftermath of recent…

A: Claim : the mean price of bangus in these markets is greater than P100 Mathematically , μ >100…

Q: A corporation that maintains a large fleet of company cars for the use of its sales staff is…

A: The data shows the monthly distances in miles driven by a random sample of  12 sales people.

Q: The telecommunications manager at Lowell Call Center is concerned about the average difference in…

A: Given that, The telecommunications manager at Lowell Call Center is concerned about the average…

Q: The monthly expenditure of a family was observed to be normally distributed with mean of Ghc400 and…

A: Given Data : Population Mean,μ = 400 Population Standard Deviation,σ = 20

Q: A tire company finds the lifespan for one brand of its tires is normally distributed with a mean of…

A: Solution: Let X be the lifespan for one brand of its tires is normally distributed with a mean of…

Q: The average length of time it takes to read a book can differ from one generation to another.…

A: Population standard deviation ()= 2.2population mean ()= 17sample mean  = 16.1sample size (n) = 50It…

Q: determine the percent of batteries that can be expected to require repair or replacement under…

A: Let X be the random variable that breakdown times. Given that, X ~ N(μ=50, σ=6) The warranty on a…

Q: Unlike most packaged food products, alcohol beverage container labels are not required to show…

A: Given: Sample size (n) = 57 Sample standard deviation (s) = 86 Hypothesized mean μ=153 Sample mean…

Q: major television manufacturer has determined that its 40-inch LED televisions have a mean service…

A:

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of 7.2…

A: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of 7.2…

Q: repeated measures ANOVA measuring 14 participants across three conditions observed SS Frror =21.50.…

A: A repeated measures ANOVA measuring 14 participants across three conditions observed SS Frror…

Q: Suppose that in the past years the average price per square foot for warehouses in Subic has been…

A: Given: μ=32.28σ=1.29x¯=31.67n=19α=0.05

Q: A random sample of 84 products is selected and sample mean and standart deviation are found to be…

A: We have to find level of confidence.

Q: You have a dataset with a minimum value of 31, median of 40, mean of 42, a first quartile Q1 = 35, a…

A: Given , a first quartile Q1 = 35 ,  a third quartile Q3 = 43 In descriptive statistics, the…

Q: A coin-operated coffee machine made by BIG Corporation was deslgned to discharge a mean of eight…

A:

Q: A certain type of battery supercharger was found to take a mean of 12.3 minutes to charge a standard…

A: Given  μ=12.3, n=21 , x̄=12.9, s=1.3  We want to test the hypothesis.

Q: The historical data of Velvetta Inc., a healthcare products manufacturer, have shown that in a…

A:

Q: coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: According to the given information in this question We need to find the minimum sample size n

Q: The mean length of a work week for the population of workers was reported to be 45 hours. Suppose…

A: Note:Hey, since there multiple questions  posted, we will answer first question for you. If you want…

Q: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of  7.0…

A: We have to fill blank.

Q: The mean age when smokers first start is 13 years old with a population standard deviation of 1.9…

A: State the hypotheses That is, the mean age of smokers equals 13. That is, the mean age of smokers…

Q: anying data table contains chest deceleration measurements (in g, where g is the force of gravity)…

A:

Q: What are the cutoff numbers for the number of chocolate chips in acceptable cookies?

A: Let X be the random variable for the number of chocolate chips in a popular brand. X ~ N(μ=23,σ=1.3)…

Q: coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…

A: Formula for the sample size needed to estimate a population mean is

Q: typical bag of rice weighs 67.5 pounds. A consumer suspects and claims that the mean weight of all…

A: Given : Claim : The mean weight of all bags of rice sold in a local public market is less than the…

Q: The mean age when people got married for the first time in the year 2000 was 26 years old with a…

A: Given, Mean μ = 26 Standard deviation σ = 6 Sample size n = 50 Sample mean x¯ = 27.7 Confidence…

Q: Q3. In a study, 21 seniors (> 65 years old) were assigned to either a Yoga group (to take Yoga…

A:

Q: he amount of fight training times for student pilots at a training location has been roughly…

A: Solution: Given information: n= 20 Sample size  x= 14 Sample mean μ=15 Population mean σ=2.5…

Q: what is the minimum sample size needed in order for BIG to be 99% confident that its estimate is…

A: A coin-operated coffee machine made by BIG Corporation was designed to discharge a mean of eight…