An Porche claims that it's cars go from 0-60 in 5.9 seconds or less. A sample of 15 cars shows that the average time to go ffrom 0 to 60 is 6.8 seconds, with a sample standard deviation of 2.2 seconds. Is Porche wrong in their claim?

Q: The mean time spent studying for this quiz is 25.3 minutes, with a standard deviation of 3.7…

A:

Q: er has a height of 6 feet 8 inches, or 203 cm. Based on statistics from a data set, his e of 4.10.…

A:

Q: The average length of time, per week, that students at a certain university spend on homework is…

A: Let X be the students thant spend the average length of time (per week) on homework. Also,…

Q: A state administered standardized reading is given to eighth grade students. The scores for all…

A: Mean(μ)=517 Standard deviation(σ)=63

Q: am 1 scores have a mean of 530 and a standard deviation of 110, while exam 2 scores have a mean ores…

A: The z score for exam 1 is:

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A:

Q: A group of 625 high school students has a mean age of 15.8 years with a standard deviation of 1.2…

A:

Q: The standard deviation of the number of words in a sentence by students is 3 words. It is believed…

A:

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A:

Q: ble and highest possibel marks assuming normal distributiion .

A: P(X<5)=Pz<5-589=0

Q: A process window is set so that 95.44% of product passes the process spec. In order to pass, the…

A: question: A process window is set so that 95.44% of product passes the process spec. In order to…

Q: The scores on a standardized test are approximately normal with a mean of 83 and a standard…

A: Let T be minimum score needed to be in top 8%

Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final…

A: It is given that the mean and standard deviation are 83 and 6, respectively.

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: We have given that.   X~N( μ , ?^2 )   μ =0.25 , ? =0.05   Z-score =( x - μ )/?

Q: Happy Hair will hire only those hairdressers in the top 20 percent based on the amount of time it…

A: Given: Mean= μ== 67.5 Standard deviation= σ = 12.5

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: Given data: Mean = 0.22 inches Standard deviation  = .05 inches To find: What proportion of woodlice…

Q: A popular fashion magazine claims that the age of their subscribers is normally distributed with a…

A:

Q: A researcher wants to know if high school students spend a different amount of time watching netflix…

A: Given that  On average, people in general watch Netflix for 71 mins, with a standard deviation of 5…

Q: A World Health Organization study of health in various countries reported that in Canada, systolic…

A:

Q: In 1974, the mean height of a woman in the United States was 63.7 inches, with a standard deviation…

A: given data normal distribution μ = 63.7σ = 2.5P(x>z) = 0.88x = ?

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: i want to estimate the mean number of minutes that a 7 year old watches TV daily. How many kids…

A: Given data,σ=45E=15z-value at 99% confidence is Zc=2.576n=?

Q: Your instructor wishes to estimate the mean amount of time students spend studying math each…

A: Given that  Margin of error =E =2 Population standard deviation =12.7 95% confidence.

Q: 26. Area is 0.0630 ...

A: The area left to Z is 0.0630.

Q: A study was conducted on shoe sizes of students, reported in European sizes. For the men, the mean…

A: Answer:- Given, In European sizes , the mean size = 43.96  standard deviation = 2.24  Also given…

Q: According to the Nielsen Company the mean number of TV sets in a US household in 2013 was 2.24.…

A: Let X is the number of TV sets in US households.

Q: The MF exam has a population mean of 500 and a standard deviation of 200. What are the scores for…

A: Let X=MF exam scores We have given information, The population mean μ=500 And population standard…

Q: A sandwich shop claims to sell sub sandwiches that are 12 inches lona. An employee is a little…

A: We have given information, μ=12 inches n=45 x¯=12 inches s= 18 inches

Q: t is known that the average time required to complete a test exam is 80 minutes and the standard…

A: Given Information: Mean μ=80 min Standard deviation σ=10 min. To find how many minutes should the…

Q: Assume that adults have iq scores that are normally distributed with a mean of 98.2 and a standard…

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Q: You are provided with a mean of 28.18 with a standard deviation of 4.33.  What percent of students…

A:

Q: A grocer finds that the cantaloupes in his store have weights with mean 0.7 kg and standard…

A: Given, Mean weight of cantaloupes is 700 gm. Standard deviation is 53 gm

Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: Given,mean(μ)=0.25standard deviation(σ)=0.05

Q: The use of chemicals is considered to increase the resistance to scratches during a painting…

A:

Q: Suppose the exam average in a class is 55% with a standard deviation of 4. What proportion of…

A: The random variable score follows normal distribution. The population mean is 55.         The…

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.