A normal population with unknown variance has a mean of 20. Is one likely to obtain a random sample of size 9 from this population with a mean of 24 and a standard deviation of 4.1? If not, what conclusion would you draw? Explain. On your answer sheet give an explaaation yes no

Q: More time on the Internet: A researcher polled a sample of 1015 adults in the year 2010, asking them…

A: Given information: Group 1: In year 2010, the researcher polled a sample of 1015 adults, asking them…

Q: Can you guys help me on this? Thank you!

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Q: ily Driving The average number of miles a person drives per day is 24. A researcher wishes to see if…

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Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Solution: Let X be the breadth of male head. From the given information, X follows normal…

Q: The mean weight of an adult is 62 kilograms with a variance of 144. If 195 adults are randomly…

A: Population mean=M=62 Population variance=S2=144 Population standard deviation=√S2=√144=12 Sample…

Q: World class runners complete a marathon in an average of 145 minutes with a standard deviation of 14…

A: From the provided information, Mean (µ) = 145 minutes Standard deviation (σ) = 14 minutes Let X be a…

Q: Would it be unusual for a data value to be more extreme than 4.76 standard deviations from the mean?…

A: In a normal distribution, data values that lie more than 4.76 standard deviations from the mean are…

Q: been reported that 73% of federal government employees use e-mail. If a sample of 225 al government…

A: According to the provided information, Sample size (n) = 225 Probability (p) = 0.73

Q: Question Completion Status: 9AMoving to another question will save this response. TOQuestion 6 of…

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Q: Tallest and Shortest Men the tallest living man at the time of this writing is Sultan Kosen, who has…

A: Given that  Tallest = 251 , Shortest = 54  Mean = M = 174 , Standard deviation = SD = 7

Q: Refer to the accompanying table, which describes results from groups of 8 births from 8 different…

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Q: The high temperature, in ∘C, on the first day of winter was recorded in a certain city every year…

A: We have given that,  Sample variance (s^2) = 10 And the data set, 4, 12, 6, 9, 6, 11 We will find…

Q: If you have a research scenario in which you know both the population mean and the population…

A: The objective of the question is to determine whether a one-sample t-test is appropriate when both…

Q: 2. A radar unit is used to measure speeds of cars on a motorway. The speeds are normally distributed…

A: Given μ=90 km/hrσ=10 km/hr Find The probability that a car picked at random is travelling at more…

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: 4. On a certain standardized test, the population mean is 250 with a standard error of the mean of…

A: Given: Population mean, μ=250Standard error of mean, σx¯=25

Q: Suppose that you want to perform a hypothesis test for a population mean. Assume that the population…

A: The population standard deviation is unknown. The sample size is small. The shape of the…

Q: Daily Driving The average number of miles a person drives per day is 24. A researcher wishes to see…

A: Given: n=25x¯=22.5σ=4.1α=0.01μ=24 The test hypothesis are, H0: μ = 24 H1: μ < 24. The hypothesis…

Q: n variable.

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Q: Suppose a random variable has mean 11 and standard deviation 5. What is the value of the random…

A: Suppose the variable of interest is x.

Q: ANOVA was applied to test the results of 3 drug treatments. Each drug was given to twenty…

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Q: If 70 shafts are sampled at random from the batch, what is the probability that the mean diameter of…

A: Let X be the random variable of the diameter of metal shafts produced in a manufacturing…

Q: A student takes a 35-question multiple-choice exam, but did not study and randomly guesses each…

A: Given: A student takes 35 question multiple choice exam, but did not study  nd randomly guesses each…

Q: A company produces steel rods. the length of the steel rods are normally distributed with a mean of…

A: Given Information :  A company produces steel rods. the length of the steel rods are normally…

Q: Can you guys help me on this? Thank you!

A: The 95% confidence interval: 1.2 mi/day to 7.8 mi/day If this is incorrect try to input 1.3 mi/day…

Q: . If there were a total of 500 respondents, how many of them are expected to be more than 72 inches…

A: Given that mean=65.4,s.d=2.9

Q: Please help me with both questions. These are just 2 and you are allowed to answer 3. Please help…

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Q: State Ho and H₂ in words and in symbols. Then determine whether the hypothesis test is left-tailed,…

A: From the provided information, A report claims that lung cancer accounts for at least 39% of all…

Q: Sleep Time A person read that the average number of hours an adult sleeps on Friday night to…

A: Claim : college students do not sleep 6.9 hours on average.

Q: 2. The nicotine content in a single cigarette of a particular brand has a mean of 0.8 mg and a…

A: From the given information ,0.8 mg 0.1 gmsample size, n = 100We have to find the probability that…

Q: A random sample of 100 two-month old babies is obtained, and the mean head circumference is found to…

A: Given,  n=100 x¯=40.6 σ=1.6 μ=40

Q: A college entrance exam company determined that a score of 21 on the matnematics portion of the exam…

A: The t-test statistic is' t=x¯-μsnwhere x¯=sample mean            μ=population mean…

Q: 2. The average credit card debt per household in 2001 was $8637 with a standard deviation of $2400.…

A: population mean = $8637Population standard deviation = 2400Sample size (n)= 225

Q: State Ho and H, in words and in symbols. Then determine whether the hypothesis test is left-tailed,…

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Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: Suppose that you want to perform a hypothesis test for a population mean. Assume that the population…

A: For testing population mean: If sample size is small and the population is normally distributed…

Q: A binomial experiment is given. Decide whether you can use the normal distribution to approximate…

A: Given p=0.56 n=40

Q: The waiting time a customer spends in the airport luggage check-in is a random variable with mean…

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Q: Compute the (sample) variance and standard deviation of the data sample. (Round your answers to two…

A: From the provided information, The data values are as follow: -2, 5, 7, 2, 0, 3

Q: The mean number of words per minute (wpm) typed by a speed typist is 133 with a variance off 144…

A: Given that , = 133, 2 = 144 So , = 12, n = 90 Let  be the mean of sample. = 133  =  /n = 12/90=…