The distribution of heights of a certain breed of terrier dogs has a mean height of 70 cm and standard deviation of 8 cm, whereas the distribution of heights of a certain breed of poodles has a mean height of 30 cm with a standard deviation of 5 cm. Assuming that the sample means can be measured to any degree of accuracy, find the probability that the sample mean for a random sample of heights of 60 terriers exceeds the sample mean for a random sample of 80 poodles by at most 44 cm.

Q: A school administrator wants to see if there is a difference in the number of students per class for…

A: Public School district Sample size, n1=26 Sample mean, x¯1=35 Sample sd, s1=2   Beaverton School…

Q: A standardized test for graduate school admission has a mean score of 141 with a standard deviation…

A: Given Population mean,  μ=141 Population standard deviation, σ=10 Sample size: Smaller organization,…

Q: Assume that the heights of women are normally distributed with a mean of 64.1 inches And a standard…

A: Given: Population mean=μ=64.1. Population standard deviation=σ=2.3. The sample size is n=64.

Q: ily electricty use is i.i.d. with mean of 90 kWh (kilowatt hours) and a standard deviation of 8 kWh.…

A: Here it is given that - Mean (μ) = 90 Standard deviation (σ) = 8 Total number of sample(n) = 100 Let…

Q: Past data reveals that such gestation periods have a mean of 65 days with standard deviation 20days.…

A: Given data: The gestation period of wolves (X) is normally distributed with mean and standard…

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Q: In a herd of longhern cattle the mean horn length is 52cm and h2 is 0.2. Predict the mean horn…

A: Heritability is a measure of additive effects of genes, it tells whether the observation variation…

Q: At one college, GPA's are normally distributed with a mean of 2.6 and a standard deviation of 0,4.…

A: At one college, GPA's are normally distributed with a mean of 2.6 and a standard deviation of 0.4

Q: For a standardized psychology examination, the scores have a mean of 500 and a standard deviation of…

A: The following information is provided. Let X represents the scores of psychology examination.…

Q: Two different species of trees have heights that are approximately normal in distribution.  Tree A…

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: If the population standard deviation is 1.3 and the sample size is 12, then compute the standard…

A: From the provided information,Population standard deviation  = 1.3Sample size (n) = 12

Q: The salaries of professional baseball players are heavily skewed right with a mean of $3.2 million…

A: We have given that  Sample sizes n1= 40 , n2= 35  Sample means xbar1= 3.2 , xbar2=1.9  Standard…

Q: Find the mean adn standard deviation of the indicated sampling distribution of sample means. Then…

A: Mean=96.8 , Standard deviation=0.61

Q: the mean weight of a group of boys is 145 lb, with a standard deviation of 4lb. if the weights are…

A:

Q: obiles? Assume the samples are random and independer dard normal distribution table. dard normal…

A: Let μ1 denote the mean braking distance of automobile A. Let μ2 denote the mean braking distance of…

Q: The annual per capita consumption of red meat in the U.S. is normally distributed with a mean of…

A: From the given information : n = 50 mean = 85.6 standard deviation = 20.5

Q: To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a…

A: Other parts are not provided by you. Still I have tried to provide you detailed solution

Q: The heights of adult men in America are normally distributed, with a mean of 69.2 inches and a…

A: Given that the heights of adult men in America are normally distributed, with a mean of 69.2 inches…

Q: A nurse found that the lengths of babies in a hospital have a normal distribution with mean u and…

A:

Q: A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers…

A: Determine whether the given test is one tailed or two tailed   From the information, given that…

Q: The distances that aeroplanes move before coming to a stop after landing have been observed to be…

A: X= distance aeroplane moveX~N(1 km, 0.06 km)    ; μ=1 km…

Q: The age of professors at a certain university is normally distributed with an average of 45.0 years…

A: Let X be the age of the professors at a certain university. X follows normal distribution that has…

Q: Scores on the SAT test have a mean of 1518 and a standard deviation of 325. If 100 students are…

A: Scores on the SAT test have a mean of 1518 and a standard deviation of 325.

Q: A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers…

A: It is given that the random sample of 54 regular coffee drinkers showed an average of 4.59 cups per…

Q: The mean height of Grade III pupils is 138 cm with a standard deviation of 8 cm. If a sample of 30…

A: We have given that,  X be the random variable from normal distribution with mean = 138, standard…

Q: The weight of male contestants is normally distributed with a mean of 96 kg pounds and a standard…

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Q: Based on data from the National Health Board, weights of men are normally distributed with a mean of…

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Q: A normally distributed random variable has a mean of 449. If a score of 433 lies two standard…

A: Given: μ=449 A score of 433 lies two standard deviations below the mean, it means that, μ-2σ=433

Q: Give a 99.8% confidence interval, for ₁ - 2 given the following information.

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The average speed on a highway is 68 mph with a standard deviation of 4 mph. A vehicle is selected…

A: Given: μ=68, σ=4 The corresponding z-value needed to be computed is: The probability that the speed…

Q: probability that a patient recovers from a rare blood disease is 0.4. If 15 people are known to have…

A: Given problem is binomial distribution Let, X: Patient recovers from a rare blood disease p=Prob. of…

Q: The average length of a rapier, which is a fencing sword, is 92 cm with a standard deviation of 5.9…

A: Solution-: Given: μ=92cm,σ=5.9cm,n=58 We find, P[average length of a rapier is less than 90 cm]=?

Q: A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers…

A: Given, σ1=1.20σ2=1.36n1=50x1=4.35n2=40x2=5.84α=0.01 The hypothesis to be tested here is:…

Q: The weights of people in a certain population are normally distributed with a mean of 159 lb and a…

A: