The engines made by Ford for speedboats are normally distributed with an average power of 220...
The engines made by Ford for speedboats are normally distributed with an average power of 220 horsepower (HP) and standard deviation of 15 HP. A potential buyer intends to take a sample of 4 engines and will not place an order if the sample mean is less than 215 HP.
What probability distribution should we use for our sampling distributions of the means?
a) Normal Distribution
b) T-distribution
c) Binomial Distribution
d) Poisson Distribution
Homework Answers
a) Normal Distribution
Since, We know population standard deviation .
Data is normally distributed with an average power of 220 horsepower (HP) and standard deviation of 15 HP.
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The engines made by Ford for speedboats are normally distributed
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Problem 18: The engines made by Ford for speedboats are normally distributed with an average power...
Problem 18: The engines made by Ford for speedboats are normally distributed with an average power of 220 horsepower (HP) and standard deviation of 15 HP. A potential buyer intends to take a sample of 4 engines and will not place an order if the sample mean is less than 215 HP. What is the probability that the buyer will not place an order?
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High-power experimental engines are being developed by the Stevens Motor Company for use in its new...
High-power experimental engines are being developed by the Stevens Motor Company for use in its new sports coupe. The engineers have calculated the maximum horsepower for the engine to be 770 HP Sixteen engines are randomly selected for horsepower testing. The sample has an average maximum HP of 750 with a standard deviation of 65 HP Assume the population is normally distributed. Step 1 of 2: Calculate a confidence interval for the average maximum HP for the experimental engine. Use...
High-power experimental engines are being developed by the Stevens Motor Company for use in its new...
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High-power experimental engines are being developed by the Stevens Motor Company for use in its new...
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High-power experimental engines are being developed by the Stevens Motor Company for use in its new...
High-power experimental engines are being developed by the Stevens Motor Company for use in its new sports coupe. The engineers have calculated the maximum horsepower for the engine to be 750HP. Twenty five engines are randomly selected for horsepower testing. The sample has an average maximum HP of 770 with a standard deviation of 75HP. Assume the population is normally distributed. Step 1 of 2 : Calculate a confidence interval for the average maximum HP for the experimental engine. Use...
Ford claims that the 2016 Mustang GT provides 425 HP (horsepower) of power. A random sample...
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If the standard deviation of a normally distributed population is 60 and we take a sample of size 25, then what is the (standard error) standard deviation of the sampling distribution of sample means. * Your answer If the mean of a population is 3 points 250 and we take a sample of size 25, then what is the mean of the sampling distribution of sample means. * Your answer 3 points A certain car model has a mean gas...
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A random sample is drawn from a normally distributed population with mean μ = 24 and standard deviation σ = 1.6. a. Are the sampling distribution of the sample mean with n = 32 and n = 63 normally distributed? Yes, both the sample means will have a normal distribution. No, both the sample means will not have a normal distribution. No, only the sample mean with n = 32 will have a normal distribution. No, only the sample mean...
Please give explanation Help Save & A random sample is drawn from a normally distributed population...
Please give explanation
Help Save & A random sample is drawn from a normally distributed population with mean u = 26 and standard deviation o=2. [You may find it useful to reference the z table.] a. Are the sampling distribution of the sample mean with n= 34 and n=68 normally distributed? O Yes, both the sample means will have a normal distribution. O No, both the sample means will not have a normal distribution. No, only the sample mean with...
Problem 18: The engines made by Ford for speedboats are normally distributed with an average power of 220 horsepower (HP) and standard deviation of 15 HP. A potential buyer intends to take a sample of 4 engines and will not place an order if the sample mean is less than 215 HP. What is the probability that the buyer will not place an order?
High-power experimental engines are being developed by the Stevens Motor Company for use in its new sports coupe. The engineers have calculated the maximum horsepower for the engine to be 770 HP Sixteen engines are randomly selected for horsepower testing. The sample has an average maximum HP of 750 with a standard deviation of 65 HP Assume the population is normally distributed. Step 1 of 2: Calculate a confidence interval for the average maximum HP for the experimental engine. Use...
If the standard deviation of a normally distributed population is 60 and we take a sample of size 25, then what is the (standard error) standard deviation of the sampling distribution of sample means. * Your answer If the mean of a population is 3 points 250 and we take a sample of size 25, then what is the mean of the sampling distribution of sample means. * Your answer 3 points A certain car model has a mean gas...
Please give explanation
Help Save & A random sample is drawn from a normally distributed population with mean u = 26 and standard deviation o=2. [You may find it useful to reference the z table.] a. Are the sampling distribution of the sample mean with n= 34 and n=68 normally distributed? O Yes, both the sample means will have a normal distribution. O No, both the sample means will not have a normal distribution. No, only the sample mean with...
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