A quality control engineer is interested in the mean length of sheet insulation being cut automatically by machine. The desired mean length of the insulation is 12 feet. It is known that the standard deviation in the cutting length is 0.15 feet. A sample of 70 cut sheets yields a mean length of 12.14 feet. This sample will be used to obtain a 99% confidence interval for the mean length cut by machine. Suppose the engineer had decided to estimate the mean length to within 0.03 with 99% confidence. Then the sample size would be ________. Question 14 options: 1) 176 2) 97 3) 167 4) 68

Q: The population mean is $ 1.587. (Round to three decimal places as needed.) Tax Rate Frequency…

A: We have given that the table Class Frequency 0.00 - 0.49 5 0.50 - 0.99 12 1.00 - 1.49 7…

Q: The water works commission needs to know the mean household usage of water by the residents of a…

A: The maximum desired error for estimating the true average usage of water is 0.14 gallons.The…

Q: Suppose that the pulse rates of adult males vary from a low of 30 bpm to a high of 110 bpm.  Assume…

A: pulse rates of adult males vary from Low =30 bpm High=110 bpm confidence level=95% Margin of…

Q: The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates.…

A:

Q: A physics lab instructor wants to estimate the time required for physic students to complete a…

A: Given that  Standard deviation = 16 Margin of error = 5

Q: The pulse rates of 174randomly selected adult males vary from a low of 39 bpm to a high of 111 bpm.…

A: Given: Low value=39bpmHigh value=111bpmMargin of error(E)=3

Q: The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates.…

A: Frequency distribution of cigarettes tax rate. We have to find out population mean and population…

Q: The frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates.…

A:

Q: The pulse rates of 170 randomly selected adult males vary from a low of 44 bpm to a high of 124 bpm.…

A: Given, the pulse rates vary from a 44 bpm to a high of 124 bpm and the margin of error (E) is 4.

Q: ropolist wishes to estimate the average height of men for a certain race of people.If the population…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: The means of two samples of sizes 50 and 100 respec- tively are 54.1 and 50.3 and the standard…

A:

Q: Suppose we want to determine whether height above sea level has an impact on the boiling temperature…

A: Hypothesis test are used to test whether is significance difference between the samples or between…

Q: Suppose 200 geology students measure the mass of an ore sample. Due to human error and limitations…

A: Mean u = 81g SD o = 3g

Q: heights of adult women in the United States are normally distributed with a mean of 65 inches and a…

A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 10% or…

Q: Find the minimum sample size needed to be ninety seven percent confident that the true mean is…

A: Given,margin of error(E)=2.3standard deviation(σ)=7.3α=1-0.97=0.03α2=0.015Z0.015 =2.1701

Q: For samples of the specified size from the population described, find the mean and standard…

A: The following information has been given: Let X be a random variable represents the annual snowfall.…

Q: The distribution of course grades in a very large class is (approximately) Normal with mean 48 and…

A: Given information: The distribution of course grades in a very large class is Normal with mean 48…

Q: The president of a university wants to use the mean of a ma to estimate the average amount of time…

A: Given information Standard deviation σ = 1.40 Confidence interval = 0.99 Significance level(α) = 1-…

Q: The pulse rates of 179 randomly selected adult males vary from a low of 43 bpm to a high of 103 bpm.…

A: Given : The pulse rates of 179 randomly selected adult males vary from a low of 43 bpm to a high of…

Q: A company that manufactures oil seals found that the population mean is 49.14 mm, the population…

A: Let x be the continuous random variable said to be follows the normal distribution with mean μ and…

Q: (a) Identify Ho and H₂. Choose the correct answer below. Ο Α. Ηο: μ = 40 H₂:μ#40 OC. Ho: μ240.6 Ha:…

A: Given that  Sample size n =30 Sample mean =40.6 Population standard deviation =7.7

Q: The brain volumes (cm3​) of 20 brains have a mean of 1052.4 cm3 and a standard deviation of 122.2…

A: It is given that the mean is 1,052.4 and the standard deviation is 122.2.

Q: A population is known to be normally distributed with standard deviation known to be 6.9. In order…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: The pulse rates of 177 randomly selected adult males vary from a low of 38 bpm to a high of 114…

A: Assume, X be the random variable representing the pulse rates (in bpm). n be the minimum sample…

Q: During the busy season, it is important for the shipping manager at Ship Mundo to be able to…

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: The brain volumes ​(cm3​) of 50 brains vary from a low of 902 cm3 to a high of 1478 cm3. Use the…

A: Given Information:    Maximum=1478Minimum=902

Q: The brain volumes (cm3) of 20 brains have a mean of 1138.1 cm3 and a standard deviation of 120.4…

A: Solution: Given information : n=20 Sample size x=1138.1 cm3   Sample mean s=120.4 cm3  Sample…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…

A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…

Q: In a certain population, body weights are normally distributed with a mean of 152 pounds and a…

A: The number of people surveyed is 1271 and it is obtained below: Let us define the random variable X…

Q: deviation s = 0.1. Is there sufficient evidence in the sample to suggest that the mean nicotine…

A: here given, sample mean  = 1.53 sample standard deviation  = s= 0.1 significance level = 0.01

Q: If the average length measurements for 10,000 pieces of curbstone from a specific laboratory…

A:

Q: The population standard deviation for the heights of dogs, in inches, in a city is 5.7 inches. If we…

A:

Q: the lifetime of washing machines is estimated to be 900 hours, how large a sample must be taken in…

A: The formula to compute sample size is,

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 18 for the population…

A:

Q: We want to estimate the mean number of pages per book in the fiction section of the large school…

A: Given: Sample size, n = 35 Mean = 291.8, SD = 47.6

Q: minimum percentage

A: Given mean=$3.76 standard deviation=0.15 to find the minimum percentage of stores. The Chebyshev's…

Q: A nutritionist wants to estimate the mean amount of cholesterol in a certain variety of chicken…

A: Given Data: Level of significance=0.01  σ=25mg ME=10   To Find: 'n'

Q: An ecologist is studying the impact of local polluted waters on the growth of alligators. The length…

A: Length of adult male alligators follows a normal distribution with µ and standard deviation 2. n…

Q: Suppose the lengths of loaves of rye bread produced at a bakery are normally distributed with a mean…

A: Given information: The mean is 25 and the standard deviation is 4. That is, μ=25σ=4 We need to find…

Q: A nutritionist claims that the mean tuna consumption by a person is 6 pounds per year. A sample of…

A:

Q: An SRS of 25 recent birth records at the local hospital was selected. In the sample, the average…

A:

Q: The researcher took a random sample of 50 residents and found that the mean height of men is 175cm.…

A: A normal distribution is the one which has same mean, median and mode.

Q: A population is known to be normally distributed with standard deviation known to be 6.3.  In order…

A: Hypotheses: H0 : μ=19Ha : μ≠19 The z-distribution can be considered as the distribution of the…