A Computer manufacturer wants to estimate the mean number of defective microchips it produces in a month. From previous study they know that the standard deviation is 8.83. What is the required sample size for the manufacturer to be 95 percent confident, that the average defective microchips are within thier industry average with an allowable error of 0.73 (Round your answer to the next whole number)

Q: The annual per capita consumption of oranges (in pounds) in the United States  can be approximated…

A: It is given that the mean and standard deviation are 19.2 and 4, respectively.

Q: Suppose the population of IQ scores in the town or city where you live is bell-shaped, with a mean…

A: Solution-: Let, X= the population of IQ scores in the town Given: We find mean and standard…

Q: Determine the sample size needed to estimate the mean score on a standardized test within 4 points…

A: Given information Standard deviation σ= 20 Confidence interval = 0.99 Significance level(α) = 1-…

Q: b. If we randomly collect samples of women with 16 in each​ sample, what percentage of those samples…

A: b. The random variable X is defined as the diastolic blood pressure levels in women which follows…

Q: Some college graduates employed full-time work more than 40 hours per week, and some work fewer than…

A:

Q: Suppose that the distribution of touchdowns (in football) is normally distributed with a mean of 250…

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

Q: A professor want to estimate the mean  weight of 1 specific cookie. How many people must he sample…

A: Given, Margin error (E) = 0.6 Standard deviation = 1   The objective is to find the sample.…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 99.2 and a standard…

A: Given info: IQ scores are normally distributed with a mean of μ=99.2 and a standard deviation…

Q: The salaries of a company's employees are normally distributed with mean 15000 and standard…

A:

Q: Suppose that striped dolphin lengths are normally distributed with a population standard deviation…

A: The formula for the minimum sample size is as follows: Here, zα/2 is the critical value at 95%…

Q: The amount of pollutants that are found in waterways near large cities is normally distributed with…

A:

Q: For what lengths will a bolt be​ destroyed?

A: here given, mean = 7cm standard deviation = 0.10 cm

Q: A sample of 30 observations is selected from a normal population where the population standard…

A:

Q: Please help him by finding the standard error of the mean for these data.

A: To find the standard error of the mean.Given that,

Q: Fluorescent lightbulbs have lifetimes that follow a normal distribution, with an average life of…

A: Solution: From the given information, σ=1,612 hours and n=332.

Q: he distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Given data,μ=35σ=12P(11<X<35)=?

Q: samples of n = 100 from

A:

Q: Determine the minimum sample size needed if we want to estimate the mean age of Camden County…

A: Obtain the required sample size: The given confidence level 100*(1–α)% = 95%. The critical value is…

Q: How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working…

A: By using the provided information, We have 95% confidence level Margin of error = 4 Population…

Q: distributed

A:

Q: accounting examination is 26, how large a sample is needed to estimate the true mean score within 6…

A: HERE GIVEN , n = ??? population standard deviation  =  26  confidence level  = 99%

Q: A standardized test, deigned to measure the mathematical skill level of seventh graders is said to…

A: Given information: μ=75, n=25x¯=79, s=10 Null hypothesis: H0 : μ=75 Alternative hypothesis: HA :…

Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…

A: From the provided information,

Q: the number of eggs female house flies lay during a lifetime is normally distributed what a mean of…

A: Given: Mean=800 Standard deviation, σ=100 Sample Size, n=15

Q: For a random sample of  70  overweight men, the mean of the number of pounds that they were…

A: given data  n = 70 x¯ = 28 poundsσ = 3.8 poundsbest point estimate for population mean  = ?

Q: You want to obtain a sample to estimate the average number of hours per week a student from ACM…

A: Here we need to estimate the required sample size with a 99% confidence level. Given SD=9 and ME=2.

Q: The mean BMI score for dieters on the Jenny Craig weight loss program is 38.5, and the standard…

A: The normal distribution: A continuous random variable X is said to follow normal distribution with…

Q: For a random sample of 90 overweight men, the mean number of pounds that they were overweight was…

A:

Q: lab supply company sells pieces of Douglas fir 6 inches long and 2.5 inches square for force…

A: From the given information, Population standard deviation=3500 Margin of Error=700 Confidence level…

Q: Suppose a researcher wants to know if the average diastolic blood pressure in Irish-Americans is…

A: Solution

Q: The director of research and development is testing a new drug. She wants to know if there is…

A: From the provided information, The hypotheses are as follow: H0: µ = 386 minutes Ha: µ < 386…

Q: If research samples 28 college students and wants to compare the sample mean of 8 to the population…

A: From the provided information, Sample size (n) = 28 Sample mean (x̄) = 8 Population mean (µ) = 12…

Q: A mandatory competency test for high school sophomores has a normal distribution with a mean of…

A: Assume a random variable X, defines the scores obtained in competency test for sophomores of high…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: The mass of the apples harvested from a particular orchard follow a nearly normal distribution with…

A:

Q: What is the greatest amount of time that a newborn can sleep and still be in the bottom 75% of…

A: Let , X→N(μ=15.5 , σ=1.6) Our aim is to find the greatest amount of time that a newborn can sleep…

Q: A firm purchases a very large quantity of off-cutts metals and wishes to know the average weight of…

A:

Q: An analyst needs to estimate the mean length of time it takes workers from a department to come back…

A: It is given that the confidence level is 0.90, the population standard deviation is 14 minutes and…

Q: The average number of moves a person make in his/her lifetime is 12 and the standard deviation is…

A: Given,sample size(n)=25mean(μ)=12standard deviation(σ)=3.5

Q: the mean of a random sample of size n= 25 is used to estimate the mean of an entire population that…

A:

Q: If X = average distance in feet for 49 fly balls, then give the distribution of X Round your…

A: Let X be distance to the outfield. It is known- X~N260, 402 sample size considered = 49 So, standard…

Q: The population average for SAT scores is known to be 500 with a standard deviation of 100. This…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: An advertising agency that serves a job radio station wants to estimate the mean amount of time that…

A: Here, σ=45, confidence level=90%, E=5.

Q: A sample of size 50 will be drawn from a population with mean 73 and standard deviation 8. Find the…

A: Given Information: To find out the 19th percentile of the sample mean.

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A: