A research scientist wants to know how many times per hour a certain strand of bacteria reproduces. He wants to construct the 95%95% confidence interval with a maximum error of 0.220.22 reproductions per hour. Assuming that the mean is 9.89.8 reproductions and the standard deviation is known to be 1.91.9, what is the minimum sample size required for the estimate? Round your answer up to the next integer.

Q: The population standard deviation for the total snowfalls per year in a city is 13 inches. If we…

A: From the provided information, Population standard deviation (σ) = 13 Confidence level = 95% Margin…

Q: a. Find the 90% confidence interval for μ. b. Find the 95% confidence interval for μ. c. What…

A: Given, x=16.7σ2=16n = 60

Q: Assume that a sample is used to estimate a population mean. Find the margin of error M.E that…

A: From the given information we find the margin of Error.

Q: You are interested in estimating the the mean weight of the local adult population of female…

A: Given :  We are interested in estimating the mean weight of the local adult population of female…

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: Suppose we are interested to construct a confidence interval at 95% confidence level of the mean…

A: The provided information is  α=0.05 The critical value is  zc=1.96  (from standard normal table) The…

Q: Dylan wants to determine a 95% confidence interval for the true proportion of high school students…

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A: Givenstandard deviation(σ)=12Marign of error(E)=7c=99%α=1-0.99=0.01α2=0.005zα2=z0.005=2.5758   (from…

Q: An algebra placement test was used to determine placement in mathematics courses. A sample of…

A: Given that, No. of calculus students gave 50 scores.  Margin of error (E) = 4 Confidence level (C) =…

Q: The store manager took a random sample of 100 customers to determine whether or not the mean waiting…

A: What is the appropriate test to use for this problem? A. One sample z-test  What is the observed…

Q: The population distribution is normally distributed and has a mean of 13.6 and a standard deviation…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: Suppose you wanted to take another sample of dogs to find a 90% confidence interval of young dogs to…

A:

Q: During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard…

A:

Q: How many retired people should be sampled if we want to calculate with 92% confidence the true mean…

A: The provided information are: Confidence level = 92% Margin of error (E) = 0.8 Population standard…

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population…

A: Givenstandard deviaion(σ)=17Margin of error(E)=4confidence level =…

Q: If you have a population standard deviation of 10 and a sample size of 4, what is your standard…

A: Given,population standard deviation(σ)=10sample size(n)=4

Q: For his senior project jerry wants to know the average gpa of students at his high school. He…

A: Here sample size is n= 21 And mean, X bar = 3.07  Standard deviation, s= 0.78 Confidence interval…

Q: You are interested in estimating the the mean weight of the local adult population of female…

A: Given that the population standard deviation is 17 pounds. Confidence level is 96% Margin of error…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

A: We want to find the sample size (n)

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 24 for the population…

A: Sample is the subset of the population. It may be any part of the population. Sample size can be…

Q: Jeremiah wants to estimate the mean age of students at his large university. He'll sample n students…

A: Margin of error =E =1 Population standard deviation =3

Q: A Statistics professor wanted to know how much time in a week his students study his course. He…

A: Given data, 180, 150, 300, 200, 60, 120, 90, 180, 60

Q: when the population standard deviation is 12 points.   b. when the population standard deviation is…

A: It is given that  Sample mean = 68 Sample size = 36 Confidence level = 95%   Note: According to…

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A: The sample size must be equal to 9375.Explanation:Step 1: List the given values as provided in the…

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

A: Given, mean of 5.7-in and a standard deviation of 0.8-in. Z value at 25% = 0.6745

Q: For the population with a mean of 50 and a standard devitation of 8, find the z-score and standard…

A: Let X denotes the random variable that measures the particular characteristic of interest. Let, X1,…

Q: A teacher administers a standardized math .4 test to his class of 75 students. the mean score (out…

A: Here's, mean is 235 and standard deviation is 28. Sample number is 75. We will use one sample…

Q: For men heights are normally distributed with a mean of 69 inches and a standard deviation of 2.8…

A: The random variable X is heights of the men. It is normally distributed. X~N(μ=69,σ=2.8) The sample…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population…

A:

Q: we want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A: Given that, Critical value: Using the z-table, the critical value at 99% confidence level is,

Q: Suppose you take a random sample of n = 80 Douglas College students and ask each student their age.…

A: Solution: Let X be the age of Douglas college students. From the given information, x-bar=22.0375…

Q: you measure the weights of a random sample of twenty-five people. The sample mean is 60 kg. Suppose…

A:

Q: Find the 95% confidence interval for the population mean if the sample is × = 70.4 and the sample…

A: Given that  Sample size n= 24 Sample mean=70.4 Standard deviation =5

Q: Select the correct answer below:   p-value>0.10   0.05< p-value <0.10…

A: The correct option is, 0.05 < P-value < 0.10.Explanation:The provided details are:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 13 for the population…

A: We have given that,  Mean (μ) = 100,  standard deviation (σ) = 13 and confidence level = 95%  and…