Suppose you have 67 samples with sample standard deviation 2.5. A 99% confidence interval for the population mean is ?¯±x¯±d. What is d?

Q: what is the sample standard deviation?

A:

Q: Many firms price discriminate across customers by offering differentiated products (e.g., premium…

A: The marginal revenue curve for the high-quality product is (To be deenoted by MRH(qH)): Revenue for…

Q: As indicated in class, the main motivation for using Google Trends data is that the average person…

A: Happiness Variable, as measured by the Google search intensity index for “Parks and…

Q: A population was found to have a mean of µ =75 and standard deviation of σ =2.3. If you took every…

A: Given information- Population mean µ = 75 Population standard deviation, σ = 2.3 Sample size, n = 10

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

A:

Q: Assume you select an SRS of size 94 and give them a test. You calculate the mean test score in your…

A:

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: Find a 95% confidence interval for a mean, µ, where n = 324, x̄ = 2.7, s = .91, and se = .06.

A: Given: n = 324, x̄ = 2.7, s = .91, se = .06.

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: When solving a problem related to one sample and the confidence interval of variance. Which table…

A:

Q: A population has a mean µ = 84 and a standard deviation o = 29. Find the mean and standard deviation…

A: Suppose the variable of interest is x. It is given that; x has mean µx = 84 and the standard…

Q: if E=0.07 and population standard deviation=0.8 then find the sample size for 99% confidence…

A: Margin of error(E)=0.07 population standard deviation(σ)=0.8 confidence level=99%

Q: 8. Standard deviation = 220 %3D Margin of error = 50 Confidence interval = 90% %3D Find the sample…

A:

Q: In a random sample of nine people, the mean driving distance to work was 25 miles the sample…

A:

Q: You collect a sample of 61 observations of animal heights, in mm. The sample mean is 65.19 and the…

A:

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A: Givensample size(n)=64Mean(x)=69.0standard deviation(s)=5.0confidence level=95%

Q: Suppose you have 62 samples with sample standard deviation 4.4. A 99% confidence interval for the…

A: The confidence interval is an interval of estimating the unknown value of the population parameter,…

Q: A sample of the reading scores of 30 fifth graders has mean of 62.the standard deviation of the…

A: Given,   Sample size = 30 Sample mean = 62 Population standard deviation = 15   The objective is to…

Q: you want to obtain a sample to estimate a population mean. based on previous evidence, you believe…

A:

Q: You measure the weights of a simple random sample of 64 people from a population. The sample mean is…

A: Provided information is ; sample size(n) = 64 sample mean(x¯ ) = 55 kg Population standard deviation…

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: You collect a sample of 69 observations of animal heights, in mm. The sample mean is 41.89 and the…

A: Given: x¯=41.89s=4.33n=69 The degrees of freedom is obtained as below: df=n-1=69-1=68 The critical…

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A: Given95% confidence interval N=361 x = 59.1 seconds. z= 4.9 SecondsFind the margin of error?

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

A:

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

A: For the distribution of IQ scores for normal adults at the population level, it is given that:…

Q: READ AND SOLVE THE FOLLOWING: Interval Estimate of Population Mean 1. Suppose that the amount of…

A: We. Have to find confidence interval for given data..

Q: For a sample with M = 90, a score of X = 88 corresponds to z = -1.00. What is the sample standard…

A: Solution-: Given: M=90, X=88, z=-1 We want to find the sample standard deviation?​

Q: Construct the confidence interval for the population mean u. c=0.95 x=15.6 and standard deviation =…

A:

Q: You sample 40 dogs and find a sample mean weight of 60 lbs with a sample standard deviation of 5.…

A: From the provided information, Sample size (n) = 40 Sample mean (x̅) = 60 lbs Sample standard…

Q: You collect a random sample of 50 children and compute X¯X¯, the average height in inches. The…

A: Given that, x¯=50,s=10,n=50 The degree of freedom is, df=n-1   =50-1   =49 Critical value: Using the…

Q: A population has a mean μ = 79 and a standard deviation o=23. Find the mean and standard deviation…

A: Mean(μ)=79standard deviation(σ)=23sample size(n)=245

Q: From a normally distributed population, we took a simple random sample of 700 students with a mean…

A:

Q: Assume that population mean is to be estimated from the sample described. Use the sample results to…

A:

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: You want to create a Z-interval for a population mean, using table C, with the following…

A: From the provided information, Sample size (n) = 25 Mean (x̅) = 34.2 Population standard deviation…

Q: Construct a confidence interval of the population proportion at the given level of confidence. X =…

A:

Q: N=15 scores has ΣX=120.

A: Given, N=15 ∑X=120

Q: Suppose you were to take samples of size 100 from a population with a mean of 12 and a standard…

A: The formula of the standard error of the mean is,

Q: A population of N = 6 scores has ΣX = 42. What is the population mean?

A: Given ,Population of N=6 scoresand Σx =42

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 29, x¯ = 46, and s =…

A: From the provided information, Sample size (n) = 29 Sample mean (x̅) = 46 Sample standard deviation…

Q: What is the ∑X for this sample

A: A sample of size is denoted by n. mean is nothing but the average of given sample observations. Here…

Q: A study of 77 golfers showed that their average score on a particular course was 93. The st.dev. of…

A: 1). Assume, μ  be the population mean golfers score. x be the random variable representing the…

Q: Suppose you survey a random sample from a large population to understand the population proportion.…

A: Obtain the sample size of a no preliminary estimate for p. The formula of sample size is, Obtain…

Q: The scores on a test are normally distributed with a mean of 100 and a standard deviation of 20.…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.