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- In the experiment, you repeated measurements 13 times for a resistor. After data processing, you determined that the standard deviation of the measurements is 4.3 N. What is the standard error of the mean in unit of N?population is normally distributed with a mean of 115 and a standard deviation of 15. Answer the following two questions. Blank 1: What is the mean of the sampling distribution for this population? Blank 2: If a sample of 36 participants are selected from this population, what is the standard error of measurement? Please type answerRachael got a 660 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have mean μ = 600 and standard deviation σ = 30, what is her standardized score?
- A randomly selected sample of n = 95 individuals over 65 years old takes a test of memorization skills. The sample mean is x = 53, and the standard deviation is s = 6.8. Give the numerical value of the standard error of the mean, s.e. (Round your answer to two decimal places.)This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used. 0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean. 0.5 point for finding the correct probability. All work must be shown in order to receive any credit. Please upload your completed assignment here. The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.Based on data from a college, scores on a certain test are normally distributed with a mean of 1531 and a standard deviation of 324. Complete parts below. c. Find the percentage of scores between 1369 and 1661.
- for a population with a standard deviation of 4.2 and mean of 32.5, draw a bell shaped curve, marking location of the mean and the numbers that correspond with all the standard deviations Type your answer here:A randomly selected sample of n = 55 individuals over 65 years old takes a test of memorization skills. The sample mean is x = 53, and the standard deviation is s = 6.9. Give the numerical value of the standard error of the mean, s.e. (Round your answer to two decimal places.) s.e.(x) =You want to know if a treated sample mean, M, is significantly different from some hypothesized mean, however, you do not have access to the popuation standard deviation, so you estimate it by computing the standard deviation of the sample. Which stats test do you run? a. z test for determining position of a score, x, in a population. b. one-sample t test. c. independent-samples t test. d. z test for determining the position of a mean, M, in a sampling distribution.
- We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately �=76.4. We would like to be 95% confident that the estimate is within 0.5 of the true population mean. How large of a sample size is required?�=How much money on average does a fan of professional football spend on food at a single football game? This question was posed to 71 randomly selected football fans. The sample results provided a sample mean and standard deviation of 15.15 euro and 2.6 euro, respectively. Estimate the value of the population mean, μ, the mean amount of money football fans spend on food at a single game. Fill in the blanks in the following: • An estimate of the population mean is 15.15 • The standard error is • The distribution is normal (examples: normal/t12/chisquare4/F5,6). For a 90% confidence interval the distributional cut-off is It is quite likely that the true mean amount of money football fans spend on food at a single game is between with 90% confidence. and2 If n=100, X = -20 , EX =220. Find standard deviation Select one: a. 2.1818 b. 2.2626 C. 1.477 d. 1.504