5. If a population has a standard deviation of 16, what is the minimum number ofsamples that need to be averaged in order to be 95% confident that the averageof the means is within 3 of the true mean?A) 216B) 11C) 110D) 22Za/n =

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Answered: 5. If a population has a standard…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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given the data distribution is aproximately normal with the minimum value of 25 and the maximum value of 256 a) estimate the value of mean and median
The ages of Tony's five cousins are listed below. 14 20 6 18 5 1) Calculate the mean. F= 2) Fill in the table below: Fill in the differences of each data value from the mean, then the squared differences. 0 = C Σ(x-μ)² N H 20 6 18 5 сл АН f 3) Calculate the population standard deviation (o). Σ(x-μ)² = (x-μ)² (Please round your answer to two decimal places)
Consider a population of 800 values that are normally distributed with a mean of 80 and standard deviation of 5. What proportion of values are larger than 74? a) 0.0750 b) 0.1151 c) 0.8849 d) 0.9250
6. A kinesiologist wanted to examine the effects of temperature and humidity on exercise performance. Each participant was asked to walk on a treadmill at a normal pace for 60 minutes, and the kinesiologist recorded the distance walked (miles). She assigned participants to one of 4 conditions that varied in temperature (normal or high) and humidity (normal or high). Mean distance walked by the four groups are shown in the table below. Assume a = .05 and Tukey HSD = 0.39. Normal temperature High temperature Normal humidity M = 3.00 M = 2.80 High humidity M = 2.80 M = 2.00 Complete the following conclusion: The factorial ANOVA revealed significant main effects of temperature [F (1, 24) = 25.00, p<.05] and humidity [F (1, 24) = 19.65, p<.05] and a significant Temperature x Humidity interaction [F (1, 24) = 9.25, p < .05].
3) For population standard deviation = 3 and a population mean = 10, find the z scores for the following x: A) x = 11 B) x = 8 C) x = 19 D) x = 2
Suppose your statistics professor reports test grades as z-scores, and you got a score of 1.90 on an exam. a) Write a sentence explaining what that means. b) Your friend got a z-score of negative 2 . If the grades satisfy the Nearly Normal Condition, about what percent of the class scored lower than your friend?
30. The distribution of weights for 12-month-old baby girls in the US is ap- proximately normal with mean u = 21 pounds and standard deviation o = 2.2 pounds. a) If a 12-month-old girl weighs 23.2 pounds, approximately what weight percentile is she in? b) If a 12-month-old girl is in the 16th percentile in weight, estimate her weight. c) Estimate the weight of a 12-month-old girl who is in the 25th percentile by weight. d) Estimate the weight of a 12-month-old girl who is in the 75th percentile by weight.

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5. If a population has a standard deviation of 16, what is the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within 3 of the true mean? A) 216 B) 11 C) 110 D) 22 Za/ n=