A tetrahedral (four-sided) die has written on it the numbers 1, 2, 3 and 4. The die is rolledmany times and the scores are noted. The table below shows the resulting frequencydistribution.Score1234Frequency18y22The die was rolled a total of 100 times.(a)Write down an equation, in terms of x and y, for the total number of times the diewas rolled.The mean score is 2.71.(b)Using the mean score, write down a second equation in terms of x and y.(c) Find the value of x and of y.

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Answered: A tetrahedral (four-sided) die has…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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36) Find the area of the shaded region. The graph depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15z
QUESTION 2 Elaine rolls a 20-sided die a total of 7 times. Her results are given below: Need undogh answe? watA Cines 20 5 18 8 7 6 20 a. What is the range? Explain your answer. range = explain: b. Determine the mean of Elaine's die rolls by using the formula for mean. Make sure to explain your answer or show your work. rea X = explain: c. Complete the table below. data value deviation deviation squared 20 8 64 20 8 64 18 6. 36 8 4 16 7 -5 25 6. -6 36 -7 49 Total: 290 d. Using your work from c., determine the sample standard deviation to the nearest hundredth. Explain your answer. S = 48.33 explain:
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... x 0.8 A graph with a bell-shaped curve, divided into 2 regions by a line from top to bottom, on the left side. The region right of the line is shaded and labeled 0.8. The x-axis below the line is labeled "x". The indicated IQ score, x, is nothing. (Round to one decimal place as needed.)
Researchers fed mice a specific amount of Aldrin, a poisonous pesticide, and studied their nervous systems to find out why Aldrin causes convulsions. The absolute refractory period, time required for nerves to recover after a stimulus, was measured and varies Normally. The measurements, in milliseconds, for five mice were 2.3, 2.3, 2.4, 2.5, and 2.6. Part A: Find the mean refractory period and the standard error of the mean. Part B: Suppose the mean absolute refractory period for unpoisoned mice is known to be 2.32 milliseconds. Aldrin poisoning should slow nerve recovery and therefore increase this period. Do the data give good evidence at a significance level of 0.05 to support this theory? What can you conclude from a hypothesis test? Justify your response with statistical reasoning.
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... x 0.7 A graph with a bell-shaped curve, divided into 2 regions by a line from top to bottom, on the right side. The region left of the line is shaded and labeled 0.7. The x-axis below the line is labeled "x". Question content area bottom Part 1 The indicated IQ score, x, is enter your response here. (Round to one decimal place as needed.)
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Earthquake magnitude 5.0-5.9 Frequency The table shows the magnitudes of the earthquakes that have occurred in the past 10 years. Use the frequency distribution to construct a histogram. Does the histogram appear to be skewed? If so, identify the type of skewness. 12 14 6.0-6.9 7.0-7.9 8.0-8.9 8. 4 9.0-9.9 Construct the histogram. Choose the correct graph below. O B. 15- 15- 10- 10- 5- 5- 10 6. Earthquake Magnitude 0. 5. 7 8 Earthquake magnitude 10 O D. OC. 15- 15- 10- 5- 10- 6. 10 C 8. Earthquake magnitude 5. 7. 9. 10 C Earthquake Magnitude Click to select your answer. a 0 門 17 Type here to search hp ho tg 144 f8 f6 f5 f3 米 f4 IOI ?. esc Frequency %24 6 Aouanbel
College students recorded the self-reported weights (in pounds) of some community college male baseball players and male soccer players. Write a brief comparison of the distributions of weights for the two groups. Include appropriate graphics. Click the icon to view the weights of male baseball and soccer players. Make dotplots using the same axis with one set of data above the other. Choose the correct graph below. Click here to view dotplots C Click here to view dotplots D. Click here to view dofplots B. O Click here to view dotplats A Compare the shape, center, and variation (and mention outliers if there were any). Baseball players' weights are to weigh with The soccer players' weights are with The baseball players tend soccer players. The baseball players have a distribution with variability than the soccer players' distribution. Data table Baseball Players' Weights: 190,192,183,183,190,187,187,187,192,192,184,184,184,192,187,228,183,190,180,184,183,187,184,184,205,187,230 Soccer…
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Arm circumferences of 122 outpatients at a clinic in Santa Cruz are measured in centimeters. The resulting data are ... O Numerical and continuous. O Numerical and discrete. O Categorical and ordinal. O Categorical and nominal.
Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... 85 110 A graph with a bell-shaped curve, divided into 3 regions by 2 lines from top to bottom, one on the left side and one on the right side. The region between the lines is shaded. Moving from left to right, the x-axis below the first line is labeled 85. The x-axis below the second line is labeled 110. Question content area bottom Part 1 The area of the shaded region is enter your response here. (Round to four decimal places as needed.)
The weights, in pounds, of packages on a delivery truck are shown in the stem-and-leaf plot. Find the mean, the median, and the mode of the data, if possible. If any measure cannot be found or does not represent the center of the data, explain why. ... 0 36 1 0347 2 2333669 3 045556789 4 01346 5 5 Key: 0=30 Find the mean. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The mean is 29.4 (Round to one decimal place as needed.) OB. The mean cannot be calculated because the sample size is too small. OC. The mean cannot be calculated because the data are at the nominal level of measurement. OD. The mean cannot be calculated because there is an even number of data entries. Does the mean represent the center of the data? Choose the correct answer below. OA. The mean represents the center of the data set. OB. The mean does not represent the center because it is the greatest data entry. O C. The mean does not represent the center because it…

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