ensions Help Accessibility124For questions 5 - 6, answer the questions about random variables.5What is the standard deviation forthe random variable X?X 0 1 2 3 4 5P(x) 0.1 0.2 0.1 0.1 0.2 0.34 What is the variance for the randomvariable X?X12345P(x) 0.10.10.60.1 0.16zoomΣBWSign31

First, we find E(X),E(X2) for both the table. For first table:…

Answered: ensions Help Accessibility 1 2 4 For…

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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Similar questions

Question 1c needed
A random sample of 10 subjects have weights with a standard deviation of 13.0649 kg. What is the variance of their weights? Be sure to include the appropriate units with the result. ..... The variance of the sample data is (Round to four decimal places as needed.) MacBook DD 80 000 000 F9 F10 esc F5 F7 F8 F2 F3 F4 F6 F1 & #3 7 8 9
Answers: 2. t = .656, do not reject Ho: there is no evidence that this year's students are performing differently than students in previous years. 3. chi-square = 7.997, Do not reject H0; no evidence that the variance is significantly less than 175. chi-square = 11.250, Do not reject H0; no evidence that the variance is significantly greater than 175. 4. 3.973 to 13.5219
Scores on a certain exam are normally distributed with a mean of 90 and a variance of 25. What is the z-value for a score of 80? -2.0 -0.4 1.0 2.0 0.4
Textbook: Statistics for the Behavioral SciencesGregory J. Privitera Please show your work-Concept and Application Problems (Pg.133) If Sample 1 has a variance of 4 and Sample 2 has variance of 32, can we tell which sample had a larger range? If so, which sample had a greater range?
both
Compute mean, variance, and standard deviation
In a completely randomized design, 12 experimental units were used for the first treatment, 15 for the second treatment, and 20 for the third treatment. Complete the following analysis of variance (to 2 decimals, if necessary). If the answer is zero enter "0". Source of Variation Sum of Squares Degrees of Freedom Mean Square 8 8 Treatments Error 1000 700 2 24 * Ⓡ 650 The p-value is less than 0.01 What is your conclusion? Cannot conclude that the means of the three treatments are equal v 29.17 Total 1800 44 At a 0.05 level of significance, is there a significant difference between the treatments? F 47.65 * p-value 0 ✔ 4
13. STATEMENTS FIRST: CORRELATION CAN BE USED TO DETERMINE THE DEGREE OF RELATIONSHIP BETWEEN VARIABLES SECOND: COEFFICIENT CORRELATION RANGES FROM 0-1A. IF BOTH STATEMENTS ARE TRUEB. IF BOTH STATEMENTS ARE FALSEC. IF THE FIRST IS TRUE AND THE SECOND IS FALSED. IF THE FIRST IS FALSE AND THE SECOND IS TRUE 14. STATEMENTS FIRST; STANDARD DEVIATION IS THE SQUARE ROOT OF THE VARIANCE SECOND: DISPERSION GIVES US THE IDEA OF THE DEGREE OF SCATTERING OF THE DATA IN THE DISTRIBUTION A. IF BOTH STATEMENTS ARE TRUEB. IF BOTH STATEMENTS ARE FALSEC. IF THE FIRST IS TRUE AND THE SECOND IS FALSED. IF THE FIRST IS FALSE AND THE SECOND IS TRUE 15. CHARACTERISTICS OF THE NORMAL CURVEI. CURVE IS ASYMMETRICAL ABOUT MEANII. TAILS OF THE NORMAL CURVE ARE ASYMPTOTIC RELATIVE TO THE HORIZONTAL LINEIII. TOTAL AREA UNDER THE NORMAL CURVE IS EQUAL TO 1IV. NORMAL CURVE ARE SUBDIVIDED INTO THE THREE STANDARD DEVIATION A. I, II, AND III ONLYB. II, III, AND IV ONLYC. I, II, III, AND IVD. I, II, AND IV ONLYE. I,…
Please also find the variance, standard deviation.
QUESTION 2 How do you calculate the sum of squares when only the standard deviation of the sample is given? O take the square root of the standard deviation to calculate the variance and multiply that by the degrees of freedom of the sample O square the standard deviation to calculate the variance and multiply that by the degrees of freedom of the sample O take the square root of the standard deviation to calculate the variance and divide that by the degrees of freedom of the sample O square the standard deviation to calculate the variance and divide that by the degrees of freedom of the sample
Independent simple random samples are taken to conduct a simple comparative test of the means of two populations. The sample sizes are n1 = 20 and n2 = 30. It is assumed that the variances of the populations are equal and that the populations are normally distributed. Which is the appropriate statistical test? a. pooled variance t test b.paired t test c. separate variance t test d. independent samples z test Which of the following must be used? a. z distribution b. t distribution with how many degrees of freedom?

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