QUESTION 10Which of the following statements is true about t distributions?O There are exactly 10 categories of t distributions.O "For any given sample size, there are between two and N-1 appropriate t distributions."O "The larger the sample size, the more at distribution resembles a normal curve."Otdistributions are generally bimodal. QUESTION 9The most common way for an independent sample t-test to be reported in a research article isOt(1:29) <.05O "independent t(15): 30, p: significant"O "t(independent) = 2.9, significant"O"(45)= 3.5, p<.05"

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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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21. MEAN AND STANDARD DEVIA- TION For groups of five drivers, find the mean and standard deviation for the numbers of drivers who say that they text while driving. Number of Drivers Who Say That They Text While Driving 0 1 2 3 4 5 P(x) 0.066 0.238 0.344 0.249 0.090 0.013
Questions A and B please!
10 2
pleaae answer question 2
K Vice claims the mean annual salary for senior level product engineers is $96,000. The annual salaries (in dollars) for a random sample of 16 senior level product engineers are shown in the table to the right. At a=0.01, test the claim that the mean salary is $96,000. Complete parts (a) through (e) below. Assume the population is normally distributed. TTT HTT 0 to - to o to not equi There is enough evidence at the 10% level of signi salary for senior level product engineers is not round.) # 4 (c) Find the standardized test statistic, t. The standardized test statistic is t= - 1.25 (Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. Fail to reject Ho because the standardized test statistic (e) Interpret the decision in the context of the original clain ++ S -4 to 0 S is ▼in the rejection region. is not 100,583 82,475 102,382 91,021 1. Annual Salaries 96,283 93,577 112,619 74,184 76,987 80,983 76,222 104,073 103,929 82,022 85,082…
h 1 ces D by Oni 35. Probability and Statistics Normal Distributions For the following problems, use the information below. A normal distribution has a mean of 85 and a standard deviation of 10. 39) Find the range of values that represent the middle 68% of the distribution. OA) 65-105 OB) 75-95 Save Not Graded 40) Find the range of values that represent the middle 95% of the data. OA) 65-105 OB) 75-95 Save Not Graded 41) Find the range of values that represent the middle 99% of the data. OA) 65-105 OB) 55-115 Save Not Graded
28
A variable of a population has a mean of μ=100 and a standard deviation of σ=42 a. The sampling distribution of the sample mean for samples of size 49 is approximately normally distributed with mean ____ and standard deviation ____ b. For part (a) to be true, what assumption did you make about the distribution of the variable under consideration?A. Normal distribution.B. No assumption was made.C. Uniform distribution. c. Is the statement in part (a) still true if the sample size is 16 instead of 49? Why or why not?A. No, the sampling distribution of the sample mean is never normal for sample size less than 30.B. No. Because the distribution of the variable under consideration is not specified, a sample size of at least 30 is needed for part (a) to be true.C. Yes, the sampling distribution of the sample mean is always normal.
4. The t statistic, the t distribution, and sample size
6) A population has M = 37 and SD =10. If this distribution is transformed into a new distribution with M + 100 and SD = 20, what new values will be obtained for each of the following scores? 47; 52; 57
44. Which of the following is NOT an assumption necessary to perform a 1 sample Z test for means? Group of answer choices The sample is not more than 10% of the population The data is continuous The population standard deviation is known The data follows a normal distribution
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