Calculus and Above

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Why did you say not to choose t distribution? Which
http://statulator.com/SampleSize/ss1M.htmlWhy did you say not to choose t distribution? Which distribution gives right values? Which one gives more correct value over another? Please explain in detail… read more
R.R. Jha
Bachelor's Degree
Bachelor's Degree
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My question is assume that a population is normally
my question is assume that a population is normally distribute with a mean of 100 and a standard deviation of 15 would it be unusual for the mean of a sample of 3 to 115 or more why why not … read more
GLENN GILONGOS
Master of Mathematics
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Thanks. This is the question that i need help with: Why
Hi, Thanks. This is the question that i need help with: Why can't we just master a single statistical test—such as the t-test—and use it in situations calling for mean equality decisions? … read more
GLENN GILONGOS
Master of Mathematics
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A survey claims that 9 out of 10 doctors recommende aspirin
A survey claims that 9 out of 10 doctors recommende aspirin for thir patients with headaches. To test this claim against the alternative that the actual proportion of doctors who recommended aspirin i… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Recently, the bowling scores of a certain bowler were normally
Recently, the bowling scores of a certain bowler were normally distributed with mean 201 and standard deviation 23.The best score is 299. Find the percentile that corresponds to this score, and explai… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
The following are the overall miles per gallon (MPG) of 2012
The following are the overall miles per gallon (MPG) of 2012 family sedans: 38 24 26 21 25 22 24 34 23 20 37 22 20 33 22 21 a. Construct a 95& confidence interval estimate for the population mean MPG … read more
Ashok Kumar
Master's Degree
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1. What is the primary reason for applying a finite population
1. What is the primary reason for applying a finite population correction coefficient? A. If you don't apply the correction coefficient, your confidence intervals will be too narrow, and thus overconf… read more
Stevewh
Teacher
Bachelor's Degree
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1. H0 is p = 0.45 and H1 is p ≠ 0.45. What type of test will
1. H0 is p = 0.45 and H1 is p ≠ 0.45. What type of test will be performed? A. One-tail testing of a mean B. Two-tail testing of a proportion C. One-tail testing of a proportion D. Two-tail testing of … read more
Ryan
Bachelor's Degree
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The following information is for the below Questions
The following information is for the below Questions The recommended daily allowance (RDA) of cobalamine (Vitamin B12) for growing teens is 2.4 µg (micrograms). It is generally believed that growing t… read more
JACUSTOMER-yrynbdjl-
Master's Degree
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Test a research hypothesis that data (Sample) that was drawn
Test a research hypothesis that data (Sample) that was drawn from this same area (Population) is different in its lead contamination, and is therefore not representative. Use a Z-test at the 0.05 leve… read more
Math-John
30 satisfied customers
Question 1: As a sample size approaches infinity, how does
Question 1: As a sample size approaches infinity, how does the student's t distribution compare to the normal z distribution? When a researcher draws a sample from a normal distribution, what can one … read more
Osbert12
Master's Degree
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I know the shape of the distribution of sample means is not
I know the shape of the distribution of sample means is not always that of an approximately normal distribution, but how do I explaine why?… read more
Math-John
30 satisfied customers
I need a very basic, and easy to understand explanation for
I need a very basic, and easy to understand explanation for this Statistics question: As a sample size approaches infinity, how does the t distribution compare to the normal z distribution? When you d… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
CASE STUDY EXERCISE 2: Individual incomes. The Data Appendix
CASE STUDY EXERCISE 2: Individual incomes. The Data Appendix describes the file individuals, which contains the total incomes of 55,899 people between the ages of 25 and 65. We will illustrate samplin… read more
Chirag
Master's Degree
10,329 satisfied customers
Hello my question is for Business statistics and it is If the
Hello my question is for Business statistics and it is If the population proportion is .4 with a sample size of 20, then is this sample large enough so that the sampling distribution of it is a normal… read more
Scott
Master's Degree
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Explain these concepts: 1. Degree of freedom 2. Critical
Explain these concepts: 1. Degree of freedom 2. Critical values for Z and t test 3. Z - test and t-test… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Selecting a distribution for inferences on the population mean Suppose
Selecting a distribution for inferences on the population mean Suppose that we want to estimate the mean reading speed of second graders. The random sample of students' reading speeds we choose has a … read more
Scott
Master's Degree
16,043 satisfied customers
For each of the following statements, state whether it is true
For each of the following statements, state whether it is true or false. If it is false, explain why. a) Sample evidence can be used to give proof that a null hypothesis is true. b) When testing a cla… read more
SusanAthena
Master's Degree
Master's Degree
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