Which of the following is(are) point estimator(s)? O 0 3 S
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A: Here we are talking about dependent and independent variables
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A: Correlation coefficient is given by,
Q: If an estimator is unbiased, then: the mean of the estimator is equal to the true value the mean of…
A: Solution: Unbiased estimator : An estimator T is said to be unbiased estimator of a unknown…
Q: If E(x + 4) = 10 and E(x + 4)² = 116 , then the value of standard deviation of X is 16
A: E(X) + 4 = 10 E(X) = 6 E(X2) + 16 +8E(X) = 116 E(X2) = 116 - 16 - 48 E(X2) = 52
Q: Given P(A)=4(ANB), and P(AUB)=0.7, P(B)=0.4, what is P(A)? Hint: Let x be (ANB)
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A: The sample correlation, observed from a sample size of n=45, is r(45) = r = 0.72 while the…
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A: Given that, a random sample X1, X2.....Xn with n>3 is from the exponential distribution with…
Q: 4. Is there any relationship between the math and science scores of the following 5 people? Person…
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Q: We want our estimators to be unbiased. True or False? O True O False
A: True
Q: When it comes to statistics, what is quantification and how is it useful? When is it not useful?
A: Statistics: The term Statistics, in singular sense, means the aggregate of scientific methods which…
Q: 4) Left-tailed test; test statistic value t = 2.06; degrees of freedom df = 20; p-value = %3D 5)…
A: 4) The degrees of freedom is 20 and test statistic value is 2.06.
Q: B) Imagine now, that we want to reexamine the data we collected in the last HW and find out if there…
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Q: we have described the difference between interpretation and extrapolation. Explain, in your own…
A: In extrapolation, we are estimating or forecasting a future value with the given values or in other…
Q: Nine rats run through a maze. The time each rat took to traveres the maze is recorded and these…
A: (i)There is one extreme value in the given data, i.e. 30 min. So, the most appropriate measure of…
Q: Is dotted line a "good fit" to the data in the following graph? [There are 2 correct answers]…
A: Here, R2=0.9963
Q: or what value of 'x' the mode of the following data is 7? 3, 5, 6, 7, 5, 4, 7, 5, 6, (x-1), 8, 7…
A: The mode is the value that appears most frequently in a data set. Given data, 3, 5, 6, 7, 5, 4, 7,…
Q: Find the p values as a range (to 3 decimals places) (a) right tailed test t=1.457, d.f. =14.…
A: From given t=1.457 d.f. = 14
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A: A continuous random variable X is said to have an Exponential λ distribution and has probability…
Q: Data Set: {(-3, 4), (–2, 3), (–1, 3), (0, 7), (1, 5), (2, 6), (3, 1)} 1. The regression line is: y =…
A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to…
Q: Please help me with the steps in statcrunch: Think about a population mean that you may be…
A: For the given problem, the population mean(μ) is 2.5. The data(sample) is said to be on 7 people…
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A: Note: As per guidelines we are supposed to solve only one question at a time. Please repost the…
Q: Find the p-value for the following scenarios. Round your answers to 4 decimals. 1) Right-tailed…
A: We use the standard normal Z distribution table to find the required p-value.
Q: Which of the following is(are) point estimator(s)? σ μ…
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Q: Determine both critical z-scores corresponding to a = 0.2 in a two-tail test. neg. crititical…
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Q: A test was given to a statistics class. Results for each gender and for one student in each gender…
A: Consider, the Z score for female: z=score-μσ =77-793 =-0.667 Consider, the Z score for…
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Q: Q29. Given the Cramer's V coefficient equal to 0.7237, which of the following is TRUE? O There is a…
A: as we know cramer's V is measure of association and its value always between 0 and 1. cramer's v =…
Q: 12. Which of the following is not true about nonparametric tests? a. They are more likely to result…
A: To identify the statement that is not true about nonparametric tests.
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A: We have a uniform distribution U0, θ. We are interested in estimating θ and two estimators are taken…
Q: Two variables have a strong negative correlation. Which of the following statements is most…
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A: From the above parts we haveNull and alternative hypothesis H0 : μ=120H1 : μ >120Significance…
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Q: Give as much information as you can about the P-value of a t test in each of the following…
A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…
Q: Need the H0 and H1 values
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- A test was given to a statistics class. Results for each gender and for one student in each gender are given. From the information provided, determine which student received a relatively higher grade. The female scored a 80 with μ = 84 and σ = 2. The male scored a 76 with μ = 80 and σ = 2. The male student has a higher relative grade than the female student Both students have the same relative grade The female student has a higher relative grade than the male student O Not enough information to determineThe following sample contains values of the price and quantity sold of a particular commodity. Use quantity sold as the dependent variable Y. Price (X) 6.00 3.00 7.00 1.00 2.00 8.00 Quantity sold (Y) 53 67 48 76 70 28 ∑x}=27, ∑y=342, ∑x2=163, ∑xy=1295, ∑y2 = 21062, n=6. d. Find the coefficient of determination and interpret .Pls explain the selected option in 5-6 sentence only Which of the following statement(s) are false? (Select all that apply.) a) Correlation measures the strength of a linear relationship between two quantitative variables.-1 ≤ r ≤ 1 b) The sign of r tells the direction of the linear relationship between two quantitative variables. c) The correlation has the same units (e.g., feet or minutes) as the explanatory variable. d) If the correlation between two quantitative variables is zero, then there cannot be a relationship between these two variables.
- Answer the following questions with complete sentences. When you have finished everything, submit the lab to 'Assignments' folder of Blackboard by Friday, April 10t by 11:59 pm. Imagine a researcher found a positive correlation between two variables, and reported that the r value was +.3. One possibility is that there is a true correlation between these two variables. Discuss one alternative possibility that would alsoVariable A and Variable B are very highly correlated at r = -.89. Joe’s z-score on Variable A is -1.5. Which of the following would be the best guess for his z score on Variable B? a. 0 b. -1.335 c. 1.5 d. -1.5 e. -0.90The following statement contains an error. Choose the statement that best explains the error. "The correlation between shoe size and height is 0.87 inches" A. Correlation requires that both of the variables be categorical B. When stating the correlation coefficient, one must state whether it is a positive or negative relationship C. This statement does not tell us whether or not shoe size is correlated with height D. When reporting correlation, one does not report units because correlation has no units E. There is no error in this statement
- Give as much information as you can about the P-value of a t test in each of the following situations. (Hint: See discussion on page 594. Use a table or technology. Round your answers to three decimal places.) (a) upper-tailed test, df = 7, t = 2.0 (b) lower-tailed test, df = 10, t = −2.4 (c) lower-tailed test, n = 24, t = −4.1 (d) two-tailed test, df = 15, t = −1.8Hi, i have one question. How was the level of significance obtained? at the beginning of the exercise it is clarified that it is (α)=0.05 but I don't know where this value comes fromSuppose that and 2 are unbiased estimators of the parameter . We know that V (₁) - 10and V(₂) - 5. Which E = estimator is the best? Enter the number of estimator, 1 or 2. Statistical Tables and Cl
- Answer.O Briefly decribe the difference be tween estimations and hygorhesis testing. (2)Please no written by hand solution and no img . Pairs of hypotheses about a claim (a statistic of the population, like its mean, μ) include the following: (A) H0: μ ³ k and Ha: μ < k, where k is some value (B) H0: μ = k and Ha: μ ≠ k, where k is some value (C) H0: μ > k and Ha: μ £ k, where k is some value (D) H0: μ £ k and Ha: μ > k, where k is some value (E) H0: μ < k and Ha: μ ³ k, where k is some value