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- Suppose 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 ClThe data below are the temperatures on randomly chosen days during the summer and the number of employee absences at a local company on those days. Test the claim, at the α = 0.05 level of significance, that a linear relation exists between the two variables, Apply classical and traditional approaches. Show step1-step3.Use RStudio
- Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (μ, p, σ) for the indicated parameter. The manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to maintain a true mean temperature, μ, of 48° F, ideal for a certain type of German pilsner. The owner of the brewery does not agree with the refrigerator manufacturer, and claims he can prove that the true mean temperature is incorrect. Group of answer choices H0 : μ ≤ 48°H1 : μ > 48° H0 : μ ≥ 48°H1 : μ < 48° H0 : μ ≠ 48°H1 : μ = 48° H0 : μ = 48°H1 : μ ≠ 48°Which of the following tables can be used as a more exact substitute for the empirical rule? t table chi squared table O F table O z tableWhich of the following can be assessed by a dependent T-Test? Group of answer choices the score means of two distinct group the score means of pre and post tests from same participants the score means of three distinct group
- Q1. A psychologist conducted a study on the relationship between introversion and shyness. The values are results for scales of introversion and shyness. High positive scores on each scale indicate high introversion or shyness; and high negative scores indicate low introversion or shyness. Data collected from 10 people as follows: Introversion 4 -7 -1 0 6 7 -4 -9 -5 8 Shyness 11 -7 -1 -3 0 7 -1 -8 -1 5 a) Compute the correlation coefficient relating introversion and shyness scores. b) Find the regression equation which predicts introversion from shyness. c) What introversion score would you predict from a shyness score of 7?Claim: A majority of adults would erase all of their personal information online if they could. A software firm survey of 636 randomly selected adults showed that 58% of them would erase all of their personal information online if they could. Complete parts (a) and (b) below. Express the original claim in symbolic form. Let the parameter represent the adults that would erase their personal information.Claim: More than 3.9% of homes have only a landline telephone and no wireless phone. Sample data: A survey by the National Center for Health Statistics showed that among 14,682 homes 5.83% had landline phones without wireless phones. Complete parts (a) and (b). a. Express the original claim in symbolic form. Let the parameter represent a value with respect to homes that have only a landline telephone and no wireless phone. > 0.039 Р (Type an integer or a decimal. Do not round.) b. Identify the null and alternative hypotheses. Ho H₂₁: (Type integers or decimals. Do not round.) ▼
- EDFN 1090/1092 Assignment #5 1. Would you expect a positive, negative, or zero correlative between each of the following pairs of variables? a. Heights of mothers and daughters b. Age and reaction time in the adult population c. Natural gas usage and prevailing (outside) temperature d. Reading skill and shoe size in the population of individuals over 18 2. A researcher hypothesized that there is a relationship between self-esteem and social responsibility, which increases with age. The researcher gave self-esteem and social responsibility inventories to two sets of people: a group of 10 high school students and 10 adults. The data collected are given below (SE = self- esteem; SR = social responsibility). High School Students SE. 10 12 13 PASH6809 11 5 14 10 SR 21 20 16 18 112128 19 17 19 10 13 20 HARDHSCDHSH SE 13 15 12 14 8 6 12 11 9 14 Adults HENNARSDDKSG 23 24 21 20 18 12 19 18 15 20 years old a. Calculate the correlation for adults given the values below. (Let X = SE, Y = SR) Σ ΧΥ…The head of the marketing division of a leading chocolate manufacturer must decide among our different wrapper styles for the chocolate. To provide a database for the decision, he has the chocolate placed in the different wrappers and distributes them to five supermarkets. At the end of 2 weeks, he finds that the following amounts of chocolate were sold: Wrapper A Wrapper B Wrapper C Wrapper D 90 98 130 82 State the dependent and independent variable Is this directional or non directional testFrom the following situations, which one identifies the independent variable and dependent variable correctly? a) The more time people spend using social media, the less able they are to express themselves in conversation. The independent variable is the expression in conversation while the dependent variableis the time spent usingsocial media. b) Taking a nap in the afternoon makes people more relaxed andless irritable for the rest of the day. The independent variable is the level ofrelaxation and irritability of a personfor the rest of the day while the dependent variable is taking a nap in the afternoon. c) The relationship between the amount of violence that childrensee on television and the amount of aggressive behavior they display. The independent variable is amount of aggressive behavior display by childrenwhile the dependent variable is the amount of violence that children see on television. d) Does attentiveness in classinfluence teacher's effectiveness? The independent…
