Which of the following is a probabilistic sampling approach that does not require the use of a sampling frame?
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Q: P(X ¢ (µ – V20, µ + v20)) < 112
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Q: = .7 and p, = .6. Test Ho: (P, – P2) =0 against Ho: (P, - P2) >0 using. .05 a =
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Q: Find a 95% confidence interval for the population mean μ of total calcium in this patient’s blood.
A: here given , n = sample size = 10 sample mean = 9.95 sample standard deviation = 1.02
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A: Given data : 100.23 , 100.11 , 100.42 , 99.66 , 99.68 , 100.14 , 100.33 , 100.10 , 99.50 , 100.21…
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A: Mean(µ) = 50Standard deviations (σ) = 6 n = 100
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A: Given : X Y 226 15.9 270 15.6 362 15.3 482 15.3 524 14.8
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Q: 1. (a) The probability density function for a random variable X is given by a, 0 0.5).
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Q: Consider a continuous random variable X with pdf f,(x). If f(x) = 0 for x a} 0
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Q: For the stem and leaf given below, determine the following: 1. P10, 2. Standard deviation
A: For the given stem and leaf , we need to determine the following: 1. P10, 2. Standard deviation
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Q: The range, like the mean has the disadvantage of being influenced by outliers True False O
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Q: (score- mean) Deviation Scores (score – mean) squared Deviation Scores Squared Scores 88 22 84 18 84…
A: Standard Deviation The standard deviation is a value that indicates how far data for a group…
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Q: /hat are the benefits of researchers and students utilizing secondary analysis?
A: We want to know benefits of secondary study.
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A: Given For 16) n=11 For 17) Z=-1.73
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A: Given the following table shows the data collected from four random samples of 50 students from a…
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Q: Here are summary statistics for randomly selected weights of newborn girls: n= 232, *= 32.2 hg,…
A: Given n=232 Mean=32.2 Standard deviations=7.4
Q: Find the probability that an individual man’s step length is less than 2.3 feet.
A: Suppose that the walking step lengths of adult males are normally distributed with a mean of 2.6…
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Q: Part IlI. Classifying the Test Instruction. Determine whether the hypothesis test is left-tailed,…
A: Null and alternative hypotheses: The hypothesis, which is pre assumed as true, tentatively settled…
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A: One sided question
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Q: bility of randomly selecting a smartphone user and getting a response other than "yes" is teger or a…
A: Given P(A)=0.83
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Q: Question 2 A manufacturing company hired a consulting firm to identify quality control issues. The…
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Q: How can they tell that this is a two-tailed test?
A: From the given information we find the solution.
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- What is a sample space?What is meant by the sample space of an experiment?A Kaiser Family Foundation poll for US adults in 2019 found that 79% of Democrats, 55% of Independents, and 24% of Republicans supported a generic National Health Plan". There were 347 Democrats, 298 Republicans, and 617 Independents surveyed.a.) A political pundit on TV claims that a majority of Independents support a National Health Plan. Do these data provide strong evidence to support this type of statement? Use = 0.05.
- A manager wants to see if geographical region (Cape Town, Durban and Gauteng) is related with ownership of a tablet (“Have a tablet” and “No tablet”). Define the null hypothesis and the alternative hypothesis. A. H1: Geographical region and ownership of a tablet are independent vs H0: No relationship exists between Geographical region and ownership of a tablet B. H0: Geographical region and ownership of a tablet are independent vs H1: A relationship exists between Geographical region and ownership of a tablet C. H1: Geographical region and ownership of a tablet are independent vs H0: Geographical region is dependent on ownership of a tablet D. H0: A relationship exists between Geographical region and ownership of a tablet vs H1: No relationship exists between Geographical region and ownership of a tabletA researcher wants to investigate whether mindfulness training improves ability for employees to notice positive experiences in the workplace, and if this differs by gender and/or disposition. Employees were randomly assigned to one of two groups: no training or a half-day session. Gender was categorized as male or female. Disposition was categorized as follows: optimist, pessimist or realist. Ability to notice positive experiences in the workplace was quantified using a Likert-based ambulatory assessment. A factorial design was used to analyze the data. Question: How many factors are there?A researcher wants to investigate whether mindfulness training improves ability for employees to notice positive experiences in the workplace, and if this differs by gender and/or disposition. Employees were randomly assigned to one of two groups: no training or a half-day session. Gender was categorized as male or female. Disposition was categorized as follows: optimist, pessimist or realist. Ability to notice positive experiences in the workplace was quantified using a Likert-based ambulatory assessment. A factorial design was used to analyze the data. Question: If there is a main effect of Disposition, would Tukey’s HSD need to be calculated? Why or why not?
- A researcher wants to investigate whether mindfulness training improves ability for employees to notice positive experiences in the workplace, and if this differs by gender and/or disposition. Employees were randomly assigned to one of two groups: no training or a half-day session. Gender was categorized as male or female. Disposition was categorized as follows: optimist, pessimist or realist. Ability to notice positive experiences in the workplace was quantified using a Likert-based ambulatory assessment. A factorial design was used to analyze the data. Question: How many null hypotheses (and thus, F-ratios) are there in this scenario?You may need to use the appropriate technology to answer this question. In a study conducted to investigate browsing activity by shoppers, each shopper was initially classified as a nonbrowser, light browser, or heavy browser. For each shopper, the study obtained measure to determine how comfortable the shopper was in a store. Higher scores indicated greater comfort. Suppose the following data were collected. Light Browser Heavy Browser Nonbrowser 6 5 7 6 5 5 3 4 7 3 4 4 5 4 7 (a) Use a = 0.05 to test for differences among comfort levels for the three types of browsers. State the null and alternative hypotheses. O Hn: Not all the population means are equal. Ha: HNB = "LB = HHB O Ho: HNB = HLB - HHB H: HNB * HLB * HHB O H,: At least two of the population means are equal. H.: At least two of the population means are different. O Ho: HNB * HLB * HHB H: HNB = HLB = HHB O Ho: HNB = HLB - HHB H.: Not all the population means are equal. Find the value of the test statistic. (Round your answer…A researcher wants to investigate whether mindfulness training improves ability for employees to notice positive experiences in the workplace, and if this differs by gender and/or disposition. Employees were randomly assigned to one of two groups: no training or a half-day session. Gender was categorized as male or female. Disposition was categorized as follows: optimist, pessimist or realist. Ability to notice positive experiences in the workplace was quantified using a Likert-based ambulatory assessment. A factorial design was used to analyze the data. Question: What is the dependent variable?
- A researcher wants to investigate whether mindfulness training improves ability for employees to notice positive experiences in the workplace, and if this differs by gender and/or disposition. Employees were randomly assigned to one of two groups: no training or a half-day session. Gender was categorized as male or female. Disposition was categorized as follows: optimist, pessimist or realist. Ability to notice positive experiences in the workplace was quantified using a Likert-based ambulatory assessment. A factorial design was used to analyze the data. Question: What is the factorial notation for this design?a. write a research question b. state the null and alternative hypotheses c. calculate the test statisticCars and trucks We have data on the city and highwayfuel efficiency of 316 cars and 316 trucks.a) Would it be appropriate to use paired t methods tocompare the cars and the trucks?b) Would it be appropriate to use paired t methods tocompare the city and highway fuel efficiencies ofthese vehicles?c) A histogram of the differences (highway – city) isshown. Are the conditions for inference satisfied?