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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A: Suppose that the New England Colonials baseball team is equally likely to win any particular game as…
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Q: = .7 and p, = .6. Test Ho: (P, – P2) =0 against Ho: (P, - P2) >0 using. .05 a =
A: Hypothesis testing about the difference between two population proportions is otherwise called…
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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
Q: C o n s t r u c t a F r eq u e n c y D i s t ri b u t i o n . 43 52 56 48 42 40 46…
A: Introduction: Relative frequency: The relative frequency of any class interval is the ratio of the…
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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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A: The random variable X follows normal distribution. We have to test the population proportion is less…
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Q: Calculate the following probabilities, to two decimal places: If P(A)=0.46, P(B)=0.59, and P(A or…
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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…
Q: Setup a one-tailed test for the hypothesis that grades are improving and calculate the value of the…
A: Given data number of success , x= 76 sample size, n =411 population proportion,p= 0.15…
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A: Let there are n trials and each having two outcomes - Success and Failure. The trials are…
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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A: Levels of Measurement: Levels of measurement or scales of measurement indicate the accuracy with…
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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- Consider the following knowledge base and infer HasExcitingLife(Ali) using appropriate inferencealgorithm. Knowledge Base:i. ∀x ¬Poor (x) ∧ Smart(x) ⇒ Happy (x)ii. ∀x Reads(x) ⇒ Smart(x)iii. Reads(Ali) ∧ ¬Poor(Ali)iv. ∀x Happy(x) ⇒ HasExcitingLife(x)Choose the options that would create a true statement. In this study, there [ Select ] ["was no", "was"] replication, and there [ Select ] ["was no", "was a"] balanced design.A Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people.† Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated. Nurse TaxAuditor Fast-FoodWorker 3 4 5 4 5 8 6 4 6 2 4 8 3 6 5 3 3 6 4 5 6 5 3 4 (a) Use ? = 0.05 to test for differences in the belief that a person's job is likely to be automated for the three professions. State the null and alternative hypotheses. H0: μNurse = μTax auditor = μFast-food worker Ha: μNurse ≠ μTax auditor ≠ μFast-food worker H0: At least two of the population means are equal. Ha: At least two of the population means are different. H0: Not all the population means are equal. Ha: μNurse = μTax auditor = μFast-food worker H0: μNurse = μTax auditor = μFast-food worker Ha:…
- it did not accept that as an answer in this reading and participation questionA Pew Research study conducted in 2017 found that approximately 75% of Americans believe that robots and computers might one day do many of the jobs currently done by people.† Suppose we have the following data collected from nurses, tax auditors, and fast-food workers in which a higher score means the person feels his or her job is more likely to be automated. Nurse TaxAuditor Fast-FoodWorker 4 4 5 4 5 8 5 6 6 2 3 8 2 6 5 3 3 6 4 5 5 6 2 5 (a)Use ? = 0.05 to test for differences in the belief that a person's job is likely to be automated for the three professions. State the null and alternative hypotheses. 1. H0: μNurse = μTax auditor = μFast-food worker Ha: Not all the population means are equal. 2. H0: Not all the population means are equal. Ha: μNurse = μTax auditor = μFast-food worker 3. H0: At least two of the population means are equal. Ha: At least two of the population means are different. 4. H0: μNurse ≠ μTax auditor ≠ μFast-food worker…Were any assumptions required in order for this inference to be valid?a. Yes, the sample of network 1 ad-breaks must be independent of the sample of network 2 ad-breaks.Each population must be normally distributed, i.e. the population of all ad-breaks shown on network 1 have lengths that must be normally distributed and the population of all ad-breaks shown on network 2 have lengths that must be normally distributed.b. Yes, the sample of network 1 ad-breaks must be independent of the sample of network 2 ad-breaks.The Central Limit Theorem applies, which states the sampling distribution is normal for any population distributions.c. No. The Central Limit Theorem applies, which states the sampling distribution is normal for any population distributions.d. Yes , each population must be normally distributed, i.e. the population of all ad-breaks shown on network 1 have lengths that must be normally distributed and the population of all ad-breaks shown on network 2 have lengths that must be…
- identify the following:d) Decision Rulee) Test Statisticsf) Decisiong) ConclusionIs the Naive Bayes technique appropriate for use in all classification situations, or are there some in which it should be avoided?Out of 295 penalty kicks in soccer, the following table shows the direction the goalie jumped, and the direction of the kick. Use a 0.05 significance level to test the claim that the goalies jump and the strikers kick are independent.
- A nonprofit organization conducted a survey of 2140 metropolitan-area teaches regarding their beliefs about problems that hamper students’schooling. The following data were obtained:-900 said that lack of parental support is a problem.-890 said that abused or neglected children are problems. -680 said that malnutrition or students in poor health is a problem-120 said that lack of parental supportand abused or neglected children are problems-110 said that lack of parental support and malnutrition or poor health are problems-140 said that abused or neglected children and malnutrition or poor health are problems-40 said that lackof parental support, abuse or neglect, and malnutrition or poor health are problemsWhatis the probability that a teacher selected at random from this group said that lack of parental support is the only problem hampering students’schooling?Question 2Jimmy is the education consultant of a tutorial school, which arranges preparatory classes for IELTexamination. He randomly checks the mock examination result of 22 students in the school and the resultsare as follow:7.9 8.2 7.8 5.4 6.8 6.8 7.1 7.2 7.9 8.1 7.67.8 5.8 6.3 7.7 7.7 8.3 8.3 4.7 5.1 7.3 6.5(a) Write a report to reflect students’ ability in the mock examination. The report needs to include theaverage performance, the median, the standard deviation, the bottom 20% and top 10% performance level.(b) The manager asks if the distribution of the examination result looks like a normal distribution. Answerhis question by reviewing the skewness of the data with detailed calculation.(c) There are 18 students in Alex’s class. By using the sampled data as a reference to project the chance anindividual student can get more than 6 marks and assume students’ result are independent, calculate theprobability that more than 80% of Alex’s students can score higher than 6 marksin the…A city is accused of having a non-diverse police force that does not fully represent the various ethnicities who reside there. Data from the most recent census are given in the table below, as well as results from a sample of 133 randomly chosen police officers. Ethnicity White African-American Latino Asian Other % of city population 41.0% 29% 18% 9.8% 2.2% Number of police officers 67 32 20 7 7 (a) Which hypotheses should be tested to determine if the ethnic make-up of the police force is consistent with the city's population?H0: , implying the police force ethnicity is (consistent/ inconsistent) with the city's population.Ha: , implying the police force ethnicity is (consistent/ inconsistent) with the city's population.(b) The residual for the African-American category is -1.058. What does the negative sign imply?There are (more/ fewer) African-American police officers than expected for this city.(c) The test statistic is 13.085. What is the p-value? (Use 4…
