a. Compute the population variance. b. Compute the population standard dexiation
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Q: c) A research conducted by SSTA022 Class representative at the University of Limpopo indicates that…
A: There are two independent samples which are active and inactive African men. We have to test whether…
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Q: c) A research conducted by SSTA022 Class representative at the University of Limpopo indicates that…
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Q: c) A research conducted by SSTA022 Class representative at the University of Limpopo indicates that…
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Q: A research conducted by SSTA022 Class representative at the University of Limpopo indicates that…
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- Provide a mathematical proof for the transformation of weighted mean with weights Wi, i = 1, ... , n, a measure of location, when all values of data are shifted by a constant a E R. Further, provide a mathematical proof of a statement about the transformation of sample variance, a measure of variability, when all values of data are multiplied by a positive constant b E R, b > 0.Systematic variability occurs when: A. there are too many control variables B. there is a lot of variability in the data C. there is a design confound D. there are too many dependent variableThe pooled variance is 30.68. Calculate the individual estimated variance for population 1 and population 2.
- Which of the following can increase effect size? Select one: O a. increase the distance between means and increase the sample size O b. decrease the variability and increase the distance between means O c. decrease the variability and increase the sample sizeIn a population-based cohort study, an entire community was interviewed regarding smoking habits and then followed for one year. Upon ascertainment of all lung cancer deaths, the investigator obtained the following data: Number of Individuals Lung Cancer Deaths Smokers 24,500 15 Nonsmokers 10,500 2 Calculate the risk difference per 100,000 per year. Round to the tenth decimaWhich of the following is not an assumption/condition when comparing two proportions. Success/Failure condition Independent groups assumption Independence/Randomization condition Nearly Normal condition 10% Condition
- Q.No.1. Read the following passage and observe the word length of each word. Make a frequency distribution of word length. "Statistics play an intrinsic role in computer science and vice versa. Statistics is used for data mining, speech recognition, vision and image analysis, data compression, artificial intelligence, and network and traffic modeling. A statistical background is essential for understanding algorithms and statistical properties that form the backbone of computer science. Typically, statistical approach to models tends to involve stochastic (random) models with prior knowledge of the data. The computer science approach, on the other hand, leans more to algorithmic models without prior knowledge of the data. Ultimately, these come together in attempts to solve problems."In Exercises 5–16, use analysis of variance for the indicated test. Lead and Full IQ Scores Example 1 used measured performance IQ scores for three different blood lead levels. If we use the same three categories of blood lead levels with the full IQ scores, we get the accompanying Excel display. (The data are listed in Data Set 7 “IQ and Lead” in Appendix B.) Using a 0.05 significance level, test the claim that the three categories of blood lead level have the same mean full IQ score. Does it appear that exposure to lead has an effect on full IQ scores? ExcelThe number of daily proposals received by a developing country's government from enterprises interested in winning a contract for the construction of a new port facility is listed below. 2 3 2 4 3 5 2 1 6 4 7 2 5 1 6 Find population mean, median, mode, variance and standard deviation of the above data.(Step by step solution)
- . Each member of a large genetics class grows 12 pea plants from an independent pea family. Each family is expected to have 3/4 plants with smooth peas and 1/4 plants with wrinkled peas. a. On average, how many wrinkled pea plants will a student see in her 12 plants? b. What is the standard deviation of the proportion of wrinkled pea plants per student? c. What is the variance of the proportion of wrinkled pea plants per student? d. Predict what proportion of the students saw exactly two wrinkled pea plants in their sample.Historically it has been observed that patients admitted to a certain hospital for treatment of influenza spend a MEAN length of 4.4 days in the hospital. Every flu season, different strains of the flu circulate: Some years the primary strain causes more severe illness (and presumably longer than average hospital stays) and other years less so (meaning presumably shorter than average stays). We assume the hospital stays are NORMALLY distributed. a. A hospital wants to see how this year's flu season compares to previous years. Therefore, state the null and alternate hypotheses that would be used to test whether the hospital is seeing a mean hospital stay that is significantly DIFFERENT than the historical mean of 4.4 days. b. FIFTEEN patients admitted for influenza treatment are then randomly sampled and the length of their hospital stay in days is given below. 4641056443743774 SAMPLE MEAN =? SAMPLE STANDARD DEVIATION =? c. Using the results of part (b), determine what type of test is…Dr. Maddan's eye drops are supposed to cause significant reduction is eye redness. The following table shows the results of a recent study where a random sample of individuals took part in a placebo controlled study. No Reduction in Redness Reduction in Redness Total Eye Drops 120 220 340 No Eye Drops Total 120 140 260 240 360 600 With 5% level of significance, determine if eye redness reduction is dependent upon taking the eye drops. Provide, a. the Chi-square statistic. b. the critical value or the p-value. c. Your decision on whether or not to reject Ho.
