Discuss merits and demerits of variance.
Q: 3. Customers at a gas station pay with a credit card (A), a debit card (B), or cash (C). Assume that…
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Q: What is the variance? 3.7 4.1 3.2 4 3.8 3.6 3.7 3.4
A: Given:The data values are as follow:3.7, 4.1, 3.2, 4, 3.8, 3.6, 3.7, 3.4
Q: A factor in determining the usefulness of an examination as a measure of demonstrated ability is the…
A: From the provided information, Sample size (n) = 29 Sample variance (s) = 69 Population variance (σ)…
Q: What is the similarity between one-way ANOVA and a t-test?
A: Answer: A
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Q: (a) Consider the following set of a sample data: 320 320 330 320 320 330 500 320 320 310 300 320 320…
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Q: 5. Below is data on car crashes of small, midsize and large cars. The load (pounds) on left and…
A: Output:
Q: We can eliminate some outlier problems by using O a. Interquartile range O b. Range O C. Coefficient…
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Q: A factor in determining the usefulness of an examination as a measure of demonstrated ability is the…
A: From the provided information, Sample size (n) = 27 Standard deviation (s) = 71
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Q: A factor in determining the usefulness of an examination as a measure of demonstrated ability is the…
A: Given, The value of the chi-square statistic for the sample is 32.21. Degrees of freedom is 23.
Q: 3.How do you know if 2 sets of data is pooled? Group of answer choices If the variances are not…
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Q: 5 Brand Y kits yielded a variance of 2.30, test the claim that the two testing kits have different…
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Q: An alternative hypothesis must include the anticipated direction of variance. True False
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Q: latör ör Please show all of your work, including what commands you used on you 5. Below is data on…
A: Level of Factor A, a = 2 Level of Factor B, b = 3 Number of repetition, r = 7 df(A) = a-1 = 1 df(B)…
Q: The variance caused by random, unsystematic differences is called _____.
A: This is the concept of ANOVA
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Q: A factor in determining the usefulness of an examination as a measure of demonstrated ability is the…
A: Hey, since there are multiple subparts posted, we will answer first five (up to hypothesis testing)…
Q: Classify the following sentence as True or False: Co-variance implies causation
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Q: xplain in a sentence what a certain Cohen’s d means. Explain in a sentence what a certa
A: solution:
Q: We can eliminate some outller problems by using O a. Coefficient of variation O b. Interquartile…
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Q: Quarter Quarter Quarter Quarter A C D 130 18 90 25 What is the sample mean and variance (in that…
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- The sample variance is affected by extreme observations. * O True O False3. Without some correction, sample variability is said to be "biased." Define the term biased, and explain how this bias is corrected in the formula for sample variance. %3DWhat is the difference between Micro and M? a. Micro (u) is the variance and M is the mean b. Micro (u) i sthe median and M is the mean c.Micro (u) is the mean of the sample and M is the mean of the population d. Micro (u) is the mean of the population and M is the mean of the sample
- Suppose that Mario owns a company that rents moving vans. Mario’s customers pay $22$22 per day to rent a van and an additional $0.59$0.59/mi. Thus, a customer who rents a van for one day and drives it ?x miles must pay a total cost of ?=22+0.59?.C=22+0.59x. Over the last two months, Mario had 3030 customers who made one-day rentals. All together, these customers drove the vans a combined 3300 mi.3300 mi. Find the mean cost for these customers. Round the answer to the nearest cent.Construct a numerical example, i.e., a data set, such that a two-sample t-test will yield an insignificant test result but a pair t-test will yield a significant test result. (For the two-sample t-test, you can either assume equal variances or unequal variances, which will not affect the key idea of this question.) I need to know how this is possible and what the basics of making this data set should be.A factor in determining the usefulness of an examination as a measure of demonstrated ability is the amount of spread that occurs in the grades. If the spread or variation of examination scores is very small, it usually means that the examination was either too hard or too easy. However, if the variance of scores is moderately large, then there is a definite difference in scores between "better," "average," and "poorer" students. A group of attorneys in a Midwest state has been given the task of making up this year's bar examination for the state. The examination has 500 total possible points, and from the history of past examinations, it is known that a standard deviation of around 60 points is desirable. Of course, too large or too small a standard deviation is not good. The attorneys want to test their examination to see how good it is. A preliminary version of the examination (with slight modifications to protect the integrity of the real examination) is given to a random sample of…
- Prepare a layout and resulting analysis of variance (a) table for five types of fertilizers viz., A, B, C, D, and E and two blocking factors viz., varying soil fertility and varying seeds. Answer:thanks for attempting my question. would appreciate a quick response and an explanation. thanks Question 1 of 4 Assume that we have 6 manifest variables and 3 factors. The communality of 3 on variable 74 is obtained with the following: 34 O B. Y 34 O D. Y43 Question 3 of 4 Assume we have 6 manifest variables and 3 factors. The proportion of variance in the 2nd manifest variable accounted for by all of the factors can be represented as follows: O A. 22 О в. C. 13 33 Y 63 O D. 2-2; = Y21 +?22+?23The variance in a production process is an importance measure of the quality of the process. A large variance often signals an opprotunity for improvement in the process by finding ways to reduce the process variance. The conduct a statistical test to determine whether there is a significant differeence between the variance in the bag weights for two machines. Use a 0.05 level of significance. What is your conclusion? Which machine, if either, provides the greater opportunity for quality improvements? Machine 1 Machine 2 2.95 3.22 3.45 3.30 3.50 3.34 3.75 3.28 3.48 3.29 3.26 3.25 3.33 3.30 3.20 3.27 3.16 3.38 3.20 3.34 3.22 3.35 3.38 3.19 3.90 3.35 3.36 3.05 3.25 3.36 3.28 3.28 3.20 3.30 3.22 3.28 2.98 3.30 3.45 3.20 3.70 3.16 3.34 3.33 3.18 3.35 3.12 Please use excel
- A factor in determining the usefulness of an examination as a measure of demonstrated ability is the amount of spread that occurs in the grades. If the spread or variation of examination scores is very small, it usually means that the examination was either too hard or too easy. However, if the variance of scores is moderately large, then there is a definite difference in scores between "better," "average," and "poorer" students. A group of attorneys in a Midwest state has been given the task of making up this year's bar examination for the state. The examination has 500 total possible points, and from the history of past examinations, it is known that a standard deviation of around 60 points is desirable. Of course, too large or too small a standard deviation is not good. The attorneys want to test their examination to see how good it is. A preliminary version of the examination (with slight modifications to protect the integrity of the real examination) is given to a random sample of…A factor in determining the usefulness of an examination as a measure of demonstrated ability is the amount of spread that occurs in the grades. If the spread or variation of examination scores is very small, it usually means that the examination was either too hard or too easy. However, if the variance of scores is moderately large, then there is a definite difference in scores between "better," "average," and "poorer" students. A group of attorneys in a Midwest state has been given the task of making up this year's bar examination for the state. The examination has 500 total possible points, and from the history of past examinations, it is known that a standard deviation of around 60 points is desirable. Of course, too large or too small a standard deviation is not good. The attorneys want to test their examination to see how good it is. A preliminary version of the examination (with slight modifications to protect the integrity of the real examination) is given to a random sample of…Answer A & B
