the sum of the probabilities does not equal 1. 0.22+ 0.16+ 0.21 + 0.16 = 0.75 therefore‚ this is not a probability distribution since the sum of the P(x)’s is not 1 2. The final exam in a sociology course consists of 100 multiple-choice questions. Each question has five possible answers‚ and only one of them is correct. An unprepared student makes random guesses for all the answers. Find the mean and standard deviations for the number of correct answers for this student Mean = n (p) Standard
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skills allow for a more comfortable and cohesive environment. I believe that after you have reviewed my application and resume you will see that I possess an excellent skill set which matches your requirements perfectly. If you have any further questions
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Shenise Peterson Statistics Research Paper A. Nikzad March 20‚ 2012 Leonard Euler was born on April 15‚ 1707 in Basil‚ Switzerland (Patterson‚ 1998). He was brought up in the church (Patterson‚ 1998). His father Paul Euler was pastor of a reformed church as well as his mother’s father (Wikipedia‚ 2012). At that time‚ Basel was one of the main locations where mathematics was practiced in Europe (Patterson‚ 1998). Euler started school when he was 7 years old and was tutored by Johann Bernoulli‚ Europe’s
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Exercise 16 Page: 121-122 1. The researchers analyzed the data they collected as though it were at what level of measurement? a) Nominal b) Ordinal (c) Interval/ratio- answer d) Experimental 1 2. What was the mean posttest empowerment score for the control group? Mean= given (n=25)‚(=2428) threfore‚ 2428÷ 25= 97.12 3. Compare the mean baseline and posttest depression scores of the experimental group. Was this an expected finding? Provide a rationale for your answer. This was
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1. What is the difference between R2 and adjusted R2? R2 is a statistic that will give some information about the goodness of fit of a model. In regression‚ the R2 coefficient of determination is a statistical measure of how well the regression line approximates the real data points. An R2 of 1.0 indicates that the regression line perfectly fits the data. Adjusted R2 is a modification of R2 that adjusts for the number of explanatory terms in a model. Unlike R2‚ the adjusted R2 increases only if
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price of houses is higher than the median price. The highest density of data is present in two lower quartiles‚ as can be seen from box plot. This shows that low valued houses are present in bulk‚ and thus must available in the market easily. | | Question 2: Though normal distribution model is not an absolutely apt for the data set of prices‚ the data can still be analyzed by assuming normality owing to the fact that data points hover around the diagonal line of normal Quantile plot. Some data
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The individual probabilities are all between 0 & 1 and the sum = 100% b. What is the probability that a randomly selected request is for one of the three B’s? P(one of the B’s) = P(Bach) + P(Beethoven) + P(Brahms) = 5 + 26 + 9 = 40% c. What is the probability that a randomly selected request is for a Mozart piece? P(Mozart) = 21% d. What is the probability that a randomly selected request is not for one of the two S’s? P(not Schubert or Schumann)
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Please read Article 1 and then answer the questions 1 - 4 45‚000 U.S. deaths to lack of insurance By Susan Heavey Susan Heavey – Fri Sep 18‚ 8:22 am ET. WASHINGTON (Reuters) – Nearly 45‚000 people die in the United States each year -- one every 12 minutes -- in large part because they lack health insurance and cannot get good care‚ Harvard Medical School researchers found in an analysis released on Thursday. "We’re losing more Americans every day because of inaction ... than drunk driving and
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NAME: SHU ZHAOHUI ID: 17329164 Q5. Descriptive Statistics | | N | Minimum | Maximum | Mean | Std. Deviation | Skewness | | Statistic | Statistic | Statistic | Statistic | Statistic | Statistic | Std. Error | Gasolinescore | 1000 | 3.00 | 21.00 | 14.9090 | 4.83654 | -.493 | .077 | Globalscore | 1000 | 3.00 | 21.00 | 17.0490 | 3.78774 | -1.073 | .077 | Valid N (listwise) | 1000 | | | | | | | The mean in the gaslinescore and globalscore stand for the average the respondents choose is
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Test 4A AP Statistics Name: Directions: Do all of your work on these sheets. Part 1: Multiple Choice. Circle the letter corresponding to the best answer. 1. I measure a response variable Y at each of several times. A scatterplot of log Y versus time of measurement looks approximately like a positively sloping straight line. We may conclude that (a) the correlation between time of measurement and Y is negative‚ since logarithms of positive fractions (such as correlations) are negative
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