Kim Graves 19-November-2013 ED-D 560 John Walsh Assignment 4 Once again Professor Schmedlap has brought forward his reading program and requested it be compared with the new and old basal reading programs. Given this information‚ we will create the hypothesis: that there is at least one pair of means that is statistically significant. That is to say that Schmedlap’s reading program will be significantly better than at least one of the other two programs. Our null hypothesis is that there is no
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Blackboard Problem Set #6a 1. Consider the joint probability distribution of X and Y: x = 2 x = 4 y = 1 0.3 0.2 y = 2 0.1 0.4 What is E(X|y = 1) (rounded to four decimal places)? 2. Consider the joint probability distribution of X and Y: x = 2 x = 4 y = 1 0.3 0.2 y = 2 0.1 0.4 What is E(Y|x = 4) (rounded to four decimal places)? 3. Undergraduates are asked to write a 300-word essay. The
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The primary goal of this research is to find out whether the display of red by a female can increase her attraction to a male significantly. In this research‚ the researchers dis more observations than self-report is because self-report data have well-known limitations in comparison to direct observations of human behavior. We are finding some common reactions across species. Apparently‚ examinations of behavior represent a more direct test of parallels between human and non-human functioning with
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STATISTIC (1) A study of the number of cars sold looked at the number of cars sold at 500 Dealers The smallest dealer had 11 cars sold and the largest had 154 cars sold. If you were going to create a frequency distribution of the number of cars sold using six classes in your frequency distribution‚ which of the following might be a reasonable first class? (a) 0 to 25
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1. Assume 20% of all email is spam. A large Internet provider plans on conducting a survey of 900 emails to see what percentage are spam. a. What is the probability they will get a proportion greater than 0.1836? b. If they get a sample proportion over 24% they are going to shut down their email server. What is the probability this will happen? 2. A survey is done to estimate the proportion of U.S. adults who think that cell phone use while driving should be illegal. In the survey‚ 54%
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Population and Sample Our topic is about harmful effects that can affect a student’s performance in school and daily life. Our population of interest would be college students as they are the demographic most subject to many negative influences. Our sample would be stratified because we want to compare the answers of each of the classes: freshman‚ sophomores‚ juniors‚ and seniors. As a result‚ we would be able to see what types of harmful effects each class of students are most concerned about
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Chapter 1 Statistics is the science of: -Planning studies and experiments -Collecting data -Organizing‚ summarizing‚ and presenting -Analyzing -Drawing conclusions based on the data -Population: the complete collection of all measurements or data that are being considered. -Sample: sub collection of members selected from a population. -Census: collection of data from every member of a population. What does Statistics Do? -Collect data -Summarize the dataset collected -Make inferences
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1. The mean incubation time of fertilized eggs is 22 days. Suppose the incubation times are approximately normally distributed with a standard deviation of 1 day. (A) The 19th percentile for incubation times is ____ days? (round to the nearest whole number as needed (B) The incubation times that make up the middle 39% are ___ to ___ days? (round to nearest whole number‚ use ascending order) 2. As reported by a recent survey‚ the mean height of females 20 to 29 years old is 63.6 inches. If the
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Cigarette Smoking Over the years‚ researchers have been trying to connect smoking to lung cancer. They have finally come to this conclusion and are now trying to link smoking to other coronary heart diseases. Research has been done in many countries‚ and the results have shown that there was a moderate relationship to cigarette consumption and heart diseases. Through a regression‚ it has been proven that there is a link to the two factors. The U.S is also trying to cut their consumption in half
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University of Phoenix Material Week Five Quiz Terms and Definitions matching _C__ Statistics _N__ Discrete variable _ __ Statistics _S_ Continuous variable _J__ Population _ F__ Qualitative data _L__ Population parameters __R_ Quantitative data _G__ Sample __H_ Mean _B_ Bias _D Mode _O__ Representative sample _Q__ Median _P__ Experimental study _T__ Unimodal __A_ Observational study __K_ Relative frequency _I__ Double-blind study _E__ Standard deviation
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