1convenience sample-bias-easiest to get 2frequencynumber of occurrences 3relative frequencyfrequency divided by sum of frequencies 4conditional distributionhold the value of one of the variables constant and examine the distribution of the other 5how to display quantitative data?histogramsteam and leafdot plots 6bimodal distributiontwo modes causes a double peak in graph 7how to describe distributtion?shapecenterspread 8Skewed RightDistribution that spreads far toward the higher values. median<mean 9Symmetric Distribution a density curve where the right half is a mirror image of the left half of the distribution. (Mean = median) 10outlierAn observation that falls outside the overall pattern of the data set.Q1-1.5IQR 11how to reexpress data?square rootlognatural log (ln) 12z-score(value-mean)/standard deviation 13what to report in a symmetric distribution?meanstandard deviationvariance 14what to report in a skewed distribution?medianIQRrange 15what to do when shifting in a data set?add to mean but keep the s.d the same 16what to do when rescaling in a date set?multiply both mean and s.d by the numberwhen we get to a stop light, it has to be either red, green, or yellow. The p(red) = 0.61. P(green) =0.35. and P(yellow) =0.04. You travel this intersection everyday. What is the probabability the light will be yellow two days in a row when you arrive?B. 0.0016 110Given th independent random variables with means and standard deviations as show, find the mean and standard deviations of each of these variables: mean SDX 100 13Y 310 16FInd the mean ans SD for the random variable "5X-8Y"E (5X-8Y) = ...........SD (5X-8Y)=...........B. -1980, 143.56 111In a relay event, four swimmers swim 100 yards, wach using a different stroke. A college team looks at the times for the swimmers and creats a model based on the asusmptuns that the swimmers' performances are independent, each swimmer's times follow a normal model, and the means and standard deviations of the times in seconds are as shown in the table.What are the mean and the standard deviation for the relay team's total ti in this event?A. U = 197.3, SD = 0.446 112A couple plans to have children until they get a girl, but they agree they will not have more than three children, even if all are boys. Assume that the probablility of having a girl is 55.00%. Find the expected number of boys they will have:A. 0.2475, B. 0.2025, C. 1.6525 or D. 0.7436D. 0.7436 113A wheel comes up green 50% of the time and red 50% of the time. If it comes up green, you win $100, if it comes up red you win nothing. Intuitively, how much do you expect to win on one spin, on average?A. $0, B.$50, C.$100, D. Intuition does not play a part in statistics.B. $50 114A wild life biologists examines frogs for a genetic trait that may be linked to toxins in the environment. Previous research had estimated that this trait is usually found 1 in every 4 frogs. The biologist decides to collect and examine 180 frogs. Verify that the biologist can use a normalmodel to approximate the distribution of the number of frogs with the trait.B. Yes, because np and nq are both greater than 10. 115A basketball player has made 70% of his foul shots during the season. Assuming the shots are independent, find the probablility that in tonight's game he does the following (8-9):7. The probability that in tonight's game the basketball player misses for the first time on his fourth attempt is..? A. 0.1029, B. 0.0017, C. 0.973, D. 0.2088A. 0.1029 1168. The probability that tonight's game the basketball player makes his first basket on his sixth shot is..? A. 0.1029, B. 0.0017, C. 0.973, D. 0.2088B. 0.0017117(. Hurricanes in a particular place arrive with a mean of 2.25 per year. Suppose the number of hurricanes can be modeled by a "Poisson Distribution" with this mean. What's the probability of no hurricanes next year?A. 0.1054, B. 0.0500, C. 0.188, D. 0.920A. 0.1054 11810. Based on past experience, a bank believes that 7% of the people who recieve loans will not make payments on time. The bank has recently approved 500 loans. What is the probablility that over 9% of these clients will not make timely payments? A. 0.07, B. 0.011, C. 0.034c. 0.034 119It is believed that nearsightedness affects about 15% of all children. A kindergarten has registered161 incoming. (11) Can the CLT be applied to describe the sampling distribution for the sample proportion of children who are nearsighted? Check the conditions and discuss any assumptions you need to make.C. Yes. Assume that these children are typical of the population to satisfy the randomization condition, and teh 10% and success/failure conditions are met. 12012. Sketch the sampling model. Choose from the following:A. 0.066, 0.15, 0.234 12113. How many of the incoming students might the school expect to be nearsighted (hint: they might expect the proportion of nearsightedness to be within 2 SD) A. exactly 24 childran, B. Between 15 and 33 children, C. Between 20 and 29 children, D. Between 11 and 38 childrenD. Between 11 and 38 children 12214. A poll taken this year asked 1006 adults whether they were fans of a particular sport and 36%said they were. Last year, 37% of a similar-size sample had reported being fans of the sport. For 95% confidence explain what that margin of error means.A. We are 95% Confident that this sample proportiona is within +-ME% of the true proportion ofadults who are fans of the sport. 12315. A newspaper article that a poll based on a sample of 1150 residents of a state showed that the state's Governor's job approval rating stood at 58%. They claimed a margin of error of +-3%. What level of confidence were the pollsters using?A. 90%, B. 96%, C. 98%, D. Cannot dtermine from information given.B. 96%12416. We have calculated a confidence interval based on a sample of size n=50. Now we want to get a better estimate with a margin of error that is only one-fourth as large. How large does our new sample need to be?A. 25, B. 50, C. 200, D. 400, E. 800A. 25 125Since many people have trouble programming their DVD players, an electronic company has developed what it hopes will be easier instructions. The goal is to have at least 95% of customerssucceed at being able to program their DVD players. The company tests the new system on 100 people, 92 of whom were successful. 12617. Identify any mistakes in the student's statements of the null and alternative hypotheses. If there are any mistakes, show what the correct