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Suppose we are observing a process such that the time between occurrences is exponentially distributed with λ = 1/30 (i.e., the average time between occurrences is 30 minutes). Suppose that the process starts at a certain time and we start observing the process 3 hours later. Write a program to simulate this process. Let T denote the length of time that we have to wait, after we start our observation, for an occurrence. Have your program keep track of T . What is an estimate for the average value of T ?
The researcher then records the level of activity for each child during a 30 minute session on the playground. Is this an experimental or a correlation study? Explain your answer.
a student takes a 20-question multiple choice exam and guesses on each question. each question has 4 choices only one
A researcher believes that younger people use more drugs than older ones. He samples 50 teens and 50 people in their thirties measuring the number of times subjects had used marijuana or cocaine in the past three months.
Machine which fills quart milk cartons is set up to average 32.2 oz per carton, with standard deviation of 1.2 oz. Determine probability that filled carton will contain less than 32 oz of milk?
If the supermarket begins each morning with a stock of 61 cartons of eggs, approximately what percentage of days will there be a surplus of eggs?
Explain briefly why ANOVA was the appropriate analysis for these data and finish the ANOVA table giving the F-statistic, degrees of freedom, and approximating the p-value. Show your work. What is your conclusion about the flavor quality of the differ..
a carnival game is supposed to result in a win 30 of the time. the wheel is checked each month. this month the wheel is
the following frequency distribution presents a set of exam scores for a class of n 20 students. what is the
one piece of pvc is to be inserted inside another piece. the length of the first piece is normally distributed with a
What is the value of the sample mean resonance frequency? The confidence level for one of these intervals is 90% and for the other it is 99%. Which is which, and how can you tell?
A study was completed that examined the relationship between coffee consumption and level of stress for a group of 50 undergraduate students. The correlation was .373, and it was a two-tailed test, done at the .01 level of significance.
zip codes are arranged from east to west. eastern states such as maine have zip codes beginning with 0 running
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