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Dice. After getting trounced by your little brother in a children s game, you suspect the die he gave you to roll may be unfair. To check, you roll it 60 times, recording the number of times each face appears. Do these results cast doubt on the die s fairness?
a) If the die is fair, how many times would you expect each face to show?b) To see if these results are unusual, will you test goodness-of-fit, homogeneity, or independence?c) State your hypotheses.d) Check the conditions.e) How many degrees of freedom are there?f) Find χ2 and the P-value.g) State your conclusion.
Construct a scatterplot of the relationship between the 2 variables. Plot the regression line on this graph
a study conducted at a certain college shows that 55 of the schools graduates find a job in their chosen field within a
Provide an example and state the Null and the Alternative hypothesis for the example in symbolic form.
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
In a random sample of 5000 infants between the ages of 28 days and 1 year, what is the approximate probability that the number of SIDS-related deaths will be at least 10? Interpret your results and state any assumptions.
Apparently, some of your classmates do not understand Statistics very well because you know several of their conclusions are incorrect. Explain the mistakes in their statements below.
It has been reported that about 35% of U.S. adults attended a sports event during the previous year. What are the odds that a randomly selected U.S. adult attended a sports event during the year?
Let X1, X2, . . . , X80 be a random sample of size n = 80 from a distribution with probability density function f(x) = 6x(1 - x), 0
say a random variable x is drawn uniformly from between 0 and 1. say that y sin2pix. what is the covariance between x
Do you think the actual number in the " ≤ 140" range would equal the expected number in this range? If so, why? If not, why not?
What does the monocentric city model say about the relative level of rents in two cities that are otherwise identical except that one city is located.
If X denotes the number of tractors operating at the end of a year, determine the probability mass and distribution functions of X.
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