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Let* is similar to let, except that the bindings of the let variables are performed sequentially from left to right, and each binding is made in an environment in which all of the preceding bindings are visible. For example
returns 39. Explain how a let* expression can be rewritten as a set of nested let expressions, and write a procedure let*->nested-lets that performs this transformation. If we have already implemented let (exercise 4.6) and we want to extend the evaluator to handle let*, is it sufficient to add a clause t eval whose action is (eval (let*->nested-lets exp) env)or must we explicitly expand let* in terms of non-derived expressions?exercise 4.6Let expressions are derived expressions, because
Implement a syntactic transformation let->combination that reduces evaluating let expressions to evaluating combinations of the type shown above, and add the appropriate clause to eval to handle let expressions
Many newspapers, when reporting results of political polls, say that 'with 95% confidence, the results are in error by no more than ±3 percentage points'.
Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals).
1.a college basketball player makes 80 of his free throws. at the beginning of a game he misses his first two free
Consider the following time series.t 1 2 3 4 5 6 7Yt 120 110 100 96 94 92 88a. Construct a time series plot. What type of pattern exists in the data
mark gershon owner of a musical instrument distributorship thinks that demand for guitars may be related to the number
question in a study investigating freshman weight gain the researchers also looked at gender differences in weight
A normal tomato will gain an average of 2 ounces per week during the growing season. A sample of 100 tomatoes is given a special hormone to increase their growth.
a machine that cuts corks for wine bottles operates in such a way that the distribution of the diameter of the corks
Assume the wages are normally distributed with a standard deviation of $0.45. If a worker at this car wash is selected at random, what is the probability that the worker earns more than $6.75?
A sample of n people is taken to obtain their opinion. The proportion p¯ in favor in the sample is taken as an estimate of p. Using the Central Limit Theorem, determine how large a sample will ensure that the estimate will, with probability .95, b..
If the sample consists of n = 15 individuals, then compute df value for the t statistic?
It is the last play of the game and the famous coach's team is on offense. If it makes 5 yards or more, it wins; if not, it loses. Both sides choose Nash equilibrium strategies.
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