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A dreidel is a four-sided top that contains a Hebrew letter on each side: nun, gimmel, heh, shin. Here we suppose that a fair dreidel is to be spun ten times. Compute the probability of each of the following events:
a) five gimmels and five hehs.
b) no nuns or shins.
c) two letters are absent and two letters are present.
d) at least two letters are absent.
in a town 60 of families are known to drive european cars. in a sample of 10 families what is the probability that at
the assembly line that produces satellite radios has historically resulted in a 3 defective rate. a random sample of
A random sample of 52 groups gave a mean of $8.30 with a standard deviation of $2.42. Find a 90% confidence interval for the mean amount left by all groups.
Utility functions need not relate to dollar values. Here is a problem in which we know little about five abstract outcomes. What is important, however, is that a person who does know what A to E represent should be able to compare the outcomes..
Assuming that the process is operating correctly according to specifications, what is the probability that a sample will indicate that an adjustment is needed?
Use x for the number of bats and y for the number of balls made per week. The number of work-hours avaiable for construction and finishing is fixed.
What is the standard deviation of the sampling distribution of p(hat) the proportion of all rolls of the die that show a 1 or a 2? 3.) describe the shape of the sampling distribution of p(hat).
An accounting firm has recently recruited six graduates: three men and three women. Three of the graduates are to be selected at random to work in the firms suburban office. Construct a probability tree.
beechwood specialty electronics has just leased space for a store in the crestview hills towne center that will provide
If a group of 400 school children are selected at random, what is the probability that at most 70 children will miss school because of asthma?
The evidence supports the manufactuer claim at the .05 significance level. Suppose 49 bulbs were tested with the folowing results: x-bar = 827.5 hours, s= 70 hours. Conduct the test using alpha=.05.
Find the minimum sample size needed, using a prior study that found that 36% of the respondents said they have high speed Internet access.
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