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One of four different prizes was randomly put into each box of a cereal. If a family decided to buy this cereal until it obtained at least one of each of the four different prizes, what is the expec
In a small pond there are 50 fish, 10 of which have been tagged. If a fisherman's catch consists of 7 fish, selected at random and without replacement, what is the probability exactly two tagged fis
The mean number of bacteria colonies of a certain type in samples of polluted water is 2 per cubic centimeter (cm3).
Assume normal distribution and a 5% level of significance do a hypothesis test and calculate if the standard deviation is different between the years.
If infants really do not show any preference for either type of toy, what is the probability 14 or more of the infants would have chosen the helper toy? What does this suggest about infants making t
Six applications for admission to a local university are checked, and it is determined whether each applicant is male or female. How many sample points exist in the above experiment?
A traditional (not Agresti-Coull's) two-sided confidence interval for the proportion of people. The resulting interval is (0.35 0.45). How many people in the sample supported Mr. Green?
What is the estimated standard error for a sample of n = 4 scores with a variance of s2 = 36? the square root of (36/3).
On a period of three hours, find the probability that more than 6 messages will be sent. please use poisson distribution.
Given a level of confidence of 95% and a population standard deviation of 9, answer the following What other information is necessary to find the sample size (n).
Include the results of your power analysis in a word document. Submit these results along with a brief paragraph, approximately 250 words, stating the role of a power analysis in your dissertation,
The waiting time at a certain bank is approximately normally distributed with a mean of 3.7 min and a standard deviation of 1.4 min. Find the probability that a randomly selected customer has to
State the null and alternative hypotheses to be tested. Determine the rejection region at the 5% significance level. Compute the value of the test statistics.
The useful life has a mean of 600 hours and a standard deviation of 40 hours. Determine the probability that a tube chosen at random will last between 620 and 680 hours.
Why do we not always use the median? Why is the mode not a very good measure for quantitative data?
What is the probability that on 10 True of False questions, 4 will be correct and 6 incorrect out of plain guess?
Successful completion of A will return $3000 (over cost), while successful completion of B will return $5000 (over cost). Prepare a report, with the aid of a decision tree, advising the investor of
Using the ratio-to-moving-average method, determine the quarterly seasonal indices.
A random sample of 32 RN's is selected from this population. Assume that Standard Deviation is 1700. What is the probability that the mean annual salary is between $58,000 and $64,000?
Assuming equal variances, establish, at the 5% level of significance, whether there is a statistically significant difference in the mean weekly sales for the two display locations.
i) If a new bond is to be issued by a city, what is the probability that it will receives an A rating? ii) What proportion of municipal bonds is issued by suburbs?
A report states that 57% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 95% confi
Using seven classes of equal width organize the above data as a less-than cumulative frequency distribution.
A sample of 8 jars has a mean of 15.6 ounces and a standard deviation of 0.3 ounce. Is there enough evidence to support the consumer's conjecture at a = 0.05?"
The number of vehicles arriving at a toll booth, per minute, were observed as. Perform a chi square test to determine the validity of the poisson distribution at the 1% significance level.