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An instructor gives his class a set of 13 problems with the information that the next quiz will consist of a random selection of 3 of them. If a student has figured out how to do 9 of the problems, what is the probability the he or she will answer correctly
(a) all 3 problems?
(b) at least 2 problems?
acording to the national association of realtors 44 of u.s. homes sold in march 2010 wre purchased by first time home
Using the six-step critical value approach, at the 0.05 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 25 minutes?
a sample of 36 patients in a doctors office showed that they had to wait an average of 45 minutes with a standard
In a school how is ztest used in time table ... one group that studies 7 periods a day of 45 mins each class and the other group can choose semester wise classes and their time period is 90 mins
a candy company distributes boxes of chocolates with a mixture of creams toffees and cordials. suppose that the weight
Develop a test of hypothesis to determine if the mean time spent in the mall is more than 0.75 hours. Use the .05 significance level.
the sales of a grocery store had an average of 8000 per day. the store introduced several advertising campaigns in
Has there been a significant decrease in the proportion of students who change their major after the first year in this program? Test at the .05 level of significance.
Find the 90% confidence interval for the variance and standard deviation of the ages of seniors at oak park college if a sample if 24 students has a standard deviation of 2.3 years.
In teaching the role of statistical application in Health Science, the importance of reliable and valid data is very critical in research process.
1 due to normality the formula for computing z is the same for a single data value as it is for an average of the data
particular cookie will have fewer than 5. What type of probability distribution will most likely be used to analyze the number of chocolate chips per cookie?
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