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The percentage of U.S household that have online connection is 78% in a random sample of 420 households what is the probability that fewer than 315 have online connection?
It is correct to say that the standard error of the mean is also the standard deviation of a sampling distribution of means.
Make a stem-and-leaf display of these gas prices. Use split stems; for example, use two 2.2 stems, one for prices between $2.20 and $2.24, the other for prices from $2.25 to $2.29.
What is the 99% confidence interval, if the population standard deviation is known to be 10 days? What is the 99% confidence interval, if the sample standard deviation is 10 days?
The levees were built over 50 years ago and many of them are showing signs of structural distress. Using a systems perspective, how would you draw up a program to rehabilitate the levee system under budgetary constraints over a 5-year period?
What does the large difference between the mean and median tell you about this data set?
The number of arrivals per minute at a bank located in the central business district of a large city was recorded over a period of 200 minutes, with the following results:
A geologist collects hand-specimen sized pieces of limestone from a particular area. A qualitative assessment of both texture and color is made with the following results. Is there evidence of association between color and texture for these limest..
Explain how DNA fragments can be separated. Name a practical application for visualizing separated DNA fragments
Consider a group of 10 life insurance policies, seven of which are on male lives and three of which are on female lives. Three of the 10 policies are chosen at random (one after the other, without replacement). Find the probability that the three ..
a. What is the sample proportion, p 5 proportion of contacts that resulted in a sale being made? b. For simple random samples of this size, what is the probability that p # 0.10?
(a) What is the average number of machines not in use? (b) What proportion of time is each machine in use?
The sales department at Northface would like to determine the proportion of customers who spend more than $1000 per winter season in their stores.
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