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Find a 95% confidence interval for the proportion of customers who purchase the extended service plan.
Find a 95% confidence interval for the proportion of all customers who would benefit by purchasing the extended service plan.
As part of a study,investigators wanted to assess the accuracy of self reported smoking status. Participants are asked whether they currently smoke or not. In addition, laboratory tests are performed on hair samples to determine presence or absence o..
The mean and standard deviation are found to be 505 hours and 18 hours, respectively. Perform the appropriate test of hypothesis to determine whether the new bulb should be used. Use a 0.01 level of significance.
what is the probability that student from this class will pass not fail?a 0.45b 0.60c 0.72d
Compute the probability of selecting a credit card customer at random and finding the customer charged between $70 and $83 last month.
The time needed to drive from town A to town B is normally distributed with a mean of 180 minutes and standard deviation of 20 minutes. What is the probability that a person will drive from town A to town B
a computer manufacturer is introducing a new product specifically targeted at the home market and wishes to compare the
in a random sample of 5 parts on an assembly line the probability that one of the parts is a defect is 15 and follows a
15 watch between 10 and 15 hrs per week and 10 watch less than 10 hrs per week. Determine whether there is a relationship between education levels and hours spent watching TV.
How many treatment conditions were compared in the study? How many individuals participated in the study?
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
Use the given date to find the minimum sample size required to estimate a population proportion and populat mean. Margin of error: 0.004, confidence level, 90%, sample proportion (p) : = 0.45
Describe one way in which humans have used their knowledge of natural biodegradation processes to reduce waste or clean up environmental damage.
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