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Question: Technology and the Internet According to a report from Microsoft, 24% of PCs worldwide are not adequately protected by antivirus software. Suppose 200 PCs from around the world are selected at random.
a. Find the distribution of the sample proportion of PCs that are not adequately protected.
b. Find the probability that the sample proportion is less than 0.20.
c. Find the probability that the sample proportion is more than 0.29.
d. Find a value v such that the probability the sample proportion is less than v is 0.01.
the mean diameter of a ball bearing produced by a certain manufacturer is 0.80 cm with a standard deviation of 0.03 cm.
What is the verbal SAT score such that only 16% of admitted students had a higher score?
Why are researchers often interested in the proportion of total variance that is systematic variance?- What would the proportion of total variance that is systematic variance indicate if it were .25?
On May 23, 2013, Gallup reported that of the 1,005 people surveyed, 76% of U.S. workers believe that they will continue working past retirement age. The confidence level for this study was reported at 95% with a 3% margin of error. a. Determine th..
In this context, what is a Type I error?- In this context, what is a Type II error?- Which type of error would the factory owner consider more serious?
Getting data and making calculations can be the easy part. Understanding the real issues and asking the right questions can be more difficult. Reporting average travel time or the variability in competitors' price can be a computational exercise.
a warped coin has probability of 0.5 of landing heads probability of 0.3 of landing tails and probability 0.2 of
Combining relationships. Suppose that x1 =2x2- 4 so that x1 and x2 are positively correlated. Let y =3x2 + 4 so that y and x2 are positively correlated.
shelias measured glucose level one hour after a sugary drink varies according to the normal distribution with ? 134
Find the mean number of days until the total cholesterol level is safe (less than 200 mg/dL).- Find the probability that the total cholesterol level will be safe in a number of days within two standard deviations of the mean.
State the Null Hypothesis and the Alternative Hypothesis
The police that patrol a heavily traveled highway claim that the average driver exceeds the 65 miles per hour speed limit by more than 10 miles per hour.
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