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A random sample of 200 students at UCLA shows that 120 of them have internet access. Test the claim that the true population proportion of students at UCLA who have internet access is more than 55%. Use 3% level of significance. Use the P-Value method.
What is the total amount spent on consumer goods?
Using the given data set, find (a) the sample mean, (b) the sample standard deviation, (c) construct a 98% confidence interval for the population mean μ.
One variable recorded is the count X of finish defects (dimples, ripples, etc) in the car's paint. Is it reasonable to use a binomial distribution?
If 12 of them produce yr owers what is the probability that in the remaining 8 plants 4 produce yw owers, and 3 produce gr owers?
Assuming this is literally true, how can it be explained? What facts and/or statistics would you need to know to expose this misleading claim?
Determine the value of population mean? What is the best evaluate of this value?
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05.
Use relative frequencies to estimate the probability that a seed will germinate, What is your estimate?
The table below lists the number of audience impressions (in hundreds of millions) listening to songs and the corresponding numbers of albums sold (in hundreds of thousands).
Flip a coin 20 times and 5 heads are obtained. Let p denote the probability of getting a head from each flip. Do a conservative test of size 0.06 for H0:p= 0.4
The engineers hoped to base their decision on the reactions of 50 drivers, but time and budget constraints may force them to cut back to 20. How would this affect the power of the test? Explain.
The company if we want to be 95% confident that the sample percentage is within 3% of the actual percentage of the accidents covered by the company?
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