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It was found that 64 lasted more than 1000 hours. Find the point estimate for the population proportion, the margin of error for a 95% confidence and then construct to the 95% confidence interval fo
If one runner is selected at random, what is the probability that this runner will complete this road race in less than 231.58 minutes?
What is the probability that the average amount of paid time lost during a three-month period for the 120 blue-collar workers will exceed 1.5 days?
The GRE test in 2010 was 1000 with a standard deviation of 230. if you select a random sample of 75 students, what is the probabbility that the mean score is below 950?
You conduct 8 Bernoulli trials for which the probability of success is 0.85. What is the probability that you will obtain exactly two successes? Round your answer correct to two decimal places
What is considered a medium effect size for a t test for dependent means?
Determine if the sample result indicates that the population variance is decreased from historical value of 0.35. At alpha = 1%, give values for test and critical statistics.
A study conducted by the nationally known Taurus Health Club revealed that 30 percent of its new members are significantly overweight. A membership drive in a metropolitan area resulted in 500 new m
shawn has a gross monthly salary of 4200. he has a 325 car loan payment and a 230 student loan payment due each month. he also has two credit card loan payments each month, one of 187 and the other
How do you know when to use the t-distribution or when to use the z-distribution? If you have a large sample size, use the t-distribution, if the sample size is small, use the z-distribution
Six vitamin and three sugar tablets identical in appearance are in a box. One tablet is taken at random and given to Person A. A tablet is then selected and given to Person B. What is the probabilit
Anyone slower than this cut-off time is definitely not hired. What proportion of the candidates will be hired automatically?
If the company wishes to satisfy the gasoline demand with a minimum monthly operating expense, how many models of each truck should be purchased?
A real estate agent in the coastal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean. A sample of 21 oceanf
Construct a confidence interval for the proportion of adults who approve of the candidate. The confidence interval for the proportion of adults who approve of the candidate is?
According to the chart on page 1-4, the corresponding p-value = 0.0066, which is much less than = .05, suggesting that the combined sample evidence tends to refute the hypothesis that the coin is fa
Calculate the profit earned/loss incurred on; a high performance tire that exceeds 40,000 miles, a high performance tire that does not exceed 40,000 miles, an all weather tire that exceeds 40,000 mi
Somehow, our brain is capable of combining all the existing information to give a better segmentation than either the intensity based or the motion based segmentation. How does the brain combine the
If the sample mean is 9.8 points and the sample standard deviation is 0.15 points, find the 98% confidence interval of the true mean.
mean 47,500 miles standard deviation 3000 miles. Manufacturer willing to replace no more than 20% of tires, what is approximate number of miles for a warranty?
Is there clear evidence of any difference in electrical response to light flash between uninfected and infected rat eyes (at any stage of the disease)? Explain carefully. Is there clear evidence th
For how many of the 100 days was the number of paying customers within three standard deviations of the mean? Explain how you determined your answer.
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district con
Three are selected, at random, without replacement from the batch. What is the probability that the third is not defective given that one of the previous two are defective?
The fill volume of cans produced by a certain machine is normally distributed with mean 12 oz and standard deviation .03 oz.