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The first class in a relative frequency table is 50-59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?
How many students must we sample if we want to be within 4% of the at DeVry University when using a 95% confidence interval? true proportion of female students
The error made by a ketchup filling machine when filling 12 oz. bottles has mean of .1oz. and a standard deviation of .05oz. what proportion of 12 oz. bottles filled by machine will have more than
Would it be reasonable to conclude that less than 5 percent of the employees are not able to pass the random drug test?
In a survey of 1002 people, 710 said that they voted in a recent presidential election. Voting records show that 61% of eligible voters actually did vote. Given that 61% of eligible voters actually
A sample of 54 day-shift workers showed that the mean number of units produced was 345. A sample of 60 night-shift workers showed that the mean number of units produced was 351. At the .05 significa
A random sample of 100 patients taken at a community hospital shows the mean time for a patient to see a physician is 28 minutes with a standard deviation of 8 minutes.
Suppose you are the coach of a church basketball team and are asked how many ways you can assign positions to your players (that would be five different positions) with a roster of 10 players. How m
What are the basic assumptions made when using time series techniques and causal techniques?
The mean of the population was computed to be 126.9 grams and the standard deviation was 1.20 grams. Which food results in a more uniform weight?
Assume GRE scores form a normal distribution with a population mean of 750 and a population standard deviation of 150. If you take a random sample of n = 8 students, what is the probability that th
D.O. Better, operations manager for Luxury Products, Inc., is forecasting the coming month's (October's) demand for his best-selling product based on the following dataWhat is the forecast for Octob
Suppose that an airplane engine will fall, when in flight, with probability 1-p independently from engine to engine; suppose that the airplane will make a successful flight if at least 50 percent of
Suppose that the average height for college men is 66 inches. If the height distribution is bell-shaped, and 95% of the men have heights between 60 inches and 72 inches, what is the standard deviati
A researcher knows that the population mean among college students taking the Social Conformity Test is a "neutral" 100. (scores higher than 100 are assumed to represent more conformity than average
Assume the likelihood that any flight on Northwest Airlines arrives within 15 minutes of the scheduled time is .90. We select four flights from yesterday for study. a. What is the likelihood all fou
When finding a confidence interval for the true mean spent of ALL citizens, should we use a z-score or a t-score? Why?
Suppose that the average number of years to graduate at a university is 4 years, with a standard deviation of 0.5 years. Assume a bell-shaped distribution for years to graduate.
Can we conclude, at the 0.05 level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from 55 months? Perform a two-tailed test.
If 4% of the population catch a certain disease, find the probability that in a group of 200 people, 3 will get the disease. This approximates a Poisson.
what statistical test should be used to analyze the data? Identify Ho and Ha for this study, conduct the appropriate analysis, and should Ho be rejected? what should the researcher conclude?
What are the limits of the 99% prediction interval of the daily sales in dollars of an individual grocery store that has spent $3000 on advertising expenditures? The distance value for this particul
How would I solve this statistics question. In a gallop pill of 1,038 adults ,540 said that second-hand smoke is very harmful. What percentage of adults who said second-hand smoke is very harmful?
Formulate the preceding problem into linear programming format. Use the seven question and table approach. Work center 2's constraint is:
A sample of 4 axles is inspected each hour for process control purposes, and records are kept of the sample mean diameter. What will be the mean and the standard deviation of the numbers record.