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A fast-food chain wishes to investigate the after cooking weight of their "Quarter-Pound" hamburger. The variation in the size of the hamburger patties is known to give a standard deviation of 0.015 pounds. However the machine that presses the patties may be improperly calibrated and produce patties that are systematically too large or too small. The company hires an independent laboratory to purchase 100 hamburgers at random times and independently weigh them using a procedure that is practically free of bias. The average of these weights is 0.245 pounds. Could the true average after-cooking weight of all of the "Quarter-Pound" hamburgers produced by this pressing machine still be 0.25 pounds, or is this strong evidence that the pressing machine is improperly set and the true average is not 0.25 pounds? Translate this into a statistical hypothesis-testing problem and carry out the test. Be sure to give the null and alternative hypotheses, the value of the test statistic, the p-value, and your conclusions.
The grain triticale is a hybrid plant with 2-haploid sets of chromosomes. Suppose if triticale is chemically induced to become tetraploid and Create a hypothesis contain the highest biodiversity
Does empirical scholarly evidence suggest a quantitative or a qualitative difference in language capacity between humans and non-human primates?
Using the case scenario above, provide an assessment of the current business. Describe the company in terms of size, type of business, etc. Explain why you think an HRIS is needed.
A Consultant is to lay oil pipeline running east to west through the oil field of n wells. From each well spur pipeline is to be connected directly to main pipeline along shortest path.
What maximum variance of the raw score population could you have and still be able to reject the null hypothesis of μ = 20 (α = .05), if the sample size is 100 and the sample mean is 22?
Assuming that the current turnover and profits of both the units are comparable, compare the relative benefits and limitations of Materials Requirement Planning (MRP) for these two businesses.
In order to perform a fluorescence experiment, you need to seed a 4-well chamber slide with 60,000 cells in each well. To prepare for the cell count, you transferred twenty uL of cell suspension into thirty uL of trypan blue.
Discuss major challenges that typically users face in building and/or using information systems
Determine a current event or contemporary social issue that you are interested in analyzing using the critical thinking method. Your issue must be broad enough to sustain deep philosophical analysis
1) There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. a) Determine the standard error of the proportion.
a. What is the probability of a type I error? b. Give the formula for the test statistic.
Let x = number of the ball obtained on any selection. Then the probability distribution for x is given by:
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
Which distribution should be used to create 80% confidence interval?
Conduct a statistical test to determine if the sample is representative of the population.
Determine the Midrange. Determine the Standard Variance. Determine the Standard Deviation
In comparing two variances below, determine test value and what are degrees of freedom that must be used?
The population of lengths of aluminium coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.20 inches. A sample of four metal sheets is randomly selected from a batch. What is the possibility that t..
Drug sniffing dogs must be 95% accurate. A new dog is being tested and is right in 46 of 50 trials. Find a 95% confidence interval for the proportion of times the dog will be correct.
Using one proportion z test to find whether or not to support the claim - There is little evidence to reject H 0 , therefore they conclude the tvs are 20 pounds on average.
For which of given variables must a "two tail" t-test be applied?
The owner was interested in the mean time required to service this model, and decided not to carry the model if the mean repair time appeared to be more than 40 minutes.
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