11.500 Samples are processed by frequency analysis (DFT), how many frequencies are expected
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A: Hypotheses: H0: μ1=μ2=μ3H1: At least one μ is different
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Q: The valid use of chi-square also requires that expected frequencies not be too small. Explain.
A: Introduction The χ2 test is a non-parametric test.
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A: Standard deviation: σ=xi-x2n
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Q: help with expected frequencies please!!
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Q: , use the 68-95-99.7 Rule to sketch the sampling model for the sample means.
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A: DATA 122 135 113 122 123 121 124 123 117 139 129 132 127 115 134 125…
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Q: Can you show me a step explanation on how to find the standard deviation for a sample proportion…
A: As per central limit theorem the formula for standard deviation for a sample proportion is,
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A: MEDIAN IS THE VALUE OF (n+1)/2th observation.
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Q: What is the function to got variance sigma 40?
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Q: how do yuo calcaulate a percentile with a z score of -1.61538
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- what is the tird quartileSamples are drawn from a population with mean 144 and standard deviation 43. Each sample has 12 randomly and independently chosen elements. Find the mean, uz, of the distribution of sample means.When dragons on planet Dathomir lay eggs, the eggs are either green or yellow. The biologists have observed over the years that 19% of the eggs are yellow, and the rest green. Next spring, the lead scientist has permission to randomly select 57 of the dragon eggs to incubate. Consider all the possible samples of 57 dragon eggs. What is the mean (μ) number of yellow eggs in samples of 57 eggs?(Please show your answer to 1 decimal place) What is the standard deviation (σ) in the number of yellow eggs in samples of size 57? (Please show your answer to 1 decimal place)
- You take an SRS of size 64 from a population with mean 82 and standard deviation of 24. According to the Central Limit Theorem, what is the approximate sampling distribution of the sample mean? Use the 95 parts of the 68-95-99.7 rule to describe the variability of Xbar.Assume that the weights of trout in a river are normally distributed. You randomly catch and weigh 20 such trout. The mean weight from your sample is 7.3 lb with a standard deviation of 0.9 lb. Test the claim that the mean weight of trout in this river is greater than 7 lb at a significance level of 0.01. Be sure to clearly identify your work, using appropriate notation at each step of the process, and summarize your final result in a complete sentence.2) The average life of a special rechargeable battery for a Calculator that performs 45 functions is 700 hours, with A standard deviation of 37 hours. A sample of 50 batteries is randomly selected, what percentage of the batteries will last more then 705 hours?
- Illustrate Exact Sampling Distributions When the Errors Are Normally Distributed?What is Cumulative Frequency Distribution?A cell phone manufacturer has hired you to estimate the population mean of the battery lifetimes for all phones of their latest model. You decide to measure battery lifetime by recording the time it takes for the battery charge to run out while a tester is streaming videos on the phones continuously. Then you select a random sample of 45 cell phones of the manufacturer's latest model and record their battery lifetimes. Assume that the population standard deviation of the battery lifetimes for that cell phone model (using your method of measurement) is 2.42 hours. Based on your sample, follow the steps below to construct a 95% confidence interval for the population mean of the battery lifetimes for all phones of the manufacturer's latest model. (If necessary, consult a list of formulas.) (a) Click on "Take Sample" to see the results from your random sample of 45 phones of the manufacturer's latest model. Take Sample Sample size: 0 Number of phones Point estimate: 0 45 Sample mean…
