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Use the normal approximation to the binomial distribution to determine (to four decimals) the probability of getting 7 heads and 7 tails in 14 flips of a balanced coin. Also refer to the binomial probabilities table of "Statistical Tables" to find the error of this approximation.
The average cost per night of a hotel room in San Francisco is $550 with a standard deviation is $150 based on a sample of 50 hotel room rates. a) Construct a 99% confidence interval estimate on the mean of all hotel room rates.
This problem related to Basic Statistics and it discuss about the examples of qualitative and quantitative methods of data collection
Historical records show that 5 percent of people who visit a particular website purchase something. What is the probability that exactly 2 people out of the next 25 will purchase something? Use the Poisson distribution to estimate this binomial pr..
broke amp down has several hundred machines in its large manufacturing facility as it uses the pwp concept
a manufacturer knows that their items have a normally distributed lifespan with a mean of 3.1 years and standard
Psychological Statistics
Fitting a straight line to set a data yields the ff prediction line Yi=2+5Xi Interpret the meaning of the Y intercept b0.
Use a computer software program to simulate 100 samples of size 25 from a normal distribution with µ = 30 and σ = 5. Test the hypotheses H0: µ ≠ 30 versus Ha: using each of the 100 samples of n = 25 and using a = .05.
Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
suppose the union station in chicago a large train station contains on average 20000 people. assume trains and people
What is the probability of selecting 10 production employee at random on a hot summer day and finding that none of them are absent.
Suppose that Y is normally distributed with mean 0 and unknown variance σ2. Then Y2/σ2 has a χ2distribution with 1 df. Use the pivotal quantity Y2/σ2 to find a a. 95% confidence interval for σ2.
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