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The owner of a local nightclub wishes to perform a statistical analysis to determine whether the mean age of her customers isover 30. What are appropriate null and alternative hypotheses?
on average 9 babies are born per 24-hour day at a hospital in indianapolis.a what is the probability that at least one
What is Excel formula in B9 giving first value of coefficient in the objective function?
suppose the counts recorded by a geiger counter follow a poisson process with an average of two counts per minute.a
In a random sample of 500 families owning sets in the town was found that 340 subscribed to ASTRO. Find a 95% confidence interval for actual proportion of families in this town who subscribe to ASTRO.
a) Calculate the 90% confidence interval on the estimated sample mean. b) Calculate the 99% confidence interval. Why is this interval larger? c) Explain why this confidence interval would shrink if your sample size was 100 (there are two reasons).
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
If the safety commission determines that an elevator design is safe if its operating load is exceeded less than 0.05% of the time, does this prototype meet these saftey guidelines?
What percentage of the averages or medians of the sample will be greater than 140 seconds?
Describe multiple regression analysis and discuss potential uses for this model
You're given that the forecast for the current period of 70 turned out to be 6 units less than the actual demand. The forecast for the next period is 75.8.
let 18 and 10 be the standard deviations of the independent random variables x and y respectively.what is the standard
a track star runs two races on a certain day. the probability that he wins the first race is 0.7 the probability that
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