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find a 95 confidence interval for the proportion of customers who will purchase at least one item and pay at least 500
comfy wonders whether the customers who receive larger discounts are buying more expensive itemsrecalling that the
create a histogram of the time until first failure for this type of disc playerthen find a 95 confidence interval for
find a 95 confidence interval for the proportion of customers who purchase the extended service planfind a 95
find a 95 confidence interval for niyakis mean net warranty cost per unit sold net of the 50 paid for the plan for
under what conditions if any is it not correct to assume that the sampling distribution of the sample mean is
when if ever is it appropriate to use the standard normal distribution as a substitute for the t distribution with n -
assuming that all else remains constant the length of a confidence interval for a population mean increases whenever
assuming that all else remains constant what happens to the length of a 95 confidence interval for a population
the probability is 099 that a 99 confidence interval contains the true value of the relevant population parameter is
suppose you have a list of salaries of all professional athletes in a given sport in a given yearfor example you might
we know that iqs are normally distributed with a mean of 100 and standard deviation of 15suppose you want to verify
find a 95 confidence interval for the difference between the mean amount of the highest cost item purchased for the
find a 95 confidence interval for the difference between the following two proportionsthe proportion of female
find a 95 confidence interval for the mean amount of all rebcos bills do the same for each customer size
find a 95 confidence interval for the proportion of all large customers who pay bills of at least 1000 at least 15 days
find a 95 confidence interval for the proportion of all bills paid within 15 daysfind a 95 confidence interval for the
suppose a bill is considered late if it is paid after 20 daysin this case its lateness is the number of days over 20
suppose rebco can earn interest at the rate of 0011 daily on excess cash the company realizes that it could earn extra
a company employs two shifts of workers each shift produces a type of gasket where the thickness is the critical
elected officials in a california city are preparing the annual budget for their community they would like to estimate
determine whether more people prefer coke or pepsi assume that roughly half the population prefers coke and half
you are trying to estimate the average amount a family spends on food during a year in the past the standard deviation
specifically suppose each observation has a 65 chance of coming from a normal distribution with mean 100 and standard
suppose you are gambling on a roulette wheeleach time the wheel is spun the result is one of the outcomes 0 1 and so on