What distribution must be used to calculate confidence interval and hypothesis test if the standard deviation of the population is unknown? a) I don't know b) t- distribution c) z- distribution d) Either z or t distribution In the current chapter covering statistical inferences on means, all of the procedures we have discussed (sampling distributions, confidence intervals and statistical tests) have involved two assumptions. What are those two assumptions? a) Simple random sample and both nπ and n(1-π) greater than or equal to 10 b) Simple random sample and normally distributed population or Central Limit Theorem is valid c) Simple random sample and normally distributed population d) Simple random sample e) Simple random sample or Central Limit Theorem is valid
What distribution must be used to calculate confidence interval and hypothesis test if the standard deviation of the population is unknown?
a) I don't know
b) t- distribution
c) z- distribution
d) Either z or t distribution
In the current chapter covering statistical inferences on means, all of the procedures we have discussed (sampling distributions, confidence intervals and statistical tests) have involved two assumptions. What are those two assumptions?
a) Simple random sample and both nπ and n(1-π) greater than or equal to 10
b) Simple random sample and
c) Simple random sample and normally distributed population
d) Simple random sample
e) Simple random sample or Central Limit Theorem is valid
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