Question

19 4poines)e the following information Cof "v kling (om ,, the average cost of flowers for a wedding İ.soos. Recentiyers was S ww the question. According to the website sample of 4o wecddings in the U.S.e was found that the averase cost of the flowers "ith a standard deviation of $102. On the basis of this. n 95% confidence intervii or in a rand was $73-4, an cot of nowers for a wedding is $701 to $767 the me r thiption, whieh of the following doos not doseribe a condition for a vald coia a) The deseription states that the sample was randomly selected, so we can assume that b) The sample sine of 4o is large enough that knowledge about the population distribution interva/ confidence condition which states that the data must represent a random sample is satisfied that the is not nev essary and the condition that the population be normally distributed or sampie sine be larger than 25 is satistied e) The sample observations are independent because knowledge about the cost of flowers for azy one wwdding tells us nothing about the cost of flowers for any other wedding in the sample ) All of these describe conditions for a valid confidence interval.

Answer 1

ANS: d) All of these describe conditions for a valid confidence interval.

Since the assumptions are

1. Randomization Condition: The data must be sampled randomly.

2. Independence Assumption: The sample values must be independent of each other. This means that the occurrence of one event has no influence on the next event.

3. Sample Size Condition: The sample size must be sufficiently large.