A random sample of 10 candy store franchises had a mean startup cost $106.90 thousand and s = $29.40 thousand. Find a 90% confidence interval for the population average startup cost u for candy store franchises. Assume that x has a distribution that is approximately normal. Write the data and based on it, decide what distribution you will use. 9) of a) | Data: Distribution: b) c) d) Use the appropriate formula to find the maximal error E ) Write the confidence interval ) Interpret your results

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A: x y 160 430 170 480 130 340 130 370 80 250 190 520

Q: P(−1.37<z<1.68)=

A: standard normal distribution Z~N(0,1) P(−1.37&lt;z&lt;1.68) = ?

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A: p^=0.56n=1507

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A:

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