Suppose the amount of orange juice consumed (in grams per day) by an american has some distribution whose population standard deviation is known to be 96.0 grams. a random sample of 243 americans was taken by an orange growers association, and they found that, for the sample, the average amount of orange juice consumed per day was 133.0 grams.
a. construct an 80% confidence interval for µ, the true mean amount of orange juice consumed in the us per day, and interpret the interval.

The fraction of defective integrated circuits produced in a photolithography process is being studied. a random sample of 300 circuits is tested, revealing 17 defectives. (a) calculate a 95% two-sided confidence interval on the fraction of defective circuits produced by this particular tool. round the answers to 4 decimal places. less-than-or-equal-to p less-than-or-equal-to (b) calculate a 95% upper confidence bound on the fraction of defective circuits. round the answer to 4 decimal places. p less-than-or-equal-to

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Could someone me with this question i’ve been stuck on it for 20 minutes