Dany Sanchez gonzalez (29209nbpsnj. net) About
ims completed: 8
Assignment: 6.3 Lesson 15: Finding This Percent of That Practice Problems #4-7
mpleted: 8/11
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Problem ID: PRABFCGF
Problem 6
A shopper needs 24 sandwich rolls. The store sells identical rolls in 2 differently sized packages. They sell a six-pack for $5.28 and
a four-pack for $3.40. Should the shopper buy 4 six-packs or 6 four-packs?
Select one:
4stx-packs
6 four-packs
Explain your reasoning

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.