Situation 1 In a 1998 advertising campaign, Nabisco claimed that every 18-oz bag
ID: 3176965 • Letter: S
Question
Situation 1
In a 1998 advertising campaign, Nabisco claimed that every 18-oz bag of Chips Ahoy! Cookies contained at least 1000 chocolate chips. Two researchers tried to verify this claim. The data includes..
What type of sampling, if any, was used in this study?
Please describe any sources of bias for this situation.
What is the explanatory variable for this study?
Does this data come from a normal distribution? Please include a chart title, and axis labels and describe any statistical tests that were completed to this result.
What is the mean and standard deviation from this sample?
What is the probability that a randomly selected bag of Chips Ahoy! has less than 1000 chocolate chips?
What is your final result from this data? What conclusions can be made based on the initial research question?
Situation 2
You work for a theme park, and your boss asks you to dig into the wait time of their largest roller coaster, “The Demon Roller Coaster”. You randomly select 20 people each day, for 5 days, by asking every 20th person exiting the park starting with the 35th person. The data includes...
What type of sampling, if any, was used for this study?
What is the explanatory variable for this study?
Draw a Scatter Plot for this situation, and please include a chart title, and axis labels.
Does this data come from a normal distribution? Please include a chart title, and axis labels and describe any statistical tests that were completed to this result.
What is the mean and standard deviation from this sample?
What is your final result from this data? What conclusions can be made based on this data?
Chips per Bag 1087 1185 1239 1307 1135 1214 1270 1377 1098 1191 1244 1325 1137 1215 1279 1402 1103 1199 1247 1345 1143 1219 1293 1419 1121 1200 1258 1356 1154 1219 1294 1440 1132 1213 1269 1363 1166 1228 1295 1514Explanation / Answer
(1)
What is the mean and standard deviation from this sample?
Mean=1247.375
Standard deviation=100.9602
What is the probability that a randomly selected bag of Chips Ahoy! has less than 1000 chocolate chips?
Ans:P(X<1000)=1000-1247.375/100.9602
=-2.4502
P(Z<-2.4502)=0.0071
Chips per Bag 1087 1185 1239 1307 1135 1214 1270 1377 1098 1191 1244 1325 1137 1215 1279 1402 1103 1199 1247 1345 1143 1219 1293 1419 1121 1200 1258 1356 1154 1219 1294 1440 1132 1213 1269 1363 1166 1228 1295 1514