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The weights at birth of five randomly chosen baby Orca whales were 425, 454, 380, 405, and 426 pounds. Assume the distribution of weights is normally distributed. Find a 95% confidence interval for the mean weight of all baby Orca whales. Use technology for your calculations. Give the confidence interval in the form " estimate margin of error ± ".
Round to the nearest tenth of a pound.
a. There is not enough information given to calculate the confidence interval.
b. 384.0 68.0 ± pounds
c. 418.0 34.0 ± pounds
d. 418.0 34.5 ± pounds
If a simple random sample of 75 MBA graduates is to be taken. What is the probability that the sample mean salary will exceed $82,500?
Create the indicated confidence interval for population mean using (a) t-distribution. (b) If you had incorrectly used normal distribution, which interval would be wider?
an airplane holds 20 passengers. the probability a passenger will not show up is .1a. if the airline sells 25 tickets
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
Review the Christian year pie chart and write a summary in which you (a) describe the significance of the holy days on the chart.
1. In your own words, describe the meaning of thermal expansion in solid state engineering.
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A quality control inspector wants to determine the percentage of cracked eggs (not broken, just cracked) sold in a store. The inspector checked 3 cartoons (36 eggs) of eggs and found two eggs that were cracked. Determine a 90% confidence interv..
Develop the estimated regression equation that can be used to predict the closing price given the value of Period At the .05 level of significance, test for any positive autocorrelation in the date.
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