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Question: A mail-order firm was considering a new software package that provided information on products (availability, history, cost, and so forth). To test the software, the next 17 new employees were randomly assigned to use the old or the new software. After training, each employee completed a search report on 40 products. Analyze the data, which are in minutes, and write a conclusion about the new software package.
New package Old package
4.3 6.3
4.7 5.8
6.4 7.2
5.2 8.1
3.9 6.3
5.8 7.5
5.2 6.0
5.5 5.6
4.9
a standard 52-card deck is shuffled and 5 cards are picked without replacement from the top of the deck. the
The data from the drive quality tests conducted at DataStor over the past 150 shifts are contained in the file DATASTOR. The Data Description section contains a description of this data file.1.
determine the number of ways to distribute 10 identical apples 1 mango and 1 pear to 4 hungry students so that each
A simple random sample of 400 trees is selected, and the sample mean age of these trees is computed. We know the random variable has an approximately normal distribution because of?
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
The spreadsheet estimates the cost of producing 10,000 to 200,000 chips per year, as seen in the table. Develop a regression model to predict Costs based on the Level of production.
1. a researcher is interested in the relationship between fathers performance in high school and their childrens social
Determine for each variable if it is the explanatory variable, the response variable, or whether it could be both.
A silver dollar is flipped 100times, with the following results: Heads =57, tails=43. What test should be used to determine if this is a fair coin?
Twins. There is some indication in medical literature that doctors may have become more aggressive in inducing labor or doing preterm cesarean sections.
Assuming that they choose seats randomly, construct an approx, imate distribution for the number of pairs that sit next to each other. How many of these pairs would you expect to be sitting across from each other?
suppose the reaction time in seconds to certain stimulus is a continuous random variable x with cumulative distribution
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