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A national trend predicts that women will account for half of all business travelers in the next 3 years. To attract these women business travelers, hotels are providing more amenities that women particularly like. A recent survey of American hotels found that 70% offer hairdryers in the bathrooms. Consider a random and independent sample of 20 hotels. Find the probability all of the hotels in the sample offered hairdryers in the bathrooms (Do not use the Central Limit Theorem (CLT).)
To test whether two polulations are equal - Since the p value is lesser than 0.05 we reject the null hypotheses
Using Chi-square table finding the P-value and interpret the result
Random samples of five were selected from each of three populations. The sum of squares total was 100. The sum of squares due to the treatments was 40.
A production manager randomly sampled production lines at a factory that produces automobiles. She wanted to find out how many production lines
Many comforters contain both white feathers and down in order to provide a warm, soft cover. A bed-and-bath company would like to expand
What does the accompanying scatterplot suggest about the shape of the distribution for hours studied per week? What does it suggest about the shape of the distribution for monthly cell phone bill?
How might physical activity play a role as a third variable? Discuss its possible relation to both bone density and cola consumption.
The experiment data in below table was to evaluate the effects of three variables on invoice errors for a company. Invoice errors had been a major contributor to lengthening the time that customers took to pay their invoices and increasing the acc..
The university data center has two main computers. The center wants to examine whether computer 1 is receiving tasks that require processing times comparable to those of computer 2.
Find a 95% confidence interval estimate of the percentage of American adults who favored the legalization of marijuana at the time of the poll.
Calculate a 95% confidence interval for the mean endowment of all the private colleges in the United States assuming a normal distribution for the endowments.
Take it as a fact that the probability that the baby will be injured in the car is very much higher than the probability of any harm occurring at home.
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