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A furniture store is having a sale on sofas and you're going to buy one. The advertisers know that buyers get to the store and that 1 out of 4 buyers change to a more expensive sofa than the one in the sale advertisement. Let X be the cost of the sofa. What is the average cost of a sofa if the advertised sofa is $250 and the more expensive sofa is $ 375?
Construct and interpret a 95% confidence interval for the mean score on this exam question. Follow the Inference Toolbox.
The error between the sample mean and the population mean for a sample of n = 16 is 5 points and the error between a sample mean and population mean for a sample of n = 100 is 2 points. Explain the difference in the standard error for the two samp..
The diameters of oranges in a certain orchard are normally distributed with a mean of 5.26 inches and a standard deviation of 0.500 inches.
Which variable would you use as the explanatory variable and which as the response variable? Why? What would you expect to see in the scatterplot? Discuss the likely direction, form, and strength.
What does it mean to say that a particular value of x has a z-score of -2.1?
If 45 houses are randomly selected, what is the probability that four of the houses will be burglarized? Is this a binomial experiment? Explain how you know.
Which promises the profit of $24,000 with the probability of .7 or a loss (due to bad weather, strikes, and such) of $8000 with the probability of .3. Determine the expected profit?
Suppose you have the experiment of flipping a coin three times.
Based on your experience, what additional information would you recommend to the key decision maker in the simulation to solve the challenge given?
For the normal distribution curve with mean of 19 and a standard deviation of 6, which range of the variable shows an area under the curve corresponding to a probability of approximately 99.7%?
Based on this, what is the probability that the mean weight of the bales in a sample of n=64 bales will be between 78 and 82 pounds?
Determine the area under the standard normal curve that lies: (a) to the left of Z = -2.31 (b) to the right of Z = -1.47 (c) between Z = -2.31 and Z = -1.47 (d) between Z = 1.47 and Z = 2.31
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