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Suppose that you collect data on apartment prices in Tempe. You look at 41 different apartment and find a mean of 757 and a standard devaluation 156.7. Construct a 95% confidence interval for the mean apartment price. That interval is? Please show work.
a negative relationship between an explanatory variable x and a response variable y means that as x increases y
If the total weight of the two bags, X1 + X2 exceeds 105.4 pounds, a surcharge is added onto the shipping cost. What percentage of all shipments can be expected to result in a surcharge being added to the shipping cost?
The mean SAT verbal score is 478, with a standard deviation of 98. Use the Empirical Rule to determine what percent of the scores lie between 380 and 478. (Assume the data set has a bell-shaped distribution)
State in each of given cases whether you would expect relationship between given variables to be positive or negative or neither.
In a random sample of 53 concrete specimens, the average porosity (in percent) was 21.6 and the standard deviation was 3.2. a) Find a 90% confidence interval for the mean porosity of specimens of this type of concrete.
What is the probability a random sample of 90 test takers will provide a sample mean test score within 10 points of the population mean of 502 on the critical reading part of the test?
In 2012, The American Journal of Clinical Nutrition reported that 31% of Australian adults over age 25 have a Vitamin D deficiency. The data came from AusDiab study of 11218 Australians. do these data meet the assumptions necessary for inference?
If P = 6 kN, x = 0.75 m and y = 1, determine the tension developed in cables AB, CD, and EF. Neglect the weight of the plate. 5-66. Determine the location x and y of the point of application of force P so that the tension developed in cables AB,..
assuming a line of regression of y 2.1 0.8x between temperatures and production yield. if the average temperature is
A confidence interval estimate for the population mean is given to be (40.45, 49.24). If the standard deviation is 11.159 and the sample size is 35, answer each of the following (show all work):
A pie chart shows the market shares of cola products. The "slice" for Pepsi-Cola has a central angle of 90 degrees. What is its market share?
Assume that the mean parameter θ for the RV L is unknown. To estimate it, a random sample of n = 10 light bulbs is selected, and the lifetime of each light bulb is measured. Let X denote the number of those 10 sampled light bulbs that burn longer ..
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