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The Der Dachstein mountain in Austria has several hiking trails, lots of options for skiers, and a spectacular sky walk that extends out from a ledge to offer a view of the Alps. A new cable car takes passengers to approximately 2700 meters above sea level in approximately 5.5 minutes.32 A random sample of cable car rides was selected and the time (in minutes) to reach the top was recorded for each. The data are given in the following table.
5.7
6.4
6.1
5.2
8.7
5.4
5.9
4.7
7.1
8.9
6.2
6.8
6.0
4.5
Assume the underlying population is normal and σ = 1.3. Is there any evidence to suggest that the mean cable car time is greater than 5.5 minutes? Use a = 0.05 and compute the p value to draw a conclusion.
Graph these data to see whether a linear equation might describe the relationship between the group's television shows and guitar sales and use the least-squares regression method to derive a forecasting equation.
Explain why you could estimate the probability that 100 people selected at random had worked for their employers an average of 10 years or more, but you could not estimate the probability that an individual had done so.
a 90 confidence interval estimate for a population mean was computed to be 49.3 67.9. determine the mean of the sample
Using the confidence interval method, test the claim that the average age of consumers is at least 30 years ( α= 0.05). Test the same claim by using the test statistics method ( Z or T test).
Revolution is a dynamic process with consequences no one can anticipate. Explain the initial goals of the colonists in 1765 at the time of the Stamp Act and the evolution of their ultimate decision to declare independence in 1776. What were the po..
a manufacturing company wants to investigate the product coming out of two machines has a similar diameter or not. it
A pharmaceutical company has determined that if a new cholesterol-reducing drug is manufactured (introduced to the market) the following probability distribution will describe this drug's contribution to the company profits during the next six mon..
At the 0.01 level of significance, test the claim that the mean is less than 342 km. Should the storage yard be moved? Give your reasons.
1) There are 500 employees in a firm, 45% are female. A sample of 60 employees is selected randomly. a) Determine the standard error of the proportion.
A hypothesis states a difference exists between two populations. Sometimes this is an obvious conclusion because the means will be very different.
a collection of paired data consists of the number of years that students have studied spanish and their scores on a
The sample mean has been calculated as 240.0. Construct and interpret the 90% and 95% confidence intervals for the population mean.
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