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uppose the length of movies expressed in minutes are normally distributed. Four movies are randomly selected. Their lenghts were 110, 96, 125, and 136 minutes. Find a 95% confidence interval of the average of the lenghs of the movie.
A least squares linear trend line is just a simple regression line with the independent variable being time (months or years for example).
Use the normal approximation to the binomial distribution and part (b) to answer the following question: What is the probability that a seat will be available for every person who shows up holding a reservation?
In a random sample of 400 employees of a local company, 180 were female. At 95% confidence using the critical value approach, determine if the proportion of females in the company is significantly less than 50%.
Determine the probability that particular call lasted between 110 and 180 seconds?
Explain the differences between longitudinal and cross sectional business research studies. Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
Which of the following conditions must be met to conduct a test for the difference in two sample means? Suppose we test the difference between two proportions at the 0.05 level of significance. If the computed z is -1.07, what is our decision?
Determine the mean for list of numbers. 6, 5, 9, 4, 14, 9 (Round to the nearest tenth)
The hypothesis test produces a z-score of z = 2.37. Assuming that the researcher is using a two-tailed test, what decision should be made?
the U.S. economic system will be able to rebound following the recession of 2009-2010. Create a scale of each of the following types:Constant-sum scale and Likert-type summated scale.
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
Identify a research issue, opportunity, or problem that uses data that has absolute zero measurements. Some examples include a team member's stock portfolios performance
A standard deviation of 1.00 degrees C. Find the probability that a randomly selected thermostat reads greater than -0.74 and draw a sketch of the region.
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