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A sample of workers found that 120 out of 200 preferred flexi-time scheduling over work at home options. In the past management has found 70% of workers preferred the flex option.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha.
b) Explain to management what your findings are and what this suggests about future decisions vs work options.
A game involving a pair of dice pays you 3 with probability 17/36, costs you 2 with probability 14/36, and costs you 4 with probability 5/36. What is your probability of losing money in one play of the game?
Create a 95% confidence interval for true mean debt for student borrowers.
Computing the probability values using normal distribution - what proportion of licensed drivers are less than 30 years old?
Is it reasonable for the manufacturer to claim that the drill bits will last 2.5 hours?
Using the data file below, construct a histogram and a frequency polygon. Describe the shape of this distribution.
Which test should we use to determine whether the difference between Mesa and Tempe is statistically significant? Why? Should it be one or two-tailed?
Computing the probability values using normal distribution - what proportion have SAT scores greater than 550?
Q2 is dummy variable equal to 1 in second quarter and 0 otherwise; and Q3 is final dummy variable equal to 1 in third quarter and 0 otherwise. Determine the Base Quarter?
Use simple exponential smoothing with α = 0.33 to forecast battery sales for February through May. Assume that the forecast for January was for 22 set of tires.
Richard is one of test takers. Find out the number of questions he can expect to get right on test by random guessing.
Assess the model fit for the multiple linear regression model using appropriate statistics and graphics.
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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