Based on historical data, your manager believes that 41% of the company's orders come from first-time customers. A random sample of 127 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.21 and 0.39? Note: You should carefully round any z-values you calculate to 4 de
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Based on historical data, your manager believes that 41% of the company's orders come from first-time customers. A random sample of 127 orders will be used to estimate the proportion of first-time-customers. What is the probability that the sample proportion is between 0.21 and 0.39?
Note: You should carefully round any z-values you calculate to 4 decimal places to match wamap's approach and calculations.
Answer = _________ (Enter your answer as a number accurate to 4 decimal places.)
A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y).
The results of the regression were:y=a+bx b=-1.376 a=26.924 r2=0.855625 r=-0.925 Use this to predict the number of situps a person who watches 1 hours of TV can do.
__________ Round to one decimal place.
You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 40 bacteria reveals a sample mean of ¯x=66x¯=66 hours with a standard deviation of s=4.8s=4.8 hours. You would like to estimate the mean lifespan for this species of bacteria to within a margin of error of 0.5 hours at a 98% level of confidence.
What
n = ________ bacteria
Write an equation in the form y=mx+by=mx+b for the following table:
| x | y |
|---|---|
| -10 | -49 |
| -8 | -37 |
| -6 | -25 |
| -4 | -13 |
| -2 | -1 |
| 0 | 11 |
| 2 | 23 |
| 4 | 35 |
y= _______
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