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Police investigating an accident measure skid marks from car A to be 37.6 m before its impact with car B. From the damage to car B, it is estimated that car A was traveling at 20.0 km/h when it impacted car B. Car A is known to have a maximum deceleration of 9.35 m/s2. How fast must car A have been going before its brakes were applied? Answer 97.5 km/h (27.1 m/s)
Construct a 95% confidence interval on the population mean for the following sample data set:
If we assume that the distribution of ages is mound-shaped and symmetric. What percentage of the respondents will be between 64.29 and 93.54 years old?
Find the mean, median, mode, sample variance, and range. Do you think that this sample might have come from a normal population? Why or why not?
When the necessary conditions are met, a two-tail test is being conducted to test the difference between two populations proportions.
If the manufacturer stocks 100 components, what is the probability that the 100 orders can be filled without reordering components?
If you assume returns follow a normal distribution, which investment would give a better chance of getting at least a $40 million return? Explain. (B) How could your answer to part (A) change if you knew returns followed a skewed distribution inst..
Box 1 has 3 chips numbered 1,2,3. Box 2 has 2 chips numbered 1 and 2. Suppose a chip is randomly selected from box 1 and placed in box 2.
If one person is selected at random, what is the probability that person is Female?
Assume that the lives of all such bulb (approximately) normally distribution. Make the 99% confidence intervals for the variance and standard deviation of the lives of all such bulbs.
Categorize the events as dependent or independent. Events A and B where P (A) = 0.7, P (B) = 0.8, and P (A and B) = 0.56.
Found that 47% enjoy playing sports. would confidence in the results increase if the sample size were 3600 instead of 1100. why or why not?
Confirm that these statements are accurate by finding the geometric mean rate of increase.
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