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Suppose the life span a cell phone is normally distributed with a mean of 5 years and a standard deviation of 9 years. The company gurantees that any cell phone which malfunctions within 3 years of purchase will be replaced. What percentage of cell phones do they expect to replace?
A coin was flipped 100 times and came up heads 59 times and tails 41 times. The expected outcome was to land on heads or tails 50 times each.
If 30% of the athletes have been disqualified in previous terms, what is the probability that a randomly selected athlete will be disqualified during the next grading period?
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
Each vehicle had the gallon of gas added to the empty tank and then driven until empty. Number of miles travelled for all twelve readings are below. Use data to compute the mean and median mileages.
Assume that each of the following studies cannot be analyzed using a parametric procedure. For each of the following studies (below), indicate the appropriate nonparametric procedure, and explain why you chose it.
Considering the simple case of linear regression analysis (one dependent and one independent variable) please share a couple of limiting and empowering factors related to this important tool.
In other words, explain why, all else being equal, as sample size increases the likelihood of finding a statistically significant relationship increases.
At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml.
To determine the public's opinion of the police department, the police chief obtains a cluster sample of 15 census tracts within his jurisdiction and samples all households in the randomly selected tracts. Uniformed police officers go door to door..
What are some conditions under which business decisions are made using subjective probability concepts? Could you please cite two examples of subjective probability.
What is the probability that none of these crimes will be solved? What is the probability that at least one of these crimes will be solved?
Can we conclude that there is a difference in number of citations written between the officers? Use the 0.05 level of significance.
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