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A statistics department only accepts students with SAT-Math scores in the top 15% of the population. Given that the population of SAT-Math scores has a mean of 500 and a standard deviation of 100, what is the minimum score needed for admissions to the department?
The sample average number of strokes being more than 5.0.
Question 1What is the probability of winning a low, even, red, black, odd, or high bet in the game of American roulette? What is the probability of winning a bet placed on any one particular number, e.g., 33? Notice that under American roulette, ther..
Independent-Samples T-Test Computations, You obtain the data shown below for 30 girls with anorexia who were treated with psychodynamic therapy. These values can be interpreted as described in Week 6: Assignment 2.
The population proportion of customers under age 21 is 0.68.
What is the decision rule?
Pistorius had been arrested in 2009 for violent conduct involving a young woman, and he was also once investigated for illegal ownership of .38 caliber ammunition that defense lawyers said belonged to his father. An autopsy meanwhile found no signs o..
Why does a p-value provide a true measure of statistical significance? Try to relate your answer to previously covered concepts - example continuous probability distributions.
A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly selected adults are given an IQ test, what is the probability that the sample mean scores will be between 85 and 125 points?
A weight-loss clinic advertised that last month its patients, on average, lost 6 LBS . Assuming that average refers to the mean, which of the following claims must be true based on this information
1. Assume that the number of miles a particular brand of tire lasts before it needs to be replaced follows a normal distribution with a mean of 45,600 miles and a standard deviation of 5,800 miles. What is the probability that the next tire of this b..
Find the z-scores for which 88% of the distributions area lies within -z and z. The z-scores are ?
According to an IRS study, it takes a mean time of 290 minutes for taxpayers to prepare, copy and electronically transfer a 1040 tax form. The standard deviation of this distribution is 75 minutes. A consumer watchdog agency selects a random sample o..
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