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Considering an event to be unusual if its probability is less than or equal to 0.05. Assume that a study of 300 randomly selected school bus routes showed that 279 arrived on time. Is it unusual for a school bus to arrive late?
What are the mean value and standard deviation of the number among these 15 that are from the second section? What are the mean value and standard deviation of the number of projects not among these first 15 that are from the second section?
How does one find expected profit from a probability demand distribution?
SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. What percent of test takers score less than 300?
A toy manufacturer wants to see how long, on average, a new toy captures children's attention. He tests 10 children selected at random and finds that their mean attention span is 33 minutes with a standard deviation of 6 minutes.
The price of shares of Bank of Florida at the end of trading each day for the last year followed the normal distribution. Assume there were 240 trading days in the year.
In a bag there are 20 marbles. The colors of the marbles are as follows: red - 5; blue - 8; green - 3; yellow - 4.
WonderDrug Company wants to test the effectiveness of a new headache drug. What sampling technique (simple random, stratified random, cluster, convenience) is WonderDrug Company using in each of the following studies?
Before 1918, in a random sample of 11 wolves spotted in the region, what is the probability that 8 or more were male?
Write down the probability of that the median of the sample or average medians is greater or more than 320 minutes?
An economics professor randomly selected 100 millionaires in the United States. The average age of these millionaires was 54.8 years with a standard deviation of 7.9 years.
Please answer the following: Prove that the square of an even number is even. Make sure to show all steps required.
What is the probability of a fatal accident over a lifetime?
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