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The average number of minutes of tardiness of students in a certain school in a remote area is 15 minutes with a standard deviation of 3.8 minutes. A sample of 35 students has an average tardiness of 13.4 minutes. Is the population mean significantly different from the sample mean at 10% level of significance?
Several samples of size 56 are randomly selected and means computed. What value would you expect to determine for standard deviation of all these sample means?
Suppose we are to receive 12 units at time 2, but will be required to pay out 8 units at time 3. Find the present value, and verify that it makes sense.
A survey of 100 clients of pacific gas and electric resulted in the following frequency distribution of monthly charges.
in answering a question on a multiple-choice test a student either knows the answer or guesses. let p be the
A consumer organization wants to know whether there is a difference in the price of a particular toy at three different types of stores.The price of the toy was checked in a sample of five discount stores, five variety stores, and five department ..
A geneticist conducts her survey and calculates hat p = 0.512. Which of the following is the most correct interpretation of this statistic? a) There is a 51.2% chance that a randomly selected gamete cell will have the male chromosome.
find the test statistic f to test the claim that the populations have the same mean.brand 1brand 2brand
Interest rates. Here's a plot showing the federal rate on 3-month Treasury bills from 1950 to 1980, and a regression model fit to the relationship.
q1. show that for a sample of n 39 the smallest and largest z values are - 1.96 and 1.96 and the middle i.e. 20th z
What is the probability that a candidate is over 60 and female? Given that the candidate is male, what is the probability he is less than 60? Given that the person is over 60, what is the probability the person is female?
State the null and alternative hypotheses and explain how you develop these two (2) hypotheses.
The mean fare charged for service from the beach to the airport is $18.00 and the standard deviation is $3.50. We select a sample of 15 fares. What must you assume to make the above calculation?
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