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Ten juniors and five seniors have applied for two open student council positions. School adminitrators have decided to randomly select the two new members. What is the probability that one junior and one senior are chose for the new positions?
a distribution is composed of the short-term memory scores of 79 people. the distribution has a mean of 56 and a
the type of sample statistic that is used to make inferences about a given type of population parameter is calleda. the
Perform a test to determine whether there is sufficient evidence to support a claim of a linear correlation between two variables. Find the critical values of r given the number of pairs of data n and the significance level alpha.
At one university, the distance to students' home is normally distributed with a mean of 200 miles and a standard deviation of 25 miles.
The proportion of people aged 18-25 who currently use illicit drugs is equal to 0.20 (or 20%). Now, express the null hypothesis H0 and alternative hypothesis H1 in symbolic form.
the number of telephone calls coming into a businesss switchboard averages 4 calls per minute.let x be the number of
How would I go about finding the probabilities for the following discrete random variables? Among a shipment of 5,000 tires, 1,000 are slightly blemished. If one purchases 10 of these tires, what is the probability that 3 or less (P (x
Thirty accidents of these vans were examined, and 11 vans had rolled over. Test the claim that the proportion of rollovers exceeds.
Here are the shopping times (in minutes) for a sample of shoppers at a particular shoe store: 25, 38, 34, 41, 37 and find the standard deviation of this sample of shopping times. Round your answer to at least two decimal places.
A student randomly guesses on all 25 questions of a true-false test. Use the normal approximation to the binomial to approximate Pr[ ], that is, that the student gets 10 or fewer questions correct.
What is your conclusion regarding null hypothesis?
Professor wishes to determine whether prior statistical knowledge assists students in their performance on the final exam. What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA. What SPSS test w..
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