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Question: 1. To measure sample variance, is it more important that the sample variance be unbiased or that it vary minimally from a population variance?
2. What does the standard error measure?
3. How would the standard error change if
(a) the population standard deviation increased and
(b) the sample size increased?
an urn contains six chips numbered 1 through 6. two are chosen at random and their numbers are added together. what
At the 0.01 level, is bag selection independent of education level? Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?
In a test of a gender-selection method, 14 babies are born and 10 of them are girls. Find the number of different possible sequences of genders that are possible when 14 babies are born
it is claimed that a certain type of bipolar transistor has a mean value of current gain that is at least 210. a sample
Before deciding, the decision maker considers listening to the weather forecast on the radio. Draw an influence diagram that takes into account the weather forecast.
Is there any evidence to suggest that the mean cable car time is greater than 5.5 minutes? Use a = 0.05 and compute the p value to draw a conclusion.
This friend has four pairs of scores obtained randomly from a population. Her intention is to calculate a correlation coefficient rs and decide whether there is any significant correlation in the population. Give advice
(i) Verify that this is a legitimate finite probability model. (ii) Describe the event X (iii) Express the event "lifted weights at least once" in terms of X. What is the probability of this event?
Despite any problems it might have, summarize how you would justify using Student's t-test to compare two independent groups.
Compute the probability of receiving four calls in a five-minute interval of time. Compute the probability of receiving more than 10 calls in a five-minute interval of time.
Calculate the probability function and the probability distribution of X and identify the space of results and the underlined X random variable
At a 1% level of significance, test to see if the proportion of voters has changed. QUESTION 1: What is the best type of hypothesis test to apply for this problem?
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