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You have ordered 10 bags of cement, which are supposed to weigh 94 kg each. The average weight of the 10 bags is 93.5 kg. Assuming that the 10 weights can be viewed as a realization of a random sample from a normal distribution with unknown parameters, construct a 95% confidence interval for the expected weight of a bag. The sample standard deviation of the 10 weights is 0.75.
Calculate the condence interval in R, and write the code you used.
a box contains one twenty-dollar bill and four one-dollar bills. two bills are randomly chosen one at a time without
only 3 reported that their health was excellent. Find the probability that when 13 adults are randomly selected, 3 or fewer are in excellent health.
Using the critical value approach and the sample information reported below, carry out a test of this statement. Let α = 0.05.
Explain the difference between independent samples and dependent samples. Classify the following as independent or dependent samples:
Suppose the probability you will get an A in this class is .25 and the probability you will get a B is .50. What is the probability your grade will be above a C?
in a recent study of the effectiveness of popular diet plans subjects were given a numerical score of how well they
in designing a fraction non comforming chart with centre line at p0.2 and three sigma control limits what is the sample
the value of the test statistic for testing if one population mean is larger than the other based on samples of size 24
julias food boothjulia robertson is a senior at tech and shes investigating different ways to finance her final year at
Diamonds and Hearts are red and Clubs and Spades are black. Suppose you randomly select three cards from the deck. The outcome of interest is the colour of each of the selected cards.
a researcher is interested in knowing if there are differences between the incidence of accidents among male and female
question 1. select any two qualitative data of your survey. from your qualitative data carry out at least two
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