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Using the confidence intervals: 95%
Determine which groups differ in average shelf life.
A B C D
94 88 76 82
100 89 69 80
90 88 76 82
97 83 79 78
101 79 80 89
90 82 72 80
Give test statistic, hypothesis, decision rule and hypothesis
What is the appropriate set of hypotheses to test such that a possible outcome of the test would indicate;
She knows that 60% of the minerals have mass less than a certain amount m, and needs to select a random sample of n = 16 specimens for an experiment. With what probability will their average mass be less than the same amount m? (Hint: Calculate th..
A manufacturer of 35-mm cameras knows that a shipment of 30 cameras sent to the large discount store contains 8 defective cameras. The manufacturer also knows that the store will choose two of the cameras at a random, test them, and accept the shi..
Conceptually we would expect the probability of newborn males and females to be the same. However, census reports indicate that the ratios of males and females in various countries do not conform to the theoretical prediction.
Variance of 4.2 and mean of 23.2 were calculated. Find out 95% confidence interval on mean and standard deviation. Describe any potential problems with this analysis.
Which of these statements is NOT true about CPM and PERT?
Suppose that the National Labor Relations Board (NLRB) wishes to estimate the average hourly wage rate for a certain classification of skilled workers. It wishes to be 95% certain to get an estimate of sample mean within 0.05 of the truth.
A company is interested in estimating the mean number of days of sick leave taken by its employees. The firm's statistician randomly selects 100 personnel files and notes the number of sick days taken by each employee.
Determine out the regression equation. Determine the estimated sales if 40 contacts are made.
What is the difference between resampling (bootstrapping) and double sampling in research? Is there any difference or is the same? Please explain your response?
In a one-way ANOVA analysis of 3 treatments, with the total number of 9 observations, with an equal number of observations in each treatment, mean-square-error (MSE) was found to be 24.905.
Demonstrate your understanding of choosing the type of regression model to the given data, by explaning three factors that should be taken into account in the choice between different models.
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