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The final score in a statistics course follows a normal distribution with mean 68 and standard deviation 12.
(a) What proportion of students in the course would pass if they need at least 50 to pass in the course?
(b) Suppose 5 students are randomly selected from those in the course. Then, what is the probability that exactly two of them will fail in the course if we apply the same standard as in (a).
The last lessons have spent a lot of time describing the slope and intercept terms (and their variances) of the one-variable sample regression function.
What is the probability that the sample of 16 pencil leads will have an average MIR between 6400 and 6550 psi? What assumptions did you make when answering the previous questions?
The test question was if this difference between the test statistics and the stated life of the battery was significant? The .05 significant level was selected for the test. Which is the correct statement?
36 values given here are based on summary statistics from research by cumming. Do you think that these data are normally distributed?
in a large section of a statistics class the points for the final exam are normally distributed with a mean of 72 and a
What signified to you on all of the problems that required a normal distribution that you were to use a normal distribution? Which problems required a normal distribution?
Which of the following statements is true regarding a nonparametric test?
two options are provided for generating hot water at steady state.in a water heating is achieved by utilizing
suppose that two fair i.e. the probability of both heads and tails is 0.5 coins are tossed and we observe the results.
A sample consists of the following n =7 scores: 5, 0, 4, 5, 1, 2, and 4- Compute the mean and standard deviation for the sample.
the life expectancy of a common brand of battery is normally distributed with a mean of 400 hours and a standard
Calculate each project's expected return, variance, and standard deviation. Rank the projects on the basis of (1) expected return and (2) risk. Which project would you choose?
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