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Question: During the past 10 years, Minnesota Pollution Control Agency has measured the concentration of chlorophyll-a in Lake Calhoun 64 times. The mean concentration 2' was 3.6 parts per billion (ppb). It is known that the standard deviation σ was 1.6 ppb.
Is this a firm evidence that the the mean concentration of chlorophyll-a in Lake Calhoun is greater than 3.0 ppb? Answer your question by computing Pr(X‾ > 3.6 | μ= 3.0). Assume that the distribution of chlorophyll-a concentration is normal.
Given the variances of the two samples below, find the test value and the degrees of freedom that should be used in an F test.
Their monitoring plan will take a random sample of 5 days sales per month and use the sample mean sales to identify shops that are under-performing. Establish the lower limit sales such that only 5% of the shops would have a sample sales mean belo..
The remaining 5 were not given the overview. Here are the scores for students in each group:
Both intervals were calculated from the same sample data. The confidence level for one of these intervals is 90% and for the other is 99%. Which of the intervals has the 90% confidence level, and why?
Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
A box contains 3 blue marbles and two red marbles. If two marbles are drawn randomly and without replacement, find the probability that (a) at least one of the marbles is blue
If a simple random sample of 80 seniors is taken, what is the probability that at most 64 of them will be accepted into college.
Qualitative or ethnographic research uses open-ended questions that attempt to nuance the distinctions that quantitative research attempts do to numerically.
It is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford's Law, shown below.
When using SPSS to perform a 2 independent sample t-test, the P-Value was .136...with alpha set to .05. I have to decide to accept or reject the null hypothesis.
Determine whether the sentence is statement. Please justify. Write a negation of the inequality.Do not use a slash sign. Answer must be written as an equality.
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
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