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The concentration of the solution is measured six times by one operator using same instrument. She gets following data: 63.2, 67.1, 65.8, 64.0, 65.1, and 65.3 (grams per liter).
(a) Compute sample mean. Assume that desirable value for this solution has been specified to be 65.0 grams per liter. Do you believe that sample mean value calculated here is close enough to target value to accept solution as conforming to target? Describe your reasoning.
(b) Compute sample variance and sample standard deviation.
(c) Why is it reasonable to have small variance of these measurements?
(d) Sketch dot diagram of the data.
If the amount of cosmic radiation to which a person is exposed while flying by jet across the US is a random variable having the normal distribution with µ=5.35 mrem, and σ = 0.59 mrem.
The sample correlation coefficient between x and y is 0.375. It has been found out that the p-value is 0.256 when testing H0: ρ = 0 against the two-sided alternative H1: ρ ≠ 0. To test H0: ρ = 0 against the one-sided alternative H1: ρ > 0 at a sig..
There are three versions of a board game released - version 1, version 2, and version 3. The versions are distributed equally and evenly among all potential sellers of board games.
Differentiate between descriptive statistics and inferential statistics. Provide an example for each. How does correlation analysis differ from regression analysis? What does a correlation coefficient reveal? Is correlation the same as causation?
Suppose that you are interested in determining the relation between the students average SAT scores [x] and their freshman GPA [y].
Here are the shopping times (in minutes) for a sample of shoppers at a particular shoe store: 25, 38, 34, 41, 37 and find the standard deviation of this sample of shopping times. Round your answer to at least two decimal places.
A store asked 250 of its customers whether they were satisfied with the service or not. The responses were also classified according to the gender of the customers. We want to study whether there is a relationship between satisfaction and gender.
A bag contains 4 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue?
In addition, the cruise line has decided to plan for an additional 25% more meals than bookings. Formulate the appropriate linear program (Constraints and Objective Function only)
A chemical process converts lead to gold. However, the production varies due to the powers of the alchemist. It is known that the process is normally distributed, with a standard deviation of 2.5 g. How many samples must be taken to be 90% certain..
The number of runs with respect to the sample median is:
Solve different inventory control problems using an appropriate OR method.
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