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If the population size is equal to 5 and the sample size is equal to 3. How many possible sample can be drawn using the formula of without replacement?
If the population size is equal to 3 and the sample size is equal to 5. How many possible samples can be drawn using the formula of with replacement?
A group of students got the following scores in an achievement test:9,12,15,18,21 and 24 . consider the sample of size 3 that can be drawn from this population. Construct a sampling distribution of the resulting means and find the probability
A group of students got the following scores in an achievement test: 9,12,15,18, 21, and 24. Consider samples of size 3 that can be drawn from this population.
B.Construct a sampling distribution of the resulting sample means
SAMPLE MEANS FREQUENCY
PROBABILITY
Consider a population consisting of 1, 2, and 3. Suppose samples of size 3 are drawn from this population with and without replacement.
1. Determine the number of sets of all possible samples.
2. List all the possible samples, and compute the mean of each sample.
3. Construct the sampling distribution of the sample means
The mean serum-creatinine level measured in 10 patients 24 hours after they received a
newly proposed antibiotic was 1.2 mg/dL with standard deviation of 0.4mg/dL. If the serum level in the general population is 1.0mg, test the hypothesis that the serum level in this group is different from that of the general population. Use significant significant level of 0.05
The following table gives the recorded grades for 10 students on a midterm test and the final examination in a statistics course.
Student
Midterm Test
Final Examination
1
84
73
2
98
63
3
91
87
4
72
66
5
86
78
6
93
78
7
80
91
8
9
92
88
10
87
77
a. Calculate the rank correlation coefficient.
b. Test the hypothesis @ .05 level of significance.
There is a bag filled with 5 blue and 4 red marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting 2 reds?
The mean lifetime of the light bulbs produced by Volta Corporation is 1705 hours with a population standard deviation of 150 hours. The CEO of the company claims that a new production process has led to an increase in the mean lifetimes of the light bulbs. If Jeremy tested 130 bulbs made from the new production process and found that their mean lifetime is 1650 hours, test the hypothesis that the mean is not equal to 1705 hours using the level of significance of 0.10.
On average, an insurance company receives 6 claims between 14:00 and 16:00 on a particular day. What is the probability that the company receives exactly 17 claims between 08:00 and 16:00?
