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Find the following limit.:
Lim x →0 for 1-cos x²/x².sin x²
List down 5 of Random Sampling and 5 examplesof Non Random Sampling. Also, identify if what particular random sampling and non sampling techniques are being applied.
First Column
Random Sampling
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5.
Second Column
Non Random Sampling
1.
2.
3.
4.
5.
d) A random sample of size 36 was taken from a population distributed as Nμ,3.92.The value of the sample x was 15.6. i. Find a 90% confidence interval for μ. (5mks)
It is believed that value of μ is 17. Use your confidence interval to comment on this belief.(2mks)
- Using the provided information below,
x=33.2 , x2=131.67, y=30.78 , y2=116.52, xy=119.8 , and n=10
- Find the sample correlation coefficient r (4mks)
- Find the co-efficient of determination (2mks)
study was made of a sample of 25 records of patients seen at a chronic
disease hospital on an
outpatient basis. The mean number of outpatient visits per patient was 4.8,
and the sample standard
deviation was 2. Can it be concluded from these data that the population mean
is greater than four
visits per patient? Let the probability of committing a type I error be .05. What
assumptions are
necessary?
A study by Thienprasiddhi et al. (A-4) examined a sample of 16 subjects
with open-angle glaucoma
and unilateral hemifield defects. The ages (years) of the subjects were:
62 62 68 48 51 60 51 57
57 41 62 50 53 34 62 61
Can we conclude that the mean age of the population from which the sample
may be presumed to have been drawn is less than 60 years? Let alpha = 0.5
7.2.2 A study by Thienprasiddhi et al. (A-4) examined a sample of 16 subjects
with open-angle glaucoma
and unilateral hemifield defects. The ages (years) of the subjects were:
62 62 68 48 51 60 51 57
57 41 62 50 53 34 62 61
Can we conclude that the mean age of the population from which the sample
may be presumed to have been drawn is less than 60 years? Let alpha = 0.5
Conduct P-value method
The Mathematics Department in a certain university is conducting a study to determine how long it takes its graduates to find a job. A sample of 80 graduates was surveyed and it was found out that the average time it has taken a graduate to find a new job is 2.5 months, with a standard deviation of 2 months. Is there a sufficient evidence to conclude that the graduate of this department takes on the average more than two months to find a job? Use the 90% confidence level.
Consider all sample siza 5 fro this population 2 5 6 8 10 12 13 compute the mean u and standard deviation ó of the population
a population of pwd learners in 5 schools in a certain municipality of quezon province are (x) 9 5 6 12 and 25. suppose that two schools were selected as sample determine the mean and variance of the sampling disteibution of sample mean
R is bounded by the x axis, the y axis, and the line x =3 - y
#340153 on Dec 2023