Statıstıcs II (ENG)
Ünite Sınavı Soruları
- 20 soru
- Soru metinleri açık; şıklar ve cevap anahtarı uygulamada
- 1
What is the sample proportion of a sample with frequency (f) 450 and sample size (n) 9000?
- 2
Sample values for a continuous variable (Eskişehir Porsuk river current flow rate ; as m3 / second) : 4, 5, 8, 11, and 12. What is the point estimate of the population arithmetic mean?
- 3
The frequency of recovery from illness after therapy A in a sample of 640 is 160. What is the point estimate of population proportion for recovery from illness?
- 4
the government policy planner is selected 4000 people from the population using cluster sampling, clusters are organized according to the geographical regions. Then, planner is found that the 1000 people in the sample live under the poverty threshold. What is the point estimate of the population proportion?
- 5
Interval estimation : the limits of the confidence interval are (397, 555), the significance level is 0.05. What is the sample arithmetic mean?
- 6
Sample values for a continuous variable (water flow rate ; as liter / hour) : 6, 12, 17, 36, 26, 15, 34, and 2. What is the point estimate of the population arithmetic mean?
- 7
Sample values for a continuous variable (noise level in Anadolu University Botanic Garden ; as decibel) : 21, 29, 34, 50, 55, 62, and 71. What is the point estimate of the population arithmetic mean?
- 8
Interval estimation : the limits of the confidence interval are (49.6, 50.4), the significance level is 0.01. What is the sample arithmetic mean?
- 9
Sample values for a continuous variable (electric current at home ; as amper) : 2, 3, 6, 9, 10, and 18. What is the point estimate of the population arithmetic mean?
- 10
Sample values for a continuous variable (weather temperature in a day ; as oC) : 10, 16, 20, and 28. What is the point estimate of the population arithmetic mean?
- 11
Sample values for a continuous variable (noise level in a classroom ; as decibel) : 32, 38, 46, 48, 54, and 64. What is the point estimate of the population arithmetic mean?
- 12
Sample values for a continuous variable (sea water temperature in a day ; as oF) : 70, 71, 72, 76, 77, and 78. What is the point estimate of the population arithmetic mean?
- 13
A random sample of a data set is as follows: 3, 4, 4, 4, 7,4, 5, 6, 7, and 9. What is the point estimate of the population arithmetic mean?
- 14
As the Central Limit Theorem states, What is the type of distribution of the independent samples approximates?
- 15
Interval estimation problem : the population standard deviation is not known, the sample standard deviation is 28, there are 49 observations in the sample. What is the value of the standard error to calculate the confidence interval?
- 16
___________________________, denoted by π, is the proportion of the members/objects/individuals of a population that have a specific characteristic of interest?
- 17
How many different samples of size 2 can be created from this population with 7 students?
- 18
In interval estimation, a ___________ is given for the value of a population parameter?
- 19
For age variable the following sample data is gathered: 45, 47, 42, 40, and 51. What is the point estimate of the population arithmetic mean for variable age?
- 20
In Interval estimation problem: the sample arithmetic mean is 26 and the upper limit of the confidence interval is 33, then what is the lower limit of the confidence interval?