Deneme Sınavı Soruları

20 soru
Cevap anahtarı açık: çöz, sonucunu gör

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1
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?
2

____________________________ is the probability distribution of all possible sample means that can be created from a population with a fixed sample size of n.
3
Which test statistic do we use when the population variances are unkonwn and the sample size is smaller than 30?
4
I. The probability distribution of the statistic is called its sampling distribution

II. The observations are selected randomly from the population

III. In a sample, observations are selected deliberately in order to manipulate the estimation

Which of the above are true about the features of point estimation?
5

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?
6
"If all the members in selected clusters are included in the sample, the method is called ______________. If only a sample of members taken from the clusters are included in the sample, the sampling method is ______________."

Which of the following correctly completes the blanks with the right order?
7
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?
8
Which one of the following is not one of the reasons of sampling?
9

Consider a sample of five firms from a population of 20 firms. If the sampling procedure gives each combination an equal probability, how many different samples are there?
10
Population of country A is 500.000, population of males is 240.000 (25 % are students), population of females is 260.000 (30 % are students). How many people are there in the target population for a survey to determine sports habits of students?
11
what do we call "P(fail to reject the null hypothesis H₀ when it is actually false)"?
12
A researcher wants to test whether the average exam scores of two student groups (X and Y respectively) are same or not. How will he/she formulate null hypothesis (H₀) and alternative hypothesis (H₁)?
13

A hypothesis test which is a _________________ that uses sample statistics to test a claim or assumption about the value of a population parameter?
14
In which sampling methods the sample includes the individiuals which are ready and availiable?
15
In which reason of sampling we consider "Some populations are uncountable or infinite to conduct a census"?
16
If someone wants to carry out a research to find out the smoking rate in females over the age of 50 living in Eskişehir, what is the target population for this research?
17
12, 8, 7, 6 15, 22

What is the standard deviation of the sample given above?
18
What is a statistical statement which specifies that there is a specific value of a population parameter?
19
There are 28 red apples, 24 green apples, 16 immature apples, 32 red tomatoes, 16 green tomatoes, and 20 immatue tomatoes in a box. What is the population proportion estimate of immature things in this box ?
20

In interval estimation, a ___________ is given for the value of a population parameter?

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