All MCQs - Lecturer Statistics Past Papers and Syllabus Practice | PakExamPoint

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All MCQs and revision practice

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1. The error of rejecting the null hypothesis when it is true is known as?

باطل مفروضے کو درست ہونے پر رد کرنے کی غلطی کو کیا کہا جاتا ہے؟

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Answer: Type-1 error

Explanation A Type-1 error, also known as an alpha error. It occurs when a statistical test rejects a null hypothesis that is actually true. This is a "false positive" result , where a significant effect is detected when none exists.

2. Which of the following statements is true about the correlational analysis between two sets of data?

ڈیٹا کے دو سیٹوں کے درمیان ارتباطی تجزیہ کے بارے میں درج ذیل میں سے کون سا بیان درست ہے؟

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Answer: The correlational analysis between two sets of data is known as a simple correlation

Explanation Simple correlation , also known as Pearson's r. It is a statistical technique used to measure the strength and direction of the linear relationship between two continuous variables, X and Y. It is called "simple" because it involves only two variables.

3. If the member of unknowns are greater than number of equations, we use as the method for estimation?

اگر نامعلوم افراد کے رکن مساوات کی تعداد سے زیادہ ہیں، تو ہم تخمینہ کے طریقہ کار کے طور پر استعمال کرتے ہیں؟

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Answer: Least square method for estimation

Explanation When the number of unknowns is greater than the number of equations , the system is underdetermined, and there is no unique solution. In such cases , we use the method of least squares to estimate the unknowns.

4. The synonym of RHETORIC is?

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Answer: Oratory

Explanation RHETORIC means تقریر کا فن Oratory means تقریر کا فن

5. Geometric random variable P(X = n) =(1-p)^(n-1) p, holds?

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Answer: Independent trails and n = 1, 2, 3,.....

Explanation The geometric distribution is a probability distribution that models the number of independent trials until a first success, where each trial has a constant probability of success (p). The probability mass function is: P(X = n) = (1 - p)^(n-1) p This formula holds for independent trials , and n starts from 1 (not 0).

6. If 'm' is the mean of a Poisson Distribution, then variance is given by?

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Answer: m

Explanation The variance of a Poisson distribution is equal to its mean, which is denoted by m. This means that if a random variable X follows a Poisson distribution with mean m, then the variance of X is also m.

7. What will be properties of the OLS estimator in the presence of multicollinearity?

کثیر خطوط کی موجودگی میں او ایل ایس تخمینہ کنندہ کی خصوصیات کیا ہوں گی؟

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Answer: It will be consistent unbiased and efficient

Explanation In the presence of multicollinearity, the OLS estimator will still be consistent unbiased and efficient.

8. The dependence of a variable on two or more than two independent variable, the relation is said to be _____?

دو یا دو سے زیادہ آزاد متغیر پر متغیر کا انحصار، رشتہ _____ کہا جاتا ہے؟

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Answer: Multiple regression

Explanation Multiple regression is a statistical technique that examines the relationship between a dependent variable (outcome variable) and two or more independent variables (predictor variables). It helps to predict the value of the dependent variable based on the values of the independent variables.

9. The control charts and procedures of descriptive statistics which are used to enhance a procedure can be classified into which of these categories?

وضاحتی اعدادوشمار کے کنٹرول چارٹ اور طریقہ کار جو کسی طریقہ کار کو بڑھانے کے لیے استعمال ہوتے ہیں ان میں سے کس زمرے میں درجہ بندی کی جا سکتی ہے؟

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Answer: Statistical tools

Explanation Control charts and procedures of descriptive statistics used to enhance a process are classified as Statistical Process Control (SPC) tools. SPC is a methodology that uses statistical techniques to monitor and control processes to ensure they operate within predetermined limits.

10. Two mutually exclusive events are ____?

دو باہمی خصوصی واقعات ہیں؟

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Answer: Dependent

Explanation Two mutually exclusive events are dependent. If one event occurs , it completely affects the occurrence of the other, meaning the other event cannot occur , which makes them dependent in this context.

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