Fig. shows repeated glucose measurement for a single sample. Choose the correct findings from the following statements.
LIST:
A. Instrument A is precise and unbiased.
B. Instrument B is precise and biased.
C. Instrument B has a positive bias.
D. Instrument C has only positive bias.
E. Instrument C is unbiased.
Fig. shows repeated glucose measurement for a single sample. Choose the correct findings from the following statements.
LIST:
A. Instrument A is precise and unbiased.
B. Instrument B is precise and biased.
C. Instrument B has a positive bias.
D. Instrument C has only positive bias.
E. Instrument C is unbiased.
Show Hint
- B, C and D only
- A, D and E only
- A, B and C only
- B, C, D and E only
The Correct Option is A
Solution and Explanation
- Precision: Consistency of repeated measurements (low variability).
- Bias: Deviation of the mean measurement from the true value.
Step 2: Instrument A.
Shows scattered values around the true level. Not precise, not unbiased. Hence statement (A) is incorrect.
Step 3: Instrument B.
Values are tightly clustered (precise), but consistently above the true level (positive bias). Hence statements (B) and (C) are correct.
Step 4: Instrument C.
Values are scattered, but shifted above the true level. It shows only positive bias but is not unbiased. Hence statement (D) is correct, (E) is incorrect.
Step 5: Conclusion.
Correct findings are B, C, and D only.
Top Questions on Biostatistics
- A study of 50 individuals found mean systolic blood pressure $\bar{x} = 124.6$ mm Hg with sample standard deviation $S = 10.3$ mm Hg. Find the no. of individuals needed to reduce the standard error of the mean to 1 mm Hg.
- Some study on human pregnancies were conducted and it is found that, human pregnancies have a gestation period that is approximately normal with $\mu = 39$ weeks and $\sigma = 2$ weeks. What is the z-score for a pregnancy that lasts 36 weeks?
- Random error associated with sampling and randomization are effectively addressed by confidence and hypothesis tests. These methods fail to address systematic errors. Systematic errors come in which of the following forms?
LIST:
A. Confounding bias
B. Information bias
C. Selection bias
D. Direction bias
E. Random bias
- Choose the correct statements about chi-square probability density function.
LIST:
A. They start at 0.
B. They are Symmetrical.
C. They have a mean equal to their degree of freedom.
D. They have variance equal to degree of freedom.
E. They have variance equal to 2 $\times$ degree of freedom.
- A Screening test has a sensitivity of 0.89 and a false-positive rate of 0.01. The test is used in a population that has a disease prevalence of 0.002. Given a positive result, find the probability of having the disease.
Questions Asked in CUET PG exam
A total hip prosthesis is shown with parameters: $L_1 = 5$ mm, $L_2 = 50$ mm, $\theta_1 = 45^\circ$, $\theta_2 = 90^\circ$. A joint reaction force of $F = 400$ N acts at the femoral head due to body weight of the patient. Determine the moment generated about point B, where cw and ccw are clockwise and counter-clockwise directions.
- CUET (PG) - 2025
- Biotechnology and Biomedical Techniques
Match the LIST-I with LIST-II. \[ \begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \hline A. \ \text{Franklin Stahl} & I. \ \beta\text{-form of DNA} \\ B. \ \text{Maurice Wilkins} & II. \ \text{Estimated absolute amount of each Base} \\ C. \ \text{Erwin Chargaff} & III. \ \text{Proposed two polynucleotide chain} \\ D. \ \text{Watson and Crick} & IV. \ \text{Individual strands of Duplexes are entirely heavy or light} \\ \hline \end{array} \]
- CUET (PG) - 2025
- Molecular Biology
Match the LIST-I with LIST-II.
\[ \begin{array}{|l|l|} \hline \textbf{LIST I (Pathogen)} & \textbf{LIST II (Detection methods)} \\ \hline A. \ \text{Legionella} & I. \ \text{Enzyme-linked immunosorbent assay (ELISA) or EIA for detection of P-24} \\ B. \ \text{HIV} & II. \ \text{Cartridge based nucleic acid amplification test (CBNAAT) Gene Xpert} \\ C. \ \text{Mycobacterium} & III. \ \text{Urinary antigen test} \\ D. \ \text{Salmonella typhi} & IV. \ \text{Widal test for antibody against both O and H antigens} \\ \hline \end{array} \]- CUET (PG) - 2025
- Microbiology
Match the LIST-I with LIST-II.
\[ \begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \hline A. \ \text{Increased $\beta$ – Lipoproteins} & I. \ \text{Very Low Density Lipoproteins} \\ B. \ \text{Increased $\beta$ and Pre- $\beta$ Lipoproteins} & II. \ \text{Intermediate Density Lipoproteins} \\ C. \ \text{Broad $\beta$ – Lipoproteins} & III. \ \text{Low Density Lipoproteins} \\ D. \ \text{Increased Pre $\beta$ – Lipoproteins} & IV. \ \text{Low Density Lipoproteins and VLDL} \\ \hline \end{array} \]- CUET (PG) - 2025
- Biotechnology and Biomedical Techniques
Match the LIST-I (Microbial pathogen) with LIST-II (Clinical syndromes):
\[ \begin{array}{|l|l|} \hline \textbf{LIST I (Microbial pathogen)} & \textbf{LIST II (Clinical syndromes)} \\ \hline A. \ \textbf{Haemophilus aegyptius} & I. \ Upper respiratory tract infection \\ B. \ \textbf{Haemophilus influenzae} & II. \ Pneumonia \\ C. \ \textbf{Haemophilus ducreyi} & III. \ Conjunctivitis \\ D. \ \textbf{Haemophilus haemolyticus} & IV. \ Chancroid (STD) \\ \hline \end{array} \]
Choose the correct answer from the options given below:
- CUET (PG) - 2025
- Microbiology