Applicants for a Particular Job,which Involves Extensive Travel in Spanish-Speaking

question 19

Multiple Choice

Applicants for a particular job,which involves extensive travel in Spanish-speaking countries,must take a proficiency test in Spanish.The sample data were obtained in a study of the relationship between the numbers of years applicants have studied Spanish and their score on the test.Use the regression analysis and summary statistics given below to find a 95% confidence interval for the average score of an applicant who has studied Spanish for 2.2 years. $$\begin{array} { l l l l c } \text { Variable } & \text { Count } & \text { Mean } & \text { StdDev } & \text { Range } \\\text { Years } & 10 & 3.5 & 0.341565 & 3 \\\text { Score } & 10 & 69.7 & 4.088058 & 41\end{array}$$ Dependent variable is: Score R-squared = 83.0%
S = 5.65138 with 10 - 2 = 8 degrees of freedom $$\begin{array} { l l l l l } \text { Variable } & \text { Coefficient } & \text { SE(Coeff) } & \text { t-ratio } & \text { P-value } \\\text { Constant } & 31.53333 & 6.360418 & 4.957745 & 0.00111 \\\text { Number of years } & 10.90476 & 1.744054 & 6.252538 & 0.000245\end{array}$$

• A)51.5 to 59.5
• B)43.1 to 70.9
• C)43.7 to 67.3
• D)48.9 to 62.2
• E)40.9 to 70.2

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Definitions:

Polyploid Cells

Cells that contain more than two paired (homologous) sets of chromosomes, often seen in plants.

Diploid Cells

Cells that contain two sets of chromosomes, one set inherited from each parent.

Zygotes

The initial cell formed when two gamete cells (e.g., sperm and egg) are fused, representing the earliest stage of embryonic development in sexually reproducing organisms.

Homologous Chromosomes

Pairs of chromosomes in a diploid organism that are similar in shape, size, and genetic content, one inherited from each parent.