Section 10. there are 250 students in the economics department. A random sample of 40 students revealed the mean monthly wages of their families was JD 450 and the standard deviation was JD 75, what is the confidence interval for the population mean at 99% confidence level? (2 Points) 482.11 , 417.89 325.66, 315.86

Section 10. there are 250 students in the economics department. A random sample of 40 students revealed the mean monthly wages of their families was JD 450 and the standard deviation was JD 75, what is the confidence interval for the population mean at 99% confidence level? (2 Points) 482.11 , 417.89 325.66, 315.86

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Concept explainers

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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4:44 7
Mid-Statistics Exam First Semester (Statisti.
Mid-Statistics Exam First Semester (Statistics Section 1)
Required
Section
10. there are 250 students in the economics
department. A random sample of 40 students
revealed the mean monthly wages of their families
was JD 450 and the standard deviation was JD
75, what is the confidence interval for the
population mean at 99% confidence level?
(2 Points)
482.11, 417.89
325.66, 315.86
570.75, 560.25
268.35 , 231.65
None of Above
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