Find the interquartile range of the salaries

Reference no: EM137663

Q. The scores on a university examination are normally distributed with a mean of 62 and a standard deviation of 11. If the top 10% of students are given A's, what is the lowest mark that a student can have and still be awarded an A?

A. 63.28 B. 70.97 C. 76.08

Q. A sample was taken of the salaries of 20 employees from a large company. The following are the salaries (in thousands of dollars) for this year (the data are ordered).

28 31 34 35 37 41 42 42 42 47 49 51 52 52 60 61 67 72 75 77

Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The interquartile range of the salaries will

A. be unchanged. B. increase by $3000. C. be multiplied by 3000.

Reference no: EM137663

Questions Cloud

Find the shape of this distribution : The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately.

Two histograms represent the distribution of acceptance rate : The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..

Density curve displayed : the maximum point total for the quarter was 200. The point totals for the 10 students are given in the stemplot below. For the density curve displayed below, which of the following is true?

Time plot of the values of variable : Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays

Find the interquartile range of the salaries : Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The interquartile range of the salaries will

Suppose we drew a histogram : Suppose we drew a histogram of these 18 death rates using class intervals 1 — 1.9, 2 — 2.9, 3 — 3.9, 4 — 4.9 and 5 — 5.9. Using the histogram, we would

Mean of the data represented in this stemplot : Consider the following stemplot. The mean of the data represented in this stemplot ?

Find five number summary for the midterm exam : The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be

Statistics questions : A sample of 160 workers in the downtown area classified each worker by race. A bar graph of the results is given below, but the bar for black workers in the graph below has been omitted.

User Account

All Pages