Astatistician is testing the null hypothesis that exactly half of all engineers will still be in the profession 10 years after receiving their bachelor's. she took a random sample of 200 graduates from the class of 1979 and determined their occupations in 1989. she found that 111 persons were still employed primarily as engineers. (a) construct a 95% confidence interval estimate for the proportion of engineers remaining in the profession. (ignore the continuity correction and use the formulas on p. 314.)

lower limit =

upper limit =

(b) at the 5% significance level, should the statistician accept or reject her hypothesis?

reject h0accept h0

see below

step-by-step explanation:

7.   there are 10 data points in the set.   the middle point is between 5 and 6.   the middle point in the top half is 8   and the middle point in the bottom half is 3. to find the iqr , take point 8 and subtract point 3

mid term   point 8 = 100   point 3 = 88

iqr = 100-88 = 12

final   point 8 = 93   point 3 = 78

iqr = 93 - 78 = 15

the final has the greatest iqr

6.   b - there is a high data value that causes the data set to be asymmetrical for the males: the data for males are high and asymmetrical .   there is an outlier for the males that skews the data

5.   the   iqr is a better measure of spread for the movies and basketball games.   since the basketball game has an outlier, we do not want to use standard deviation for measurement.  

3.   the exam median is much higher than the class median.   the median line is farther to the right on the exams

2.   there is no way to tell what the means are from the box and whisker plots.  

false

step-by-step explanation:

false.   two legs of the trapezoid would be congruent, but the other two would not.   were all the legs congruent, then we'd have a square; were the 2 shorter sides congruent and the 2 longer sides also congruent, we'd have a rectangle.

the correct answer is $7.38

step-by-step explanation:

the answer is 40.

proof: