In: Statistics and Probability
21) The weight of a bouquet of a dozen roses has a bell-shaped distribution with mean 30 oz and standard deviation 2 oz. One bouquet had a z-score of -3.25. Which is correct?
a) This bouquet could be considered to be an outlier because its weight is way above average.
b) This bouquet is 3.25 standard deviations above the mean
c) This bouquet could be considered to be an outlier because its weight is way below average.
d) This bouquet is about average in weight.
e) This bouquet is 3.25 standard deviations below the mean.
22) Find the regression line for the given data. Make sure you use LinReg(a+bx) on your calculator.
x |
1.2 |
1.4 |
1.6 |
1.8 |
2 |
y |
54 |
53 |
55 |
54 |
56 |
a) y = 2x - 50.4
b) y = 50.4
c) y = 2.5x + 45
d)None of these
23) The demand for vegetarian sandwiches each day for eight consecutive days is given below. Find the interquartile range (IQR).
16 19 25 24 26 22 44 28
a) 55
b) 10
c) 44
d) 6.5
e) 30.5
24) The number of seats in a movie theater. Determine whether the data is from a discrete or continuous data set.
a) Discrete
b) Continuous
25) Which of the following numerical summary measures cannot be easily approximated from a box plot?
a) Median
b) IQR
c) Q1
d) Range
e) Variance
b) Continuous