A large company wants to find out what team-building activity its employees prefer. Which of the following samples can give the most valid generalization?(1 point)
Responses
all employees who have worked in the company for 5 years or more
all employees who have worked in the company for 5 years or more
a group with one member from each department
a group with one member from each department
all 624 female employees in the company
all 624 female employees in the company
400 randomly chosen employees from the list of all employees
400 randomly chosen employees from the list of all employees
A hotel maintenance crew wants to estimate how many of the 12,000 lamps in their 30-story hotel need a new light bulb. Which of the following is a random sample of lamps to be inspected?(1 point)
Responses
400 lamps on the first 10 floors
400 lamps on the first 10 floors
100 lamps on each floor chosen randomly
100 lamps on each floor chosen randomly
all lamps in booked rooms
all lamps in booked rooms
all lamps from the rooms with king-sized beds
all lamps from the rooms with king-sized beds
100 lamps on each floor chosen randomly
A local library manager randomly surveys 80 patrons about the type of book they borrow when they visit the library. The manager finds that 3 patrons borrow novels. If the local library has 345 patrons, approximately how many of them borrow novels when they visit the library? Round your answer to the nearest whole number. (1 point)
To estimate the number of patrons who borrow novels, we can set up a proportion:
3/80 = x/345
Solving for x:
x = 3 * 345 / 80
x ≈ 13
Approximately 13 patrons borrow novels when they visit the library.
Use the table to answer the question.
Group A 18 20 46 34 58 31 41
Group B 15 21 32 42 29 57 39The table shows the times, in minutes, spent shopping by two different groups. First find the mean times each group spent shopping. Then determine the difference in the mean times. Round your answers to one decimal place.(2 points)
The mean time Group A spent shopping is
minutes.
The mean time Group B spent shopping is
minutes.
The mean times Group A and Group B spent shopping differ by
minutes.
To find the mean time each group spent shopping, we can add up the times and divide by the number of members in each group:
Mean time for Group A = (18+20+46+34+58+31+41) / 7 = 34.1 minutes
Mean time for Group B = (15+21+32+42+29+57+39) / 7 = 33.4 minutes
The difference in mean times is:
34.1 - 33.4 = 0.7 minutes
Rounded to one decimal place, the answers are:
The mean time Group A spent shopping is 34.1 minutes.
The mean time Group B spent shopping is 33.4 minutes.
The mean times Group A and Group B spent shopping differ by 0.7 minutes.
Which data set has the highest median?(1 point)
Responses
{1, 10, 8, 29, 14, 17, 3}
, left brace 1 comma 10 comma 8 comma 29 comma 14 comma 17 comma 3 right brace
{11, 15, 16, 8, 12, 14}
, left brace 11 comma 15 comma 16 comma 8 comma 12 comma 14 right brace
{8, 20, 13, 14, 12, 9}
, left brace 8 comma 20 comma 13 comma 14 comma 12 comma 9 right brace
{1, 6, 15, 7, 15, 18, 14}
{11, 15, 16, 8, 12, 14} , left brace 11 comma 15 comma 16 comma 8 comma 12 comma 14 right brace
To find the median, we need to order the data set from least to greatest:
8, 11, 12, 14, 15, 16
The middle two numbers are 14 and 15, so the median is:
(14 + 15) / 2 = 14.5
None of the other data sets have a median as high as 14.5, so {11, 15, 16, 8, 12, 14} has the highest median.
Statistics Unit Test
6 of 156 of 15 Items
Question
Use the table to answer the question.
Value per House Number of Houses
$150,000 2
$220,000 4
$490,000 3
$540,000 2
$800,000 5
$975,000 2The values of several houses on Mango Street are displayed on the table. What is the median value of these houses?