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)
To find the mean daily high temperature of each sample, we add up all the temperatures and divide by the number of temperatures:
Mean of Sample 1: (78 + 82 + 85 + 87 + 90 + 85 + 79 + 86 + 91 + 88) / 10 = 85.1°F
Mean of Sample 2: (81 + 79 + 80 + 86 + 89 + 92 + 82 + 88 + 84 + 87) / 10 = 85°F
The mean daily high temperature of Sample 1 is 85.1°F and the mean daily high temperature of Sample 2 is 85°F.
To find the difference between these mean temperatures, we subtract the mean temperature of Sample 2 from the mean temperature of Sample 1:
85.1°F - 85°F = 0.1°F
Therefore, the mean daily high temperatures of the two samples differ by 0.1°F.
almost all of the answers given are incorrect, if someone else is looking at them for answers DO NOT USE.
A randomly selected 500 lamps from throughout the hotel.
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
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
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?(1 point)
To find an estimate of the number of patrons who borrow novels, we can use the proportion of patrons who borrow novels in the sample of 80 patrons.
Proportion of patrons who borrow novels in the sample = 3/80
To estimate the number of patrons who borrow novels in the whole library, we can multiply this proportion by the total number of patrons in the library:
Estimated number of patrons who borrow novels = Proportion of patrons who borrow novels in the sample * Total number of patrons in the library
Estimated number of patrons who borrow novels = (3/80) * 345
Estimated number of patrons who borrow novels = 12.9375
Rounding to the nearest whole number, we estimate that 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.
The mean time Group A spent shopping is:
(18 + 20 + 46 + 34 + 58 + 31 + 41) / 7 = 32.3 minutes
The mean time Group B spent shopping is:
(15 + 21 + 32 + 42 + 29 + 57 + 39) / 7 = 34.3 minutes
The mean times Group A and Group B spent shopping differ by:
34.3 - 32.3 = 2 minutes
Which data set has the highest median?(1 point)
Responses
{11, 15, 16, 8, 12, 14}
, left brace 11 comma 15 comma 16 comma 8 comma 12 comma 14 right brace
{1, 10, 8, 29, 14, 17, 3}
, left brace 1 comma 10 comma 8 comma 29 comma 14 comma 17 comma 3 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}