Daisy measured the heights of 20 plants. The table gives some information about the heights (h in cm) of the plants.
Height of plants (h)
Frequency
0 <h < 10
1
10 < h < 20
4
20 <h < 30
7
30 <h <40
2.
40 <h <50
3
50 <h < 60
3
By using the midpoints of each group, work out an estimate
for the mean height of a plant.

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

Apoll is being conducted at a mall nothingto obtain a sample of the population of an entire country. what is the frame for this type of​ sampling? who would be excluded from the survey and how might this affect the results of the​ survey? what is the frame for this type of​ sampling? a. the frame is people who need new clothes. b. the frame is people who shop at the mall. c. the frame is people who like to shop. d. the frame is the entire population of the country. who would be excluded from the survey and how might this affect the results of the​ survey? a. any person that does not need new clothes is excluded. this could result in sampling bias due to undercoverage. b. any person who does not shop at the mall is excluded. this could result in sampling bias due to undercoverage. c. any person who does not shop at the mall is excluded. this could result in nonresponse bias due to people not participating in the poll. d. there is nobody that is being excluded from the survey.