2. Consider the set of ages of students shown below: Ages (x) Frequency (f) 17 2 18 4 19 7 20 6 21 2 22 3 25 2 26 3 32 1 Consider the frequency distribution of ages of the students in a mathematics class. a. Find the mean ( x ). b. Find the median. c. Find the mode(s). d. Find the 5 number summary. e. A pair of identical twins joined the class. When their ages are added, the mean ages in the class is 21.16 years. How old are the twins? 3. 4. The heart rates for puppies are normally distributed, with a mean heart rate of 180 beats per minute (60-160 beats per minute for most adult dogs) with a standard deviation of 6 bpm (beats per minute). a. What percentage of puppies will have heart rates of less than 187 bpm? b. What percentage of puppies will have heart rates between 170 bpm and 187 bpm? c. If 500 puppies are examined, how many would you expect to have a heart rate of less than 187 bpm? d. 10% of all puppies will have a heart rate greater than what value?
2. Consider the set of ages of students shown below:
Ages (x)
Frequency (f)
17 2
18 4
19 7
20 6
21 2
22 3
25 2
26 3
32 1
Consider the frequency distribution of ages of the students in a mathematics class.
a. Find the mean ( x ).
b. Find the median.
c. Find the mode(s).
d. Find the 5 number summary.
e. A pair of identical twins joined the class. When their ages are added, the mean ages in the class is 21.16 years. How old are the twins?
3.
4. The heart rates for puppies are normally distributed, with a mean heart rate of 180 beats per minute (60-160 beats per minute for most adult dogs) with a standard deviation of 6 bpm (beats per minute).
2. Consider the set of ages of students shown below:
Ages (x)
Frequency (f)
17 2
18 4
19 7
20 6
21 2
22 3
25 2
26 3
32 1
Consider the frequency distribution of ages of the students in a mathematics class.
a. Find the mean ( x ).
b. Find the median.
c. Find the mode(s).
d. Find the 5 number summary.
e. A pair of identical twins joined the class. When their ages are added, the mean ages in the class is 21.16 years. How old are the twins?
3.
4. The heart rates for puppies are normally distributed, with a mean heart rate of 180 beats per minute (60-160 beats per minute for most adult dogs) with a standard deviation of 6 bpm (beats per minute).
a. What percentage of puppies will have heart rates of less than 187 bpm?
b. What percentage of puppies will have heart rates between 170 bpm and 187 bpm?
c. If 500 puppies are examined, how many would you expect to have a heart rate of less than 187 bpm?
d. 10% of all puppies will have a heart rate greater than what value?
a. What percentage of puppies will have heart rates of less than 187 bpm?
b. What percentage of puppies will have heart rates between 170 bpm and 187 bpm?
c. If 500 puppies are examined, how many would you expect to have a heart rate of less than 187 bpm?
d. 10% of all puppies will have a heart rate greater than what value?
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