A certain group of test subjects had pulse rates with a mean of
77.6 beats per minute and a standard deviation of 10.2 beats pr minute.
Use the range rule of thumb to identify the limits separating values that are significantly low or significantly high.
Is a pulse rate of 68.0 beats per minute significantly low or significantly high?
 
 
Significantly low values are ?????? beats per minute or lower. (Type an integer or a decimal. Do not round.)
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Significantly high values are ??????? beats per minute or higher. (Type an integer or a decimal. Do not round.)
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Is a pulse rate of 68.0 beats per minute significantly low or significantly high?
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Class width is found by __________.     Choose the correct answer below.
 
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Below are the jersey numbers of 11 players randomly selected from a football team.
Find the range, variance, and standard deviation for the given sample data. What do the results tell us?
 
20       58       64       78      30       42       52      43       72       21      75
 
Range =     ????                                       (Round to one decimal place as needed.)
Sample standard deviation =     ????     (Round to one decimal place as needed.)
Sample variance =     ????                 (Round to one decimal place as needed)
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What do the results tell us?
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Sample Standard Deviation: TI 84 Plus
 
Steps
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The table below shows the frequency distribution of the rainfall on 52 consecutive
Tuesdays in a certain city use the frequency distribution to construct a histogram.
Do the data appear to have a distribution that is approximately normal?
Do the data appear to have a distribution that is approximately normal?




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Explanation:
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Among fatal plane crashes that occurred during the past 60 years, 143 were due to pilot error.
72 were due to other human error, 511 were due to weather,
339 were due to mechanical problems, and 669 were due to sabotage.
 
Construct the relative frequency distribution.
What is the most serious threat to aviation safety, and can anything be done about it?
 
Complete the relative frequency distribution below Cause Pilot error.
 

 
What is the most serious threat to aviation safety, and can anything be done about it?
 
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Explanation
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If your score on your next statistics test is converted to a z score, which of these z scores would you prefer:
-2.00, -1.00, 0, 1.00, 2.00? Why?
 
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Which of the following is NOT a value in the 5-numers summary?
Choose the correct answer below.
 
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The measure of center that is the value that occurs with the greatest frequency is the _____.
 
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A random sample of 10 subjects have weights with a standard deviation of 1098 kg.
What is the variance of their weights? Be sure to include the units with the result.
The variance of the sample data is 102.2081 kg².
(Round to four decimals as needed.)
 
Explanation
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Below are the jersey numbers of 11 players randomly selected from a football team.
Find the range, variance, and standard deviation for the given sample data.
 
1          68       66      60      43       70      93       22       64       83       42
 
Range = ???? (Round to one decimal place as needed.)
Sample standard deviation = ???? (Round to one decimal place as needed.)
Sample variance = ???? (Round to one decimal place as needed.)
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Explanation
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TI84 Plus Steps

 
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In a recent awards ceremony, the age of the winner for best actor was 37,
and the age of the winner for best actress was 48.
For all best actors, the mean age is 47.5 years, and the standard deviation is 7.3 years.
For all best actresses, the mean age is 35.2 years, and the standard deviation is 12.4 years.
(All ages are determined at the time of the awards ceremony.) Relative to their genders, had the
more extreme age when winning the award. the actor or the actress?
 
Since the z score for the actor is z = ???? and the z score for the actress is z = ????, the ???? had the more age.
(Round to two decimal places.)
 
Explanation
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Find the standard deviation, s, of sample data summarized in the frequency distribution table below by using the formula below,
where x represents the class midpoint, f represents the class frequency, and n represents the total number of sample values.
Use the calculator to find the standard deviation.
 
 
(Round to one decimal place as needed.)
 
Calculate the intervals like below…
20 + 26 ÷ 2 = 23
27 + 33 ÷ 2 = 30
34 + 40 ÷ 2 = 37
41 + 47 ÷ 2 = 44
48 + 54 ÷ 2 = 51
55 + 61 ÷ 2 = 58
62 + 68 ÷ 2 = 65
 
Sample standard deviation
TI84 Plus

 
Please note: List must contain L1 & L2
Just to be sure, go to: STAT | CALC | 1-Var Stats | FreqList
Should Look Like This, if not hit 2^ND and the number 2

 
Sample standard deviation
TI84 Plus
Steps
 
STAT
EDIT
L1 & L2
Enter Data Set
STAT
CALC
Vars Stats
Calculate
 
Data Set                    
Interval                Frequency (data given on the bottom of chart)
     L1                            L2
------------------------------------------------------------
     23                            2
     30                            2
     37                            2
     44                            2
     51                            13
     58                            35
     65                            29
 
Sx = 9.301170072 (rounded to 9.3)
 
You will need to use L2 in the FreqList.
Just to be sure, go to:
STAT
CALC
1-Var Stats and FreqList
hit 2^ND and the number 2.
It should appear like below!