MATH 10 De Anza College Relative Frequency Statistics Quiz need help with Statistics quiz,everything is in the file need help with Statistics quiz,everyth

MATH 10 De Anza College Relative Frequency Statistics Quiz need help with Statistics quiz,everything is in the file

need help with Statistics quiz,everything is in the file

need help with Statistics quiz,everything is in the file

need help with Statistics quiz,everything is in the file

need help with Statistics quiz,everything is in the file

need help with Statistics quiz,everything is in the file Math 10
Quiz : Ch. 1 & 2
Names: ______________________
You must show all appropriate work clearly and logically to receive any credit.
1) (12 pts) Given below is the data for the number of days 70 randomly selected patients remained hospitalized.
a. Fill in the underlined blank spaces in the table. If rounding is needed, round to 4 decimal places.
X
2
4
5
7
10
12
25
Frequency
5
8
21
16
12
6
2
Relative Frequency
5/70
8/70
1670
12/70
6/70
2/70
Cumulative Relative Frequency
0.0714
0.1857
0.4857
0.7143
1.0000
b. 80th percentile = ________
c. Read the statement – “Only 25% of patients remained hospitalized _____days or more”. Circle the answer that completes the
statement.
i. 5
ii. 7
iii. 10
iv. 12
e. What percent of patients remained hospitalized 10 or 12 days?
f. Are there any outliers for the above data? Show your work.
g. Draw a box & whisker plot above the scale.
h. Which quarters have the same spread of data?
Quarter 1
Quarter 2
Quarter 3
Quarter 4
None
i. Which interval has less than 25% of data?
2 to 5
5 to 7
7 to 9
10 to 25
2) (3 pts) Classify the following type of data (quantitative – discrete, quantitative – continuous, qualitative)
a.
Colors of baseball caps in a store: _______________________________
b.
Marital status of faculty members at the Physics department of a college:_____________________
c.
Lifetime of 12 flashlight batteries: ______________________________
3) (2 pts) For the Statistics test scores, the class mean is 63 and the standard deviation is 7, and for the Biology test scores the
class mean is 23 and the standard deviation is 3.9. John scored 75 on his Statistics test and 45 on his Biology test. Determine on
which test the student had a better score.
4) (3 pts) State the type of sampling used. (1pt each)
a.
Every 100th chocolate cookie box manufactured is checked to determine its fat content.
b.
There are 10 apartment buildings in the city. Suppose a researcher wishes to survey apartment residents. She selects at
random 2 buildings from the 10 and interviews all the residents of the buildings.
c.
Nursing supervisors are selected using random numbers in order to determine annual salaries.
5) (3 pts) A Poll taken by the local newspaper, asks 500 randomly selected American citizens in Santa Clara County between the
ages of 18 and 25 years, if they are in favor of gun control. 63% of the people asked said “Yes”.
_____Population
a. 63%
_____Statistic
b. Yes, No, Undecided.
_____Variable
c. All American citizens in Santa Clara County between the ages 18 to 25 years
d. 500 randomly selected American citizens in Santa Clara County between the ages 18 to 25 years
e. The percent of American citizens in Santa Clara County between the ages 18 to 25 years who said
“Yes”.
f. Number of American citizens in Santa Clara County between the ages 18 to 25 years who said
“Yes”.
6) (2 pts) The payroll amounts for 26 major-league baseball teams are shown below.
10
8
5
2
1
0-10
10-20
20-30
30-40
Payroll of Baseball Teams (millions of dollars)
What is the median payroll amount?
40-50

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