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S1 OCR Revision Quiz SAN Flashcards | StudBud
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S1 OCR Revision Quiz SAN
S1 OCR Revision Quiz SAN
15 terms
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StudBud Administration
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116 plays
Quiz on OCR S1
Flashcards
15 cards
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Practice quiz
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Questions
15
Answers
1
What are
possible
values of r and r
s
for this scatter diagram?
r= -0.9, rs= -1
r = -1, rs = -1
r= -1, rs= -0.9
r= -0.9, rs= -0.9
2
Histogram question....
w= 4cm, h = 16cm
w= 2cm, h = 16cm
w= 4cm, h = 8cm
w= 2cm, h = 8cm
3
Find the mean and standard deviation if Σx =30, Σx
2
= 250, n=10
3, 16
3, 4.69
3, 4
3, 5
4
Find a and b
a= 0.2, b = 0.15
Insufficient Information
a= 0.175, b = 0.175
a= 0.15, b = 0.2
5
If X ~ B(10, 0.4) then P(2 < X < 6) =
0.6665
0.7779
0.6943
0.4515
6
Find the probability.
0.216
0.096
0.064
0.144
7
The no. of arrangements of the letters of the word STATISTICS is
50400
604800
1000000000
3628800
8
If X ~B(8, 0.3), find E(X) and Var(X)
2.4,0.72
2.4,1.68
2.4,1.30
8,0.3
9
Find Spearman's Rank Correlation Coefficient
-5.75
-0.492
0.917
0.5
10
From a group of 4 females & 2 males, how many teams of 3 with exactly 1 male can be made?
12
2
120
20
11
From which diagram would it be most easy to estimate the mean of some data?
Box & Whisker
Cumulative Frequency
Tree Diagram
Histogram
12
Conditional Probability Question...
4/9
20/81
5/18
1/2
13
Find the probability.
1/665280
1/462
1/6
1/10395
14
Given that X~Bin(20,0.14) calculate P(X≤E(X))
0.5540
0.4540
0.5440
0.4550
15
The probability a text is sent is 0.85. I try to send 8 texts; the probability 7 are sent is
8C7x0.857x0.15
1
0.857x0.15
8C7x0.857
