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Quiz on OCR S1 #aslevel #statistics #ocr
Flashcards
15 cards
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Questions
15
Answers
1
Find the mean of x and y
1, 0.5
Insufficient Information
31, 36
21, 16
2
Whatare
possible
values of r and r
s
for this scatter diagram?
r= -1, rs= -0.9
r = -1, rs = -1
r= -0.9, rs= -1
r= -0.9, rs= -0.9
3
If X ~ B(10, 0.4) then P(2 < X < 6) =
0.6665
0.4515
0.7779
0.6943
4
The probability a text is sent is 0.85. I try to send 8 texts; the probability 7 are sent is
0.857x0.15
8C7x0.857x0.15
8C7x0.857
1
5
Find the probability.
1/10395
1/6
1/665280
1/462
6
From a group of 4 females & 2 males, how many teams of 3 with exactly 1 male can be made?
2
20
12
120
7
Find the probability.
0.216
0.064
0.096
0.144
8
If X ~B(8, 0.3), find E(X) and Var(X)
2.4,1.68
8,0.3
2.4,0.72
2.4,1.30
9
Histogram question....
w= 2cm, h = 8cm
w= 4cm, h = 8cm
w= 4cm, h = 16cm
w= 2cm, h = 16cm
10
Conditional Probability Question...
20/81
5/18
1/2
4/9
11
Find the mean and standard deviation if Σx =30, Σx
2
= 250, n=10
3, 5
3, 4.69
3, 4
3, 16
12
Find Spearman's Rank Correlation Coefficient
-0.492
0.5
0.917
-5.75
13
From which diagram would it be most easy to estimate the mean of some data?
Cumulative Frequency
Histogram
Box & Whisker
Tree Diagram
14
Find a and b
Insufficient Information
a= 0.175, b = 0.175
a= 0.15, b = 0.2
a= 0.2, b = 0.15
15
The no. of arrangements of the letters of the word STATISTICS is
50400
3628800
604800
1000000000
