Question

Question 21 4 pts A sample of 60 students at De Anza College was taken to estimate the average number of sodas consumed in a single day. Number of Sodas Consumed Frequency Relative Frequency Cumulative Relative Frequency 0 15 0.25 0.25 1 21 0.35 0.60 12 12 0.20 0.80 3 9 0.15 0.95 4 3 0.05 1.00 The mean is: 8.4 O 12 O2 1.4 Question 22 4 pts In a survey of single-pet owners, it was found that some had cats and some had dogs. The following table represents the data that was collected. Cats (C) Dogs (D) Totals Male (M) 12 38 50 Female (F) 68 22 90 Totals 80 60 140 Find the probability of being a female or owning a cat? O 68/140 102/140 O 80/140 O 80/90

Answer 1

Q21

Solution:

Here to find the mean that is the average number of sodas consumed in a single day

so mean is 1.4.

Solution : Number of Sodas consumed (x) Frequency (f.) f.* O 15 0015) - 21 1X21 21 2 12 2x12 = 24 3 g 3x9 = 27 4 3 4X3 12 TO+91 N-60 &fa; = 84 I formula for mean is = N 84 60 42 30 - 1.4 So, Megn is 1.4 Correct answer is fourth option.

This average number of sodas consumed in a single day is 1.4

Q22

Solution:

To find the probability of being a female or owning a cat

Total number of males and females is 140

Number of females is 90

Number of male and female owning a cat is 80

The formula of probability is

$P(E)= \frac{number \: of \: favourable \: cases}{Total \: number\: of \:exhaustive \: cases}$

9 22 Find the probability of being a female or owning a cat that is PCFUC) P(FUC) - PCF) + PCC) - P(FNC) 90 + 80 140 68 140 140 102 - 170-68 140 C 140 So probability of being a female or owning a cat is 10.2 140