A survey asked 50 students if they play an instrument and if they are in band. 1.25 students play an instrument.
2. 20 students are in band.
3. 30 students are not in band.
Which table shows these data correctly entered in a two-way frequency table?
Band
Not in band Total
0
20
20
O A.
Play instrument
Don't play instrument
Total
5
25
25
30
50
25
Band
Don't play
instrument
Total
20
Not in band
5
B.
25
0
25
Play instrument
Total
25
50
20
30
Band
Not in band Total
5 25
Play instrument
20
C.
Don't play instrument
0
25
25

step-by-step explanation:

12475909

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

10 b/c 5*2 =10

step-by-step explanation: