Determine whether the distribution is a probability distribution of a discrete random variable. 1. x -2 0 2 4
P (x) 0.3 0.5 02. 01

2. x 0.5 0.25 0.25
P(x) -0.4 0.6 0.8

3. x 1.1 2.5 4.1 4.6 5.3
P(x) 0.16 0.14 0.11 0.27 0.22

step-by-step explanation:

whatvare the choices

step-by-step explanation:

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;