A manufacturer produces widgets that are packaged in boxes of 100. The probability of a widget being defective is 0.021. Find the mean and standard deviation for the number of defective widgets in a box.

Step-by-step explanation:

From the question we are told that:

Sample size

Probability of  a defective widget

Generally the equation for binomial trial is mathematically given by

Since X is binomial random variable with functions of n and p,The equation of mean \=x

  Where

Generally the equation for variance \sigma is mathematically given by

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

1: -2 3/4, -2 1/2, -14, 0, 3, 8 1/3

2: -4, -3, -2 1/2, -2 1/4, 3 1/4,

step-by-step explanation: