# Statistics help

Asked May 6, 2012, 08:28 PM —
Question # 1

In a city in Italy, 30% of the families have a MasterCard, 20% have an American Express card, and 25% have a Visa card. Eight percent of families have both a MasterCard and an American Express card. Twelve percent have both a Visa Card and a MasterCard. Six percent have both an American Express card and a Visa card.

What is the probability of selecting a family that has either a Visa card or an American Express card?
If a family has a MasterCard, what is the probability that it has a Visa card?
If a family has a Visa card, what is the probability it has a MasterCard?

Show all work.

Question # 2

A National study has determined that people who work full time average 43.4 hours worked per week.

Assume that the number of hours worked per week for those who work full time is normally distributed. Suppose 12% of these workers work more than 48 hours. Based on this percentage, what is the standard deviation of number of hours worked per week for those workers?
ID: GB513-02-08-A

## Check out some similar questions!

Bring to mind a real-world situation or problem that could be addressed using a one-way analysis of variance (ANOVA). The real-world situation or problem you selected to address, the independent and dependent variables you would study and the number of levels of the independent variable, the...

In a classic study of infant attachment, Harlow (1959) placed infant monkeys in cages with two artificial surrogate mother. One â€śmother was made from bare wire mesh and contained a baby bottle which the bottle from infants could feed. He other mother was made from soft terry cloth and did not...

In a management class of 100 students' three languages are offered as an additional subject viz. Hindi, English and Kannada. There are 28 students taking Hindi, 26 taking Hindi and 16 taking English. There are 12 students taking both Hindi and English, 4 taking Hindi and English and 6 that are...

What does it mean for a sample to have a standard deviation of s=5? Describe the score in such a sample (describe where the scores are located relative to the sample mean.)