# Statistics

The question is:
In a study of 420,000 cell phone users in Denmark. It found that 135 developed cancer of the brain or nervous system. If we assume that such a cancer is not affected by cell phone, the probability of a person having such a cancer is 0.000340.

a) Assuming that cell phones have no affect on cancer, find the mean and tandard deviation for the numbers of people in groups of 420,000 that can be expected to have cancer of the brain or nervous system.
b) Based on the results from part (a), it is unusual to find that among 420,000 people, there were 135 cases of cancer of the brain or nervous system? Why ot why not?
c) What do the results suggest about the publicized concern that cell phones are a health danger because they increase the risk of cancer of the brain or nervous system?

1. 👍 0
2. 👎 0
3. 👁 282

## Similar Questions

1. ### science

Which of the follow comparisons would be an inaccurate analogy between prokaryotic cells and eukaryotic cells? A - A eukaryotic cell is like a college campus was a prokaryotic cell is like a one-room schoolhouse B - A eukaryotic

2. ### Algebra Problem Solving

Denise's cell phone plan is \$29.95 per month plus \$.10 per minute for each minute over 300 minutes of call time. Denise's cell phone bill is \$99.95. For how many minutes was she billed? Answer is 700 but what is the algebraic

3. ### math

By your cell phone contract, you pay a monthly fee plus some money for each minute you use the phone during the month. In one month, you spent 200 minutes on the phone, and paid \$22.45. In another month, you spent 350 minutes on

4. ### Statistics

Q1:(a) Make a relative frequency table of the data. Enter your answers to three decimal places. Cell Phone Owned Relative Frequency Android smartphone iPhone smartphone Blackberry smartphone Cell phone not smartphone No cell phone

1. ### physics

While riding in a hot air balloon, which is steadily descending at a speed of 1.39 m/s, you accidentally drop your cell phone. (a) After 4.00 s, what is the speed of the cell phone? (b) How far is the cell phone below the balloon

2. ### Algebra

Your cell phone plan costs 55 dollars a month, plus 35 cents per minute. Write an equation to represent the monthly bill of the cell phone plan.

Manuel pays a flat rate of \$105 for his cell phone. He is also charged \$0.12 for every text that he sends. His cell phone bill can be no more than the amount he has budgeted for it each month. If x represents the number of texts

4. ### physics

While riding in a hot air balloon, which is steadily descending at a speed of 1.39 m/s, you accidentally drop your cell phone. (a) After 4.00 s, what is the speed of the cell phone? (b) How far is the cell phone below the balloon

1. ### maths

In the year 2000 there were 350 mobile phones users living in the small town of Phoneville. Since 2000 the number of residents using mobile phones has increased by 25% each year, that is, each year the number of mobile phones

2. ### Gr10 Math

Charlene is looking into cell phone plans. Cell plus gives unlimited minutes for \$50/month.A1 Cell offers a \$40 monthly fee, plus 5ยข/min for any time over 300min oer month. a)Define two variables and write a linear equation to

3. ### algebra

Amy has set aside \$150 a month for her cell phone bill. Thecost for a monthly cell phone plan is a \$65 access fee plus \$20 per gigabyte of data used. Which expression represents the amount of money Amy has left from her monthly

4. ### Math

A cell phone plan cost \$30 per month for unlimited calling plus \$.15 per message. A. Write a linear model that represents the monthly cost of the cell phone plan if the user sends t text messages. B. if you send 200 text messages,