# Statistics

A recent survey found that 63% of all adults over 50 wear glasses for driving. In a random sample of 80 adults over 50, what is the mean and standard deviation of those that wear glasses?

1. 👍 0
2. 👎 0
3. 👁 913
1. 0.6

1. 👍 0
2. 👎 0
2. ohh

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Statistics

A CBS News/New York Times survey found that 97% of Americans believe that texting while driving should be outlawed (CBS News website, January 5, 2015). a. For a sample of 10 Americans, what is the probability that at least 8 say

2. ### Physics

Why do older people who do not wear glasses read books farther away from their eyes than younger people do?

3. ### Math

In a class, 2/7 of the pupils are girls. 1/2 of the girls and 1/3 of the boys in the class wear glasses. If 10 boys wear glasses, how many of the girls wear glasses?

4. ### statistics

As a manager for an advertising company, you must plan a campaign designed to increase Twitter usage. A recent survey suggests that 85% of adults know what Twitter is. How many adults should you survey in order to be 90% confident

1. ### Math

In rod's family 3/4 of members wear glases. Of those who do not wear glasses, 1/3are male. What fraction of the family are males who do not wear glasses?

2. ### Alan

Mark below all of the statments that correctly describe the physical properties of glass. Glasses do not have slip systems. Glasses consist of both covalent and ionic bonding. Glasses are brittle at room temperature. Glasses are

3. ### Statisitics

Identify the population, and the sample in each of the following: A small college has 275 tenured full and associate professors. Twenty professors are randomly chosen to take part in a survey about the incorporation of technology

4. ### Mathematics

In a class of 20pupils, 10percent wear glasses. How many pupils wear glasses

1. ### statistics

A manufacturing company produces 10,000 plastic glasses per week. This company supplies plastic glasses to another company, which packages the glasses as part of picnic sets. The second company randomly samples 10 glasses from the

2. ### mathematics

in a class of 60 boys and 40 girls, it is observed tha 24 boys and 21 girls wear glasses. what is the probability that: (1)A student is picked at random from this calss wear glasses (2)A girl picked at random does not wear

3. ### Statistics

A recent survey found that 70% of all adults over 50 wear glasses for driving. You randomly select 30 adults over 50, and ask if he or she wears glasses. Decide whether you can use the normal distribution to approximate the

4. ### Math

In a class of 20 students, 40% are boys. Twenty-five percent of the boys and 50% of the girls wear glasses. How many students wear glasses?