Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. basic math
  3. 1. a telephone company claims that less than 15% o

1. A telephone company claims that less than 15% of all college students have their own...

60.2K

Verified Solution

Question

Basic Math

1. A telephone company claims that less than 15% of all collegestudents have their own cell phone plan. A random sample of 70students revealed that 8 of them had their own plan. Test thecompany's claim at the 0.05 level of significance.

2. A college statistics instructor claims that the mean age ofcollege statistics students at a local Dallas-based institution is23. A random sample of 35 college statistics students revealed amean age of 25.1. The population standard deviation is known to be4.1 years. Test his claim at the 0.1 level of significance.

3. A random sample of 85 adults ages 18-24 showed that 11 haddonated blood within the past year, while a random sample of 254adults who were at least 25 years old had 18 people who had donatedblood within the past year. At the 0.05 level of significance, testthe claim that the proportion of blood donors is not equal forthese two age groups.

Answer & Explanation Solved by verified expert
3.8 Ratings (482 Votes)
1 Below are the null and alternative Hypothesis Null Hypothesis p 015 Alternative Hypothesis p 015 Test statistic z pcap psqrtp1pn z 01143 015sqrt015101570 z    See Answer
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Zin AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Q

Where can you find a depreciation expense?

Finance
Q

A machine has 6 heat conductors, each with a life time that follows a lognormal distribution...

Statistics
Q

The molar concentration of HCL in a solution used to remove boiler scale from plumbing can...

Chemistry
Q

xi A circuit consists of a source of a constant EMFE and a resistance R...

Physics
Q

Two spherical bodies of mass M and 5M and radii R and 2R respectively are...

Physics
Q

Energy is stored in the choke coil in the form of 1 Heat 3 Magnetic...

Physics
Q

Real GDP has gone up although the living standard enjoyed by the average citizen Real...

Basic Math
Q

what is an example of earnings management for clorox company? and explain its significance. (it...

Accounting
Q

Cullumber Hovercraft Inc. reported the following shareholders' equity: Preferred shares, 100,000 shares authorized, ...

Accounting
Q

In English, with citations: Provide a summary of the procedures of banks in the check...

Accounting
Q

A buyer purchases goods from an online seller. The goods will be delivered from the...

Accounting
Q

Factoring OR The role of industrial production in the Saudi economy

Finance