1 for the ages in exercise 1a construct a 95 confidence, Ask an Expert

Statistics

1. For the ages in Exercise 1:

a) Construct a 95% confidence interval for the mean age of all customers, assuming that the assumptions and condi- tions for the confidence interval have been met.

b) How large is the margin of error?

c) How would the confidence interval change if you had assumed that the standard deviation was known to be 10.0 years?

2. For the purchase amounts in Exercise 2:

a) Construct a 90% confidence interval for the mean pur- chases of all customers, assuming that the assumptions and conditions for the confidence interval have been met.

b) How large is the margin of error?

c) How would the confidence interval change if you had assumed that the standard deviation was known to be $20?

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91724574

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

Consider the study of two insect populations at two

Consider the study of two insect populations at two experimental stations. At station A, the egg hatch rate (computed from a set of 100 eggs at a time) is known to follow approximately a normal distribution with mean 62% ...

A doctor whats to exam prior medical records in an attempt

A doctor whats to exam prior medical records in an attempt to estimate the proportion of juvenile valley fever cases that escalated to spinal meningitis. He wants to estimate the proportion within 2% with 98% certainty. ...

A nutritional scientist wishes to study the effect of

A nutritional scientist wishes to study the effect of storage time on the amount of vitamin C (milligrams) contained in 50 gram freeze dried fruit packs when stored for one, one and a half and 2 years. Five fruit packs w ...

For each of the following describe1 the direction of the

For each of the following describe: 1. The direction of the relationship 2. The strength of the relationship 3. A verbal description of the relationship between the variables. r = -.96 between the craving for Taco Bell a ...

Can you please assist with this the stock price

Can you please assist with this. The stock price distribution is skewed to the right. The mean is $5 and the standard deviation is $6. At least what proportion of prices is located between 1.5 standard deviations. Hint: ...

A student is gathering data on the driving experiences of

A student is gathering data on the driving experiences of other college students. One of the variables measured is the type of car the student drives. These data are coded using the following method: 1 = subcompact, 2 = ...

Please show all worka pair of dice is tossed and the face

Please show all work. A pair of dice is tossed and the face number of each die is recorded. Assuming the dice are fair, what's the probability of the sum of the die faces showing is even?

Youve finally decided to retire at the ripe old age of 50

You've finally decided to retire at the ripe old age of 50, and due to some fancy investing, you have accumulated $750,000 in mutual funds. Based upon genetics, you're likely to live until you're 80. Since you've taken t ...

If you know your raw score is 35 your z score is -3 and

If you know your raw score is 35, your z score is -3, and your t score is 20. The mean is 50 and the standard deviation is 5. How would you use this information to solve for a percentile rank?

Cardinal industries had the following operating results for

Cardinal Industries had the following operating results for 2018: Sales = $33,813; Cost of goods sold = $23,967; Depreciation expense = $5,947; Interest expense = $2,685; Dividends paid = $1,951. At the beginning of the ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Statistics and Probability Expert