Question

A market research firm conducts telephone surveys with a 36% historical response rate. a. What is...

A market research firm conducts telephone surveys with a 36% historical response rate.

a. What is the probability that in a new sample of 400 telephone numbers, at least 160 individuals will cooperate and respond to the questions? In other words, what is the probability that the sample proportion will be at least 160/400 = 0.4?

Q: Calculate the standard error to 4 decimals. _______
Q: Calculate the probability to 4 decimals, showing your steps along the way.
P(P( ≥ ____ ) = P(z ≥ _____ ) = ______

b. If a follow-up study was completed a year later with only 64 telephone numbers, what is the probability that the response rate was between 34% and 41%?
Q: Calculate the standard error to 4 decimals. _______
Q: Calculate the probability to 4 decimals, showing your steps along the way.
P(_____ ≤ P ≤______ ) = P(_____ ≤ z ≤ ______ ) = _________ - ___________ = ____________

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Check My Work (1 remaining) A market research firm conducts telephone surveys with a 38% historical...
Check My Work (1 remaining) A market research firm conducts telephone surveys with a 38% historical response rate. What is the probability that in a new sample of 400 telephone numbers, at least 150 individuals will cooperate and respond to the questions? In other words, what is the probability that the sample proportion will be at least 150/400 = .375 (to 4 decimals)? Use z-table.
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 16 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are H0:μ=16H0:μ=16 vs. Ha:μ>16Ha:μ>16 1. Identify the consequences of making a Type I error. A. The company does not charge the customer the premium rate when they should not. B. The company charges the customer the premium...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can...
Fowle Marketing Research, Inc., bases charges to a client on the assumption that telephone surveys can be completed within an average time of 15 minutes or less. If more time is required, a premium rate is charged. The testable hypotheses in this situation are H0:μ=15H0:μ=15 vs. Ha:μ>15Ha:μ>15 1. Identify the consequences of making a Type I error. A. The company charges the customer the premium rate when they should. B. The company does not charge the customer the premium rate...
Will rate, please and thank you! 9. Telephone Interviews: Survey The National Study of the Changing...
Will rate, please and thank you! 9. Telephone Interviews: Survey The National Study of the Changing Work Force conducted an extensive survey of 2958 wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample (The Wall Street Journal). In response to the question “What does success mean to you?” 1538 responded, “Personal satisfaction from doing a good job.” Let p be the...
1. Let x be a continuous random variable. What is the probability that x assumes a...
1. Let x be a continuous random variable. What is the probability that x assumes a single value, such as a (use numerical value)? 2. The following are the three main characteristics of a normal distribution. The total area under a normal curve equals _____. A normal curve is ___________ about the mean. Consequently, 50% of the total area under a normal distribution curve lies on the left side of the mean, and 50% lies on the right side of...
BridgeRock is a major manufacturer of tires in the U.S.. The company had five manufacturing facilities...
BridgeRock is a major manufacturer of tires in the U.S.. The company had five manufacturing facilities where tires were made and another 20 facilities for various components and materials used in tires. Each manufacturing facility produced 10,000 tires every hour. Quality had always been emphasized at BridgeRock, but lately quality was a bigger issue because of recent fatal accidents involving tires made by other manufacturers due to tread separation. All tire manufacturers were under pressure to ensure problems did not...
1. Let A denote the event that a particular stock outperforms the market and let B...
1. Let A denote the event that a particular stock outperforms the market and let B denote the event that the economy is experiencing rapid economic growth. Suppose that P(A) = 0.40, P(B) = 0.50 and P(A/B) is 0.20. Therefore, the two events A and B are probabilistically independent. True False 2. A manager estimates that demand for their company's product will increase within the next 2 quarters with probability 0.55. This is an example of a a. objective probability...
Question 21 Suppose a health insurance company is interested in carrying out an investigation as to...
Question 21 Suppose a health insurance company is interested in carrying out an investigation as to the annual expenditures per household on their healthcare costs. In order to most accurately report their figures, the company decides to ensure “virtual certainty” about their estimates by using a Z value of 3.0 for their calculations. The company conducts a SRS of 843 households and determines the sample average household expenditures on healthcare is $43,257.00. A) Assume the company uses a σ=$879.00. Calculate...
1. For a pair of sample x- and y-values, what is the difference between the observed...
1. For a pair of sample x- and y-values, what is the difference between the observed value of y and the predicted value of y? a) An outlier b) The explanatory variable c) A residual d) The response variable 2. Which of the following statements is false: a) The correlation coefficient is unitless. b) A correlation coefficient of 0.62 suggests a stronger correlation than a correlation coefficient of -0.82. c) The correlation coefficient, r, is always between -1 and 1....
An experiment was carried out to measure the effect of growth hormone on girls affected by...
An experiment was carried out to measure the effect of growth hormone on girls affected by a growth disorder called Turner’s syndrome. A total 68 girls participated in the study. Half of the girls were placed into the treatment group; these girls were given the active drug. The other half of girls were placed into the control group and were given a placebo with no active ingredients. Their heights were measured at the time the hormone was first administered and...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT