# A random sample of 1500 residential telephones in Phoenix found that 390 of the numbers were...

###### Question:

A random sample of 1500 residential telephones in Phoenix found that 390 of the numbers were unlisted. A random sample in the same year of 1200 telephones in Scottsdale found that 304 were unlisted. Round your answers to four decimal places (e.g. 98.7654). (a) Calculate a 95% two-sided confidence interval on the difference in the proportions of unlisted numbers between the two cities. -0.0336 sp1-p2s 0.0329 (b) Is there a significant difference between the two proportions at a = 0.05? No. (c) Calculate a 90% two-sided confidence interval on the difference in the proportions of unlisted numbers between the two cities. sp1-p2s 0.0275 Statistical Tables and Charts -0.0282

#### Similar Solved Questions

##### (1) (2) (3) (4) If the assets of a business are $280.000 and the abilities are... (1) (2) (3) (4) If the assets of a business are$280.000 and the abilities are $75,000, how much is the worse? If the owners' equity in a business is$100,000 and the Battles are $90,000, how much are the assets? A company reported total monthly income of$130.000 and expenses of $83.000 What is... 1 answer ##### 37. A researcher claims that the mean number of purchases made online from facebook ads per... 37. A researcher claims that the mean number of purchases made online from facebook ads per minute is more than 5,400. n=14, s = 75, xbar = 5500. Perform the appropriate hypothesis test at a significance level of 0.05. A) NEETS B) NEETR C) IEETR D) IEETS E) None of the Above 38. Find the population ... 1 answer ##### At December 31, 2018, the Accounts Receivable balance of Alpha Company is$180,000. The Allowance for...
At December 31, 2018, the Accounts Receivable balance of Alpha Company is $180,000. The Allowance for Bad Debts account has a$12,390 debit balance. Alpha Company prepares the following aging schedule for its accounts receivable: (Click the lcon to view the aging schedule.) Read the reauirements Req...
##### The probability of getting heads from throwing a fair coin is 1/2 The fair coin is...
The probability of getting heads from throwing a fair coin is 1/2 The fair coin is tossed 4 times. What is the probability that exactly 3 heads occur? 1/4 The fair coin is tossed 4 times. What is the probability that exactly 3 heads occur given that the first outcome was a head? 3/8 The fair coin is...
##### Explain economic principles and their applications in the real world. Summarize the different types of market...
Explain economic principles and their applications in the real world. Summarize the different types of market structures and the role of government in economics....
##### Activity 26-3. Compton scattering [Accompanies Section 26-3] In Compton scattering a photon collides with an electron...
Activity 26-3. Compton scattering [Accompanies Section 26-3] In Compton scattering a photon collides with an electron that is initially at rest. (a) Rank the following quantities in order from largest to smallest. If any two quantities are the same, state this. Explain how you made your ranking. (i)...
##### Middleton Associates is a consulting firm that specializes in information systems for construction and landscaping companies....
Middleton Associates is a consulting firm that specializes in information systems for construction and landscaping companies. The firm has two offices—one in Toronto and one in Vancouver. The firm classifies the direct costs of consulting jobs as variable costs. A segmented contribution format...
##### What influences did China have on Vietnam?
What influences did China have on Vietnam?...
##### A computer technician charges $40 for a house call and$38 per hour
A computer technician charges $40 for a house call and$38 per hour. The expression 40 + 38t is used to find the cost of a house call that lasts t hours. What is the cost of a house call that last 3 hours?...
##### A 35 year old man is sent to the emergency department by a homeless shelter caseworker...
A 35 year old man is sent to the emergency department by a homeless shelter caseworker after he has been coughing up blood. He has been living on the streets for the past 6 months following a release from a 3-year incarceration. He complains of night sweats and fever. On physical examination, his te...