A programmer plans to develop a new software system. In planning for the operating system that he will​ use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99​% confident that his estimate is in error by no more than five percentage points?

Q: Suppose that a polling organization surveys n=400 people about whether they think the federal…

A:

Q: a. What are the estimated sales for the Bryne store, which has four competitors, a regional…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Q12. If 150 households were surveyed out of which 120 households have internet fiber cable, then…

A: Given Data: x=150-120=30 n=150

Q: The salesforce at a certain company successfully closed 94 out of 200 sales calls. What was their…

A:

Q: (a) What percent of respondents feel that their body weight is about right? (b) What proportion of…

A:

Q: A survey of 78 men found that 10 have a social media account. Another survey of 51 women found that…

A: Given Information: Women: Sample size (n1) = 51 Out of which X1 = 26 have a social media account.…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A:

Q: A movie club surveyed 300 high school students. The students were asked how often they go to the…

A: Total number of students = 300. Total number of students who watch drama movie = 129+45= 174. Total…

Q: 3. The front row of a movie theatre has 23 seats. If you were asked to sit in the seat that occupied…

A:

Q: n the table above, who had the highest average expenditure? who had the owest - eexpondituac?

A: Here  Expidenture of 4 different person is shown The last column shows the Avg Expedinture

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A:

Q: In a class of 95 students, the heights of two students were measured and found to be 165 cm. If this…

A:

Q: 13. Andi wants to know if there is a difference in income if he is studying and not attending…

A: Calculate the Sample means and Standard deviations for two groups

Q: Americans who believe the government should ensure basic health care is _________% with a margin of…

A:

Q: Linda Silbers is a social scientist studying voter opinion about a city bond proposal for a…

A: Given that the confidence level is 95%. margin of error (ME)=5%=0.05 Consider that the p=73%=0.73…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Solution: B. From the given information, confidence level is 0.99, p=0.92 and E=0.02.

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: The margin of error (E) is 0.04 and the confidence level is 0.90.

Q: A student would like to estimate the average number of text messages sent by cell-phone users in a…

A:

Q: When 500 junior college students were surveyed,120 said that they have previously owned a…

A: When 500 junior college students were surveyed,120 said that they have previously owned a…

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: Sample Size: The formula for the sample size is as follows: Here, zα/2 is the critical value at 99%…

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A:

Q: A programmer plans to develop a new software system. In planning for the operating system that he…

A: The margin of error (E) is 0.03 and the confidence level is 0.95.

Q: An event marketing executive thinks that the proportion of consumers who have seen his company’s…

A: In general terms, the larger the sample size n, the more precise of an estimate can be obtained of…

Q: Students in a small statistics class were asked which was their dominant hand and if they were in a…

A: Given,   Right Left Total STEM, Yes 6 1 7 STEM, No 7…

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Part…

A: Solution: a. Let X be the number of oil tankers that had spills and n be the number of tankers. From…

Q: software system. In planning for the operating system that he will​ use, he needs to estimate the…

A: Given that  Margin of error =E =5%=0.05

Q: Does it make sense ? Why or why not? A pollster plans to improve survey results by only conducting…

A: A pollster plans to improve survey results by conducting polls in which the margin of error is zero.

Q: 4. Ms. Ellis expected 50 families to attend parent-teacher conferences, but 60 families attended.…

A: To calculate the percentage error

Q: America OnLine published a survey question. Among the 2,300 Internet users who responded, 20%…

A: From the given information, America OnLine published a survey question. Among the 2,300 Internet…

Q: A recent poll of 700 people who work indoors found that 280 smoke. If the researchers want to be 98%…

A:

Q: The sample proportion Is defined as Multiple Choice x/n n!

A:

Q: Part B Which teacher was voted favorite by the greater number of students in the fifth-grade class?…

A: In the fifth grade Class, Total Number of students = 48 Total Number of girls = 25 Total Number of…

Q: (d) What percent of these Tampa, FL voters who identify themselves as conservatives are also in…

A:

Q: 5. A study attempted to estimate the proportion of Florida residents who were willing to spend more…

A: Population: Population consists of the complete subjects that are included in the study for making…

Q: Company X pays its 50 employees a mean monthly salary of Php19,500; a second company Y pays its 62…

A: Given that Company X pays its 50 employees a mean monthly salary of Php19,500; a second company Y…

Q: (d) Would it be unusual if the sample mean were less than $7700? (e) Do you think it would be…

A: As asked by you I have answered the question (d) and (e). Please find the explanation below. Thank…

Q: mr. One researcher wants to estimate the proportion of MU students who are vegetarian, 6 answered…

A: Sample size is 30. There are 6 students are vegetarians. The hypotheses are given below: Null…

Q: According to the Humane Society, 33% of households in the United States own at least one cat. You…

A: From the given information p Value is 0.092. We want to interpret it.

Q: A box truck rental service offers trucks in multiple sizes for people who are moving. If a 10-foot…

A: We have, a box truck rental service offers trucks in multiple sizes for people who are moving such…

Q: et's say scientists studied 880 people to determine the effects of a cholera vaccine, and the…

A: Given: 880 people  were studied to determined effecf cholera

Q: Determine whether or not proportions of voters favoring the democrat candidate were the same in both…

A: Given  p1=populaion proportion of voters favoring democrat candidate in Alabamap2=population…

Q: Suppose that a polling organization surveys n = 400 people about whether they think the federal…

A: Let p is  defined as the population proportion of people say that the government should provide aid…

Q: A manager for Shopee wants to determine the current percentage of Filipino adults who now use the…

A: The Cochran formula is used to determine the minimum sample size for the estimation of population…

Q: Find the sample proportion, p-hat. When 410 college students were surveyed,150 said they own their…

A: Sample Proportion  :  If repeated random samples of a given size n are taken from a population of…

Q: C1. A computer spam filter is 98% effective at sending spam emails to my junk folder, but will also…

A: Solution

Q: A study published in 1990 attempted to estimate the proportion of Florida residents who were willing…

A: Population:   It is nothing but the set of all items that are required for the specific study is…

Q: jocelyn estimates that a piece of wood measures 5.5 cm. if it actually measures 5.62 cm, what is the…

A: Given : Jocelyn estimates that a piece of wood is 5.5 cm. The actual measures 5.62 cm. The error is…

Q: According to the Business and Financial Times newspaper, through January 25, 2018, majority of…

A: Given that there are 162 companies. The number of companies showed beat estimates is 104. The number…