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 95​% confident that his estimate is in error by no more than four 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: If you want a poll to have a margin of error of 2.84%, how large will your sample have to be?

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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: In a survey of 500 human resource professionals, 70% said that the appearance of a resume is very…

A: Use simple formula

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

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: Researchers asked 200 families whether or not they were homeowners and how many cars they had. Their…

A: We can answer the question from the table of data as below.

Q: In a survey, 100 people were asked if they smoke and whether or not they exercise regularly (more…

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: What is the percentile for Colorado, where 10.1% of the residents are aged 65 and olde

A: From the stem plot, we can see that only 4 of the 50 states (7.0%,8.8%,9.8% and 10.0%) having…

Q: The results for a survey of 120. students who were selected randomly are listed below: • 60 students…

A: Given Data: The number of students in the survey is: n=120 The number of students has cell phones…

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…

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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: Readers of the magazine Popular Science were asked to phone in (on a 900 number) their responses to…

A: Answer:

Q: A research report from an independent-measures study states that there are significant differences…

A: It is given that the numerator (treatments) degrees of freedom is 2 and the denominator (error)…

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 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: a nutritionist wishes to determine, within 3% the true proportion of adults who do not eat lunch. if…

A:

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: A politician is Interested in the proportion of voters in his district that think he is doing a good…

A: Given dataA politician is intrested in the proportion of voters in his district thet thinkhe us…

Q: Assume that 30% of city employees in Carson City ride the bus to work. Answer the following…

A:

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

A: Critical value: Here, α = 0.01. Using excel formula “=NORM.S.INV(1-(0.01/2))”, the critical value is…

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

A:

Q: pproximately 21% of music lovers like Country Music. Of those who do, 97% do not have mild brain…

A: Given Data: P( like country music)=0.21 P( do not have mild brain damage| like country music)=0.97

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: 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: If the proportion of Hs is .25 out of 200 flips, what is the p-value? Round

A: Here proportion of head in fair coin should be 0.5 So take hypothesis with proportion p is 0.5 or…

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: 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…