an article in Forbes magazine reported that 73% of fortune 500 companies have Twitter accounts. A economist thinks the percentage is higher at technology companies .she sample 70 technology companies and finds that 55 of them have Twitter accounts .can she conclude that more than 73% of technology companies have twitter accounts? Use the a=.05 level of significance

Q: According to a survey of 5041 Star Trek fans conducted in 2010, 2873 are females. Use this data to…

A: Null Hypothesis: H0: p<=0.5 Alternative Hypothesis: H1:p>0.5 Given that x=2873 and n=5041…

Q: A report statesb that 45% of home owners had a vegetable garden, how large a sample is needed to…

A: Answer: From the given data, population proportion (P) =45% = 0.45 Margin of error (ME) = 6% = 0.06…

Q: central airlines claims that the median price of a round-trip ticket from chicago, illinois, to…

A: Sample size(n)=25 Median price=606 The number of tickets below $606 =11

Q: A college is considering the option to include plus and minus in the school's letter grading system.…

A: Given Information :  A college is considering the option to include plus and minus in the school's…

Q: The proportion of individuals in the United States who reported being “very happy” in 2014 was…

A:

Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: In the 2019 P&G color report, it was stated that 23% of cars in North America are wnite. TOu wonder…

A: The test hypotheses are given below:

Q: Professors collected data consisting of eye color and gender of statistics students. Among 950 male​…

A: Given that, For males:  X1= 372 and sample size n1= 950  p1^ = X1/n1 = 372/950 =0.3916 For females:…

Q: In 2011, a U.S. Census report determined that 65% of college students are working students. A…

A: 1. Determine the test statisticz = -0.58 2. Find the p-valueP-value = 0.5615 Explanation:Step 1:…

Q: Use critical thinking to list at least three things wrong with this survey. Explain fully using…

A: Given information: The results of online survey are given.

Q: A researcher made a survey regarding the proportion of male and female college students who dropped…

A:

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: Anna is 3 years old and in the 42nd percentile for height in her age group. What does this mean?…

A: Given: 1)Anna is 3 years old and, 2) In the 42nd percentile for height in her age group. In the…

Q: Out of a sample of 38 people, 23 people enjoyed biking and 15 enjoyed running. Test the claim that…

A: Given that,  x = 23, n = 38 The sample proportion of people prefer biking is, Null and alternative…

Q: Use the Plan, Solve and Conclude steps in answering this question

A:

Q: The Coca-Cola Company reported that the mean per capita annual sales of its beverages in the United…

A: Mean(x)=460.4 standard deviation(s)=101.9 sample size(n)=36

Q: A professional marketing survey involves product recognition in New York and California. Of 558 New…

A: We have to test claimm..

Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: Since we only answer up to 3 sub-parts, I'll answer the 1st 3 sub-parts. Please resubmit the…

Q: In a survey, respondents were asked to disclose their political affiliation (Democrat, Independent,…

A: Step-by-step software procedure to obtain count using EXCEL is as follows: Choose Insert >…

Q: Many people now turn to the internet to get information on health related topics. A research article…

A: Given information:

Q: Last year, 41% of business owners gave a holiday gift to their employees. A survey of business…

A: Given Information : Population proportion , p = 0.41. Sample proportion , p⏞ = 0.32. Number of…

Q: Out of 3,900 colleges surveyed, 50% reported that SAT scores were not used as a high consideration…

A:

Q: reporter has claimed that the majority of Colleges in the United States are Private For-Profit…

A:

Q: Joon believes that 50% of first-time brides in the United States are younger than their grooms. She…

A:

Q: A new study followed 483 workers after someone exposed to her first factor and others were not. Of…

A: Given that:   Cancer No Cancer Total Exposed 40 172 212 Non Exposed 18 253 271 Total 58 425…

Q: reasons, calf dehorning has become a routine practice at dairy farms. A report by a continental…

A: Answer The sample size [n] =635The favorable cases [x] = 513The population proportion [p] = 0.80

Q: o dream in black and white is greater than the proportion for those under 25. Complete parts (a)…

A: We have given that  Sample size n1 = 320 , n2= 306  Favorable cases x1= 74 , x2= 15…

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

Q: A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana…

A: Given,n=400x=144p^=xnp^=144400=0.36

Q: A research scientist wishes to test the claim that the mean number of children per classroom in…

A: Suppose xi, (i=1,2,...,n) be the random sample of size n taken from the normal population with mean…

Q: A professor using an open source introductory statistics book predicts that 15% of the students will…

A:

Q: A lecturer would like to analyse whether there is a relationship between the country of origin of…

A: Population is the set of all units of interest. Sample is a subset of the population. In real life…

Q: A poll asked college students in 2016 and again in 2017 whether they believed the First Amendment…

A: It is given that-Number of students surveyed in 2016:People who believed the claim: Number of…

Q: marketer belive that 92% of adult in germany own a cell phone . a cell phone manufacture believes…

A: Given: p0=0.92x=174n=200p⏜=174200p⏜=0.87α=0.05

Q: The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is…

A: Given,n=321x=22p^=xnp^=22321=0.0685α=0.01

Q: x Resorts & Spas, a magazine devoted to upscale vacations and accommodations, published its…

A: Given: N=20

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: Is the proportion of twin births among teenage mothers different from the overall figure?

A: It is given that Sample size n = 469 Number of twin births, X = 7 Level of significance = 10% = 0.10

Q: Claim: Fewer than 93% of adults have a cell phone. In a reputable poll of 1096 adults, 85said that…

A:

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.