The Bank of america trends in Consumer Mobility Report indicates that in a typical day,51% of users of mobile phones use their phone at least once per hour, 26% use their phonea few times per day, 8% use their phone morning and evening, and 13% hardly ever usetheir phones. The remaining 2% indicated that they did not know how often they usedtheir mobile phone (USa today, July 7, 2014). Consider a sample of 150 mobile phoneusers.a. what is the probability that at least 70 use their phone at least once per hour?b. what is the probability that at least 75 but less than 80 use their phone at least onceper hour?

Q: 8.104 Gas mileage of the Honda Civic. According to the Environmental Protection Agency (EPA) Fuel…

A: Given Information: Hypothesized value of the population mean is 36. Sample size n=50 Sample mean…

Q: Alcohol abuse has been described by college presidents as the number one problem on campus, and it…

A: We have given that,  Sample size (n) = 10904 and favorable cases (X) = 2486 Then,

Q: A survey of 2255 randomly selected US adults found that 51% said they know all or most of their…

A:

Q: The Australian sheep dog is a breed renowned for its intelligence and work ethic. It is estimated…

A:

Q: Wolak, Mitchell, and Finkelhor (2002) used a survey of 1,501 adolescents to examine online…

A: Research design can be broadly classified into two categories named quasi-experimental research…

Q: A researcher is interested in attitudes towards releasing prisoners with Alzheimer's who have a life…

A: below vocabulary word with its corresponding example

Q: The median number of part-time employees at fast-food restaurants in a particular city was known to…

A: The median number of part-time employees at fast- food restaurant is 18. There are 7 fast-food…

Q: Suppose that a poll taken 10 years ago found that 56% of parents spank their children. Suppose a…

A: It is given that 56% of parents spank their children.

Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…

A: Solution: Given information: n = 210 Sample size  p= 0.11 Population proportion

Q: In the NFL, Coaches can throw "challenge" flags if they believe officials have made an incorrect…

A: Given n(sample size)=316 x( no. of success) =154

Q: An economist believes that the median income of lawyers who recently graduated from law school is…

A: Given that, An economist believes that the median income of lawyers who recently graduated from law…

Q: A tire manufacturing company encourages its employees to promote a zero-accident environment by…

A: Given data: Shift Dangerous Conditions Employee Error Total Morning 5% 32% 37% Mid 6% 25% 31%…

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

A:

Q: Alcohol abuse has been described by college presidents as the number one problem on campus, and it…

A:

Q: Is drinking tea good for your health? Researchers in China studied a sample of 100,902 adults and…

A:

Q: p. A person with a serum cholesterol level igher than 200 mg/dL falls in a high-risk category for…

A: Fr the given information we find the probability.

Q: Construct a confidence interval to estimate the proportion of U.S. adults who ate healthy…

A: HERE AS PER guidelines  I HAVE CALCULATED 3 SUBPARTS PLZ REPOST FOR REMAININING    According to a…

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: A)Verifying the conditions:It is given that, the proportion of the American population who use only…

Q: A Harris Interactive poll reported that 32.4% of 275 randomly selected Americans living in the west…

A: Denote p1, p2 as the true population proportions of Americans living in the west and south,…

Q: The department of education ran a very comprehensive study in the 1990's to determine the GPA of…

A: Hi, since the problem posted by you contains multiple sub-parts, we are answering the first three…

Q: A student researcher was surprised to learn that the 2017 NCAA Student-Athlete Substance Use Survey…

A: Since the question to be answered is not specified, we'll be answering only the first question.…

Q: According to the FBI and the Justice Department, 70% of all arrests are of males aged 15 to 34…

A: The level of significance is 0.01 (=1%).

Q: Due to recent trends in the childcare industry, the firm suspects that the that the mean annual…

A: Solution: Given information: n1=20 Sample size of Illinoisn2= 20 Sample size of…

Q: After reading an article using research done by the Organization for Economic Co-operation and…

A: The 95% confidence interval for p is (0.25, 0.32).

Q: How do I examine whether there is evidence that, in the population from which the respondents were…

A: Given information: The statement is given related to checking the significance of the mean. Find:…

Q: In Pakistan, thousands of graduates got degrees from different universities every year. Most of them…

A: Given Data : City Jobless Rate (%) Crime Rate (%) Karachi 14 3 Lahore 21 4 Islamabad 16 2…

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: Solution:Part(D):Finding the test statistic value for the hypothesis test for…

Q: Omar is a human resources executive for a technology company. He is deciding between two types of…

A: a) Let 'μ1' represent the population mean of the yearly number of vacation days taken by workers…

Q: 2.Are babies born to mothers who use assistive reproduction technology (ART) more likely to be born…

A: Chi-Square Test of independence: The hypothesis testing for the independence is calculated with the…

Q: According to a home securities company, the highest percentage of home burglaries occur during the…

A: The critique of the study is invalid Since, the data is collected for 10 years of period and…

Q: More people are using social media to network, rather than phone calls or e-mails (US News & World…

A:

Q: 3. Determine the preferred measure of central tendency for the sample whose observations 18, 10, 11,…

A:

Q: Labor Day was created by the U.S. labor movement over 100 years ago. It was subsequently adopted by…

A: Given : sample size = n = 1000 x = 650 p^ = xn   = 6501000   = 0.65

Q: The National Technology Readiness Survey sponsored by the Smith School of Business at the University…

A: Denote p2009 and p2004 as the true population proportions of spam emails deleted by Americans in…

Q: A company is interested in seeing if the average call time to its call center is more than/greater…

A: A company is interested in seeing if the average call time to its call center is more than/greater…

Q: The lifetime of a light bulb is normally distributed with an average life of 500 hours and a…

A: Define the Random Variable, X : Life time of a light bulb. Given that , X ~ N(500,1002 )  So, Z =  X…

Q: A survey reported that 77% of registered voters in California approved of allowing two people of the…

A: given data  event A: approved of gay marriage event B : age between 18 and 39 years P(A) = 0.77 P(B)…

Q: The U.S. Census Bureau reported that in 2015, the proportion of adult Americans age 25 and older who…

A: a. The condition to be fulfilled for sampling distribution to be approximately normal is,

Q: sample of n = 80 C of I students found 16 with brown eyes. Give the numerical value of the statistic…

A: Sample size n=80Favorable cases=16

Q: ged? In on, 18% 2012, a school chelor's ached?

A: See hand written solution ,

Q: Suppose one of these persons is selected at random, compute P(C₂ or 1₂). Select one: O a. 0.571 O b.…

A: Given that   C2 = 665 , I2 = 334 C2 and I2 = 166

Q: 12.2.84 The number of successes and the sample size for a simple random sample from a population are…

A: Note:  Hey, since multiple questions are posted, we will answer first question for you. If you want…

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.