According to Nielsen Media Research, of all the U. S. Households that owned at least one television set, 83% had two or more sets.  A local cable Company canvassing the town to promote a new cable service found that of the 300 randomly selected households visited, 240 had two or more television sets.  At  , is there sufficient evidence to conclude that the proportion is less than the one in the report?

Q: A university dean is interested in determining the proportion of students who recieve some sor of…

A:

Q: In a survey of 1000 women age 22 to 35 who work full time, 540 indicated that they would be willing…

A: Given that, x=540,n=1000 The sample proportion is,

Q: In a random survey of 1,000 households in the United States, it is found that 29 percent of the…

A:

Q: In an attempt to document the percentage of teenagers in the United States who play video games for…

A: The process of drawing conclusions about the population parameters by using the sample statistics,…

Q: Because of the increased cost of housing, a national real estate board wants to compare the…

A: From the provided information, the hypothesis, that if two proportions, i.e., the proportion of…

Q: In a previous poll, 32% of adults with children under the age of 18 reported that their family ate…

A: Given: p0=0.32n=1115

Q: In a survey of 399 randomly selected households conducted in the U.S., it was found that 158 of the…

A: Given, The objective is to find the best point estimate of the proportion of households that have…

Q: Last year, television station WXYZ's share of the 11 P.M. news audience was approximately equal to,…

A: Introduction :-  Given :-  Surveyed a random sample of 400 11PM news viewers and found that 146…

Q: In a study of teen cell phone use, 117 high school students were observed as they drove out of their…

A: Solution Given out of 117 students drive their vehicles to school and 46 were taking on their…

Q: In 2000, 58% of females aged 15 and older lived alone, according to the U.S. Census      Bureau. A…

A: State the hypotheses. That is, there is no sufficient evidence to conclude that proportion has…

Q: A food service director for a national corporation suspects that people are more likely to order…

A: a) Null Hypothesis: H0: The salad sales are not uniformly distributed across the days of the week.…

Q: A researcher wishes to estimate the number of households with two types of vegetables in their…

A:

Q: Because of the increased cost of housing, a national real estate board wants to compare the…

A:

Q: Of the 1,009 adults surveyed, 676 responded “yes.” In December 2007, 622 of 1,020 randomly selected…

A:

Q: A researcher is interested in determining if the proportion of children that collect specific type…

A: The null and alternative hypothesis is; H0: The proportion of children that collect a specific type…

Q: In a sample of 167 children selected randomly from one town, it is found that 37 of them suffer from…

A: Sample size n = 167 And number of children who suffer from asthma, X = 37 Let p be the proportion of…

Q: 2. Is there a difference in the proportion of individuals with food allergies between young children…

A: The sample proportions are The pooled proportion or weighted estimate of p is,

Q: A researcher is interested in determining if the proportion of children that collect specific types…

A: The given information is that the proportions of children, 36% of them collect Legos, 19% of them…

Q: According to the Government Accountability Office, 80% of all college students ages 18 to 23 nad…

A:

Q: A financial advisor believes that the proportion of investors who are risk-averse (that is, try to…

A:

Q: In 1949, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: Given: n1=1100x1=374p1=0.34n2=1100x2=330p2=0.30

Q: A newspaper article claims that 92 percent of teens use social media. To investigate the claim, a…

A: Conditions to use a one sample proportion z test: Conditions to use a one sample proportion z test :…

Q: 12. Researchers at VCU studied fatal auto accidents between cars in which one has an air bag and the…

A: The population proportion by the sample proportion is calculated using the formula where is the…

Q: Dr. House is leading a study to determine whether a new drug could significantly improve memory loss…

A: Dr. House is leading a study to determine whether a new drug could significantly improve memory loss…

Q: Many elementary school students in a school district currently have ear infections. A random sample…

A: Given X1=11 X2=12 n1=40 n2=30

Q: On a normal weekend, 15% of those attending Mass at a local Catholic church donate over $200 per…

A: Consider that pi’s are the proportion of the donations over $200 per week, between $100 and $200 per…

Q: A company manufactures cell phones. In August, a random sample of 125 cell phones was inspected, and…

A:

Q: In another Harris poll, adults were asked if they are in favor of abolishing the penny. Among 200…

A: From the given information,                        Sample size (n) =200 Probability of success…

Q: In a survey, 716 out of 1132 randomly selected adults in the United States said that they use cell…

A:

Q: In a random sample of 207 potential voters registered in the state of Mississippi, 62 indicated that…

A:

Q: A national publishing house claims that 35% of all weekly magazine readers in South Africa read…

A: Given: Significance level = 0.05, Population proportion = p = 0.35, Sample size  = n = 500, Number…

Q: In a poll conducted March 17-21, 2005, by the Pew Research Center for the People and the Press, a…

A:

Q: According to a recent poll, 53% of Americans would vote for the incumbent president. If a random…

A: Null hypothesis : H0 : μ = 0.53 Alternative hypothesis : Ha : μ ≠0.53 It is two tailed test.

Q: In examining the ability of users to complete a variety of information-seeking tasks on their mobile…

A:

Q: If you draw a random sample of 100 scores from a large population of test scores and compute the…

A: As we increase z value, corresponding probability of occurence decreases. hence, The event among…

Q: A manufacturer claims that at most 5 percent of thetime a given product will sustain fewer than…

A: Solution: A manufacturer claims that at most 5 percent of the time a given product will sustain…

Q: A survey is conducted to determine if there is a difference in the proportion of students, parents,…

A: Given info: Since P-value is greater than any reasonable significance level, there is not convincing…

Q: According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), and the National…

A: As per honor code, we will only answer first three questions: Given information: P=0.37n=364x=136 A)…

Q: A Gallup Poll taken in May 2000 asked the question: “In general, do you feel that the laws covering…

A: We have to construct ci.

Q: A. Since the sample sizes are both less than​ 30, it must be assumed that the samples are…

A: (a) Here the sample sizes are less than 30. so, we have to conduct a two-sample T-test  Assumptions…

Q: On a normal weekend, 14% of those attending Mass at a local Catholic church donate over $200 per…

A: Given : P(donate over $200) = 0.14 P(donate Between $100 and $200) = 0.26 P(donate less than $100) =…

Q: Because of the increased cost of housing, a national real estate board wants to compare the…

A: (a): Null hypothesis H0: proportion of rural areas = proportion of metropolitan areas H1: proportion…

Q: In a previous poll, 38% of adults with children under the age of 18 reported that their family ate…

A: Given, The sample proportion is, The null and alternative hypothesis is:

Q: In a previous​ poll, 37​% of adults with children under the age of 18 reported that their family ate…

A: Denote p as the true proportion of the adults with children under the age of 18 reported that their…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given: Confidence level=95%Margin of error E=2% From the Standard Normal Table, the value of z* for…

Q: In a commissioned study, 364 students are selected randomly from a list of all students enrolled at…

A: 1. The statistic for this sample is, p^=xn=136364=0.3736 Thus, the statistic for this sample is…

Q: In a certain school district, it was observed that 27% of the students in the element schools were…

A: The statement of the problem is “the proportion of only children in the special program is…

Q: Three random samples of sizes, 30, 48, and 32, respectively, are collected, and the three-sample…

A: It is given that there are three random variables and has three sample sizes defined as: n1-30 n2=48…

Q: 2. In a certain special education school, a sample of 144 students was chosen and among these, 48…

A: Claim : proportion of ADHD students in the school is not 0.40.

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.