In a random sample of 200 females and 100 males who watched a certain television program, 94 females and 34 males indicated they like it. A 95% confidence interval for the difference in proportions of all females and all males who watched the programme and liked it (rounded to three decimals) is:

Q: It was observed that 30 of the 100 randomly selected students smoked. Find the confidence interval…

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Q: A sample of 28 was taken from a population, and r = .45. What is the 95% confidence interval for the…

A: Correlation coefficient: Correlation analysis is used to measure strength of the association between…

Q: following is a 95% confidence interval for the proportion of all students at the school who ate…

A:

Q: The figure to the right shows the results of a survey in which 1013 adults from Country A, 1001…

A: Given data for country C is        n=1021        P=25%=0.25       Z- value at 95% confidence…

Q: The figure to the right shows the results of a survey in which 1013 adults from Country A, 1001…

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Q: An article in an educational journal discussing a non-conventional high school reading program…

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Q: nd a 90% confidence interval for for the probability of success θ in a Bernoulli trial with n=48.

A: Confidence interval: It is defined as the range that contains the value of the true population…

Q: In a study of 480 households, 168 households were found to have 4 cell phones. Find a 95% confidence…

A: Given: x=168 n=480 p^=xn=168480=0.35

Q: In the following data, where the highest possible score is 10. If the population standard deviation…

A: Solution: Given information: n= 30 Sample size  x = ∑xn=18830=6.2667 Sample mean σ= 1.9 Population…

Q: In a survey of 950 randomly selected individuals, 17% answered yes to the question "Do you think the…

A: Sample size, n = 950Probability = 17% = 0.17 90% confidence level

Q: In a random sample of 850​ Americans, 385 reported that they work two jobs. Which of the following…

A: The known values are, The sample proportion is,

Q: A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5…

A: Given data  4.5,5,5.5,6,6,7,7.5,7.5,8,9,5,7 n=12

Q: a 90% confidence interval for for the probability of success in a Bernoulli trial with n=48

A: Confidence interval: It is defined as the range that contains the value of the true population…

Q: 1. In a recent poll 62 out of 149 randomly chosen students at Allen High School say they plan to buy…

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Q: On the Navajo Reservation, a random sample of 228 permanent dwellings in the Fort Defiance region…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: In a random sample of 850 consumers. 385 reported that they were able to purchase a Playstation 5.…

A: According to the given information, we have In a random sample of 850 consumers. 385 reported that…

Q: The production manager in an automobile plant is concerned with the number of cars that do not pass…

A: Not acceptable = 120-92 = 28

Q: In an experiment of normal body temperatures in degrees Fahrenheit, 6 males ages 25-40 were given a…

A: The data set is: 97.1 99 98.2 98.9 98.1 99.4

Q: In a random sample of 500 people eating lunch at a cafeteria on various Fridays, it was found that…

A:

Q: Gallup is a company that carries out daily opinion polls on a variety of topics. In a recent daily…

A: The confidence interval can be found by using the formula p±zp(1-p)n

Q: An investigator has calculated a 95 percent confidence interval for a one-sample t test and found:…

A: The 95% confidence interval is obtained as (97, 105).

Q: A random sample of 242 elephants who are in a preserve in Kenya were selected and 85 identified as…

A: Obtain the 95% confidence interval for the difference between the proportions The 95% confidence…

Q: 1992, the women in two statistics classes for students in the liberal arts at a large northeastern…

A: In 1992, the women in two statistics classes for students in the liberal arts at a large…

Q: A random sample of records of 10 night shifts at the emergency section at the Nairobi hospital gave…

A: A confidence interval for a mean is a range of values that is likely to contain a population mean…

Q: A survey found that 33 of 66 randomly selected women and 37 of 66 randomly selected men follow a…

A:

Q: A random sample of 274 elephants who are in a preserve in Kenya were selected and 94 identified as…

A: The sample proportions are Critical values: By using the standard normal table of Z, the critical…

Q: In a 2009 Gallup Poll, 441 of 507 adults said it was “morally wrong” to clone humans. Assume Gallup…

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Q: An independent-measures research study uses a total of 18 participants to compare two treatment…

A:

Q: In a simple random survey of 89 students of faculty of medicine at the University of Jordan, 73 said…

A: It is given that out of 89 students, 73 said that Principles of Statistics was the most satisfying.…

Q: In a recent survey of US adults, 35 people were asked the question:   “Do you own a smart phone?”.…

A: Given data,n=35x=29Sample proportion p=xn=2935=0.83z-value at 90% confidence is Zc=1.645

Q: Of 380 randomly selected medical students, 21 said that they planned to work in a rural community.…

A: Note- Here I am taking the sample size as 380 because then only the answer will match with the given…

Q: * In a random sample of n = 300 families owning television sets in the city, it is found that x =…

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Q: (c) In a random sample of visitors to a famous tourist attraction, 252 of 750 American tourists and…

A: We have given that,  X1 = 252, n1 = 750 and X2 = 312, n2 = 500 Then,  We will find 96% confidence…

Q: A U.S. Food Survey showed that Americans routinely eat beef in their diet. Suppose that in a study…

A: Given, n1=49, x1=54.1, S1=7.0,  n2=64, x2=60.4, S1=8.0…

Q: Would you guess that people tend to buy more jeans when the weather is warm or when it is cold? The…

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Q: Give the margin of error for the 90% confidence interval for µd = µ1 – H2

A: The differences are 4, 6, 2. The mean is, d¯=∑dn=4+6+23=123=4 The standard deviation is,…

Q: An airline transports over 10 000 passengers daily, and the airline is curious what proportion of…

A:

Q: For a population data set sigma = 12.7 How large a sample should be selected so that the margin of…

A: Given that standard deviation (σ)=12.7Margin of Error (E)=3.20confidence level=0.96

Q: From a random sample of 100 women, 15 have dangerous reading blood sugar levels higher than 300…

A:

Q: 5. In a pre-election poll, a pollster finds that 552 out of 1025 people polled favor Smith.…

A: Given data: N = 1025 X = 552 Confidence level  = 95 %

Q: 12. In a sample of 500 Canadians, 275 say they would rather retire in the US than in Canada.…

A: From the given information, Consider, X be the random variable that denotes the number of people who…

Q: Based upon the results of the sample in #1, can you say with 95% confidence that your confidence…

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Q: In a recent poll, 19% of respondents answered option A. The margin of sampling error was plus or…

A: Given information- The percentage of the population answered A is, p = 19% The margin of error, E…

Q: A survey of a random sample of 256 college students found that 36% said they frequently experience…

A: For a known sample proportion, we want an interval to be estimated, which will include the true…

Q: In a random sample of 1250 adult drivers, 450 said that they would cut their driving by 10% if this…

A:

Q: A random sample of married people were asked "would you remarry your spouse if you were given the…

A: Given information x = 127 N = 150

Q: In a random sample of 512 hospital patients, 102 were readmitted within 30 days of discharge. A 90%…

A:

Q: In a study by Sallie Mae and Gallup, 323 of the 569respondents said that they paid for their…

A:

Q: Of 500 randomly selected college students, 200 use a particular brand of mobile phone. Assuming that…

A: Given : x = 200 n = 500 p^=xn=200500=0.4The formula for confidence interval is :p^±zcp^(1-p^)n