A random sample of 99 customers produced the following 98% confidence interval for the proportion of customers who own a laptop : (9.5, 1.9). Identify the point estimate for estimating the true proportion of customers who own a laptop. Select one: O a. 5.70 Ob. 9.50 Ос. 3.80 O d. 1.90 O e. 11.40 е.

Q: Of the following, which is the smallest sample size that will result in a margin of error of 0.1…

A: It is given that Population SD = 1.5 Margin of error E = 0.1 Level of confidence = 99% The critical…

Q: If a retailer would like to estimate the proportion of their customers who bought an item after…

A: Given data,     P=58%=0.58     E=7%=0.07     z-value at 95% confidence is  zc =1.98     n=?

Q: a 99% confidence interval

A: Confidence interval :  Confidence interval measures the degree of uncertainty. or it is the…

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A: It was found that out of the 1013 adults from country A, 33% of the adults say national identity is…

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Q: The management of a large national chain of 20 motels, each with 100 rooms, decided to estimate the…

A: Given Information: Sample size (n) = 31 Sample mean (x¯) = 28.10 Sample standard deviation (s) =…

Q: The research group asked the following question of individuals who earned in excess of​ $100,000 per…

A: use Excel function =NORMSINV(α/2)

Q: The research group asked the following question of individuals who earned in excess of $100,000 per…

A: The random variable percentage of who believe it is morally wrong for unwed women to have children…

Q: For a research, let's consider the 10-unit sample with s = 32,866 as a preliminary example. For a…

A: Given data,s=32866E=10z-value at 95% confidence is Zc=1.96n=?

Q: In order to estimate the proportion of entering students who graduate within six years, the…

A: Solution: Let X be the number of students who graduate within six years and n be the sample number…

Q: (a) Construct a 95% two-sided confidence interval on mean compressive strength. (b) Construct a 99%…

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Q: A random sample of 10 regions in New England gave the following violent crime rates (per million…

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Q: Gosset used the following data set, which gives the additional sleep in hours obtained by a sample…

A: Given, n = 10 We have to obtain a 95% confidence interval for the given data

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Q: Two men, A and B, who usually commute to work together decide to conduct an experiment to see…

A: Let d= X (route I travel time)−(route II travel time)d=(route I travel time)− Y (route II travel…

Q: From 120 mass produced parts, 10 pieces do not follow the specified weight. Construct a 95%…

A:

Q: 2. The population of SULU Hornbill ( one of the endangered bird species in the Philippines) has a…

A: In testing of a hypothesis, Confidence interval is an interval such that the probability of the…

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Q: A researcher constructed a 95 percent confidence interval for the mean number of alfalfa weevils on…

A: The 95% confidence interval for the population mean is (1.50, 3.50)

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A:

Q: Make a 95 % confidence interval for the mean of time spent per week by all adults on sport…

A: Given X 45 12 31 16 28 14 18 26

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A:

Q: (a) Construct a 95% two-sided confidence interval on mean compressive strength. (b) Construct a 99%…

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Q: The following are body mass index (BMI) scores measured in 12 patients who are free of diabetes and…

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Q: Fifteen Smart Cars were randomly selected and the highway mileage of each was noted. The analysis…

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A: It is given that sample size (n) is 360 and x is 240.

Q: After Texas A&M lost again to their rival, the University of Texas, in a football game, the A&M…

A: As nothing is given , p = 0.50

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Q: 1. A recent survey showed that from a sample of 500 packages delivered by a Postal Service, 480 were…

A: We have given that  Sample size n= 500 , favorable cases x=480 Sample proportion p^=x/n=…

Q: Construct a 95% confidence interval for the population proportion of students who graduate within…

A: The sample size is n = 400 And the number of students who graduate within six years, X = 108 The…

Q: 2. The population of SULU Hornbill ( one of the endangered bird species in the Philippines ) has a…

A: Given that  sample size=n=150 sample mean=X¯=65 population standard deviation=σ= 40 confidence…

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Q: 11th - It was observed that 30 out of 100 randomly selected students smoked. Estimate the 95%…

A: we associate with the interval estimate is called confidence interval. This probability indicates…

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Q: For the same sample statistics, which level of confidence would produce the widest confidence…

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Q: To find the proportion of San Diegans subscribed to Disney+ in 2019, a researcher randomly selected…

A: Given: p=population proportionp^=101200n=200α=0.05z=1.96

Q: The birth weights of a sample of newborns were recorded for a group born to mothers who did not get…

A: Solution; The 93% confidence interval for the difference in μ1-μ2 is ( -2.12 pounds , -0.89 pounds)…

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: Given that  p^1=7.8%=0.078p^2=8.7%=0.087n1=11937n2=4892p^=n1p^1+n2p^2n1+n2=0.0806 Confidence…

Q: % confidence interval for the true population

A: Given Data Sample Size, n = 31 Number of successes, x = 15.0 Significance level,…

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A: The margin of error for population mean is positively related to the confidence level and negatively…

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.