The Hilbert Drug Store owner plans to survey a random sample of his customers with the objective of estimating the mean dollars spent on pharmaceutical products during the past three months. He has assumed that the population standard deviation is known to be $15.50. Given this information, what would be the required sample size to estimate the population mean with 95 percent confidence and a margin of error of $2.00? A) 163 В) 16 C) 231 D) 68

Q: A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of…

A: According to the provided information, a nutritionist claims that the mean tune consumption by a…

Q: (a) Compute a 95% confidence interval for u, the population mean self-rated estimate of how many…

A:

Q: The dean of a business school claims that the average starting salary of its graduates is more than…

A: Claim: average starting salary of its graduates is more than 85

Q: In a sample size of 30, selected from a left-skewed population, the sample mean is 25 with a…

A: Given : n=30 , X-bar=25  , s=12 , μ0=22  Assume that , α=0.05 Here , you would use the t-test…

Q: b) Find the sample size needed for 99% confidence with a margin error wi +10W/m² and ±5W/m². Assume…

A: Margin of error is 10 and 5 σ=10α=0.01

Q: Suppose a population of rice grain sacks has a mean of 180 with a standard deviation of 50 kg. Using…

A: GivenMean(μ)=180standard deviation(σ)=50

Q: 2) A researcher used a developed problem-solving test to randomly select 50 Grade 6 pupils wherein X…

A:

Q: Use the given information to find the minimum sample size required to estimate an unknown population…

A: As per our guidelines we are suppose  to answer first question.

Q: We want to estimate the standard deviation of a normally distributed population via a…

A:

Q: 23. Make a conjecture about the relationship between og, ox, and N, where az is the standard…

A:

Q: In the statistical inference of two samples, the margin of error is obtained by O a. multiplying the…

A: In statistical inference of two samples ,the margin of error is obtained by multiplying the standard…

Q: Given that 40% of employed persons are in favour of the implementation of t h e flexi-week, in a…

A:

Q: The population standard deviation (σ) is necessary for conducting a ___________. A One-sample t…

A: A z-test is defined as a statistical procedure that is used to determine whether the sample mean…

Q: e of the test statistic for a test with a null hypothesis that mu = 98.6, Xbar = 99.4, the sample…

A: As the sample standard deviation is only known, we will use t test. The test statistic is calculated…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.9 pounds per year. A sample of…

A: Given information Sample mean x̅ = 3.6 Population mean µ = 3.9 Sample size = 80 Standard deviation =…

Q: A nutritionist dlaims that the mean tuna consumption by a person is 3.7 pounds per year. A sample of…

A:

Q: 1) A study of 29 female Sumatran elephants provided a 96% confidence t-interval for the mean…

A:

Q: For a population with o= 15, how large a sample would be needed to have a standard error of 3 points…

A:

Q: If the sample mean and sample standard deviation are found to be 90 and 15 respectively and the…

A: Given statement: Sample mean and sample standard deviation are 90 and 15. Sample size is n= 35 Then…

Q: Suppose that 31% of all births in a certain region take place by Caesarian section each year. a. In…

A: Let p be the probability that a birth is taken place by Caesarian section. Given that p = 0.31 Let X…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.2 pounds per year. A sample of…

A: Given: A nutritionist claims that the mean tuna consumption by a person is 3.2 pounds per year. A…

Q: A collar manufacturer is considering the production of new collars to attract young men. Thus…

A: Formula to find arithmetic meanx¯ is, x¯=∑fixiN where, xi=mid values             fi=number of…

Q: A major cab company in Chicago has computed its mean fare from O'Hare Airport to the Drake Hotel to…

A: According to Chebyshev's inequality at least 1-1k2 proportion of the data lie within μ±kσ values of…

Q: The central limit theorem states that if all possible random samples of sizeNare drawnfrom a…

A: Central limit Theorem: If we have a large enough sample , the distribution of sample is…

Q: In a random sample of size 58, 29 people say they generally get less than 8 hours of sleep a night.…

A: Formulae : Sample proportion = p^ = xn where , X is number of favorable outcomes n is sample size.…

Q: 1. Find the minimum sample size (n) you use to so that p is within a margin of error of 3% with a…

A: Sample size = sample size is the number of completed responses your survey receives or (randomly…

Q: The weights of all the players in the NBA have a distribution with an unknown shape but with a mean…

A: Answer - The weights of all the players in the NBA have a distribution with an unknown shape but…

Q: The National Weather Service says that the mean daly high temperature for October in a argemidwestem…

A:

Q: Can a normal approximation be used for a sampling distribution of sample means from a population…

A: Central Limit Theorem

Q: A scientist found that the time taken is M minutes, to carry out an experiment can be modelled by a…

A:

Q: A research worker wants to determine the average time it takes a mechanic to rotate the tires of a…

A: Given  alpha=0.05, sigma=1.5 MOE=0.3

Q: A radio station claims that the amount of advertising per hour af broadcast time has an average of…

A: Given: n= 1 hours ,x̄=7/60= 0.1167 hour ,σ=2.5/60=0.04167 hours µ=16/60=0.2667 hours

Q: If the sample mean and sample standard deviation are found to be 90 and 15 respectively and the…

A:

Q: Assume that Friday morning taxi-cab rides have times with a standard deviation of a = 10.1 minutes.…

A: From the provided information, Sample size (n) = 14 Sample standard deviation (s) = 12.6 Level of…

Q: A collar manufacturer is considering the production of a new style of collar to attract young men.…

A:

Q: The standard deviation of the sampling distribution of x, denoted is called the of the ..... The…

A: Given : Formula forsstandard error is

Q: For a population with o = 12, how large a sample is necessary to have a standard error that is less…

A:

Q: The distribution of life spans is approximately normal and u=40, how large a sample is required in…

A:

Q: Suppose that an airline uses a seat width of 16.1 in. Assume men have hip breadths that are normally…

A: From the provided information, Mean (µ) = 14.5 in Standard deviation (σ) = 1.1 in X~N (14.5, 1.1)…

Q: Suppose the germination periods, in days, for grass seed are normally distributed. If the population…

A: Solution: From the given information, confidence level is 0.90, σ=3 and E=1.

Q: In a population of 210 women, the heights of the women are normally distributed with a mean of 64.4…

A: Given Information : In a population of 210 women, the heights of the women are normally distributed…

Q: For a population with o = 12, how large a sample is necessary to have a standard error that is less…

A:

Q: Suppose that for a sample size of n = 9, we have 4; = 90 and E4 = 1700. Calculate the sample…

A:

Q: se the sample data set to evaluate each of the steps in determining the sample standard deviation…

A: Given sample data set 23 20 14 35 28

Q: A collar manufacturer is considering the production of new collars to attract young men. Thus…

A: From the given information, x Frequency, f fx 13 2 26 13.5 16 216 14 36 504 14.5 60 870…

Q: For the sake of argument, we begin by assuming that u equals 42, and we then attempt to use the…

A: Define a random variable X, that is the customer satisfaction rating of a randomly selected…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of…

A: GivenMean(x)=3.1standard deviation(σ)=1.02sample size(n)=80significance level(α)=0.06

Q: The mean length u of male geckos is 9.5 inches. A researcher studying a population of geckos in a…

A: Given: μ=9.5n=10 To find: The set of hypothesis that tests whether there is evidence that the mean…

Q: Suppose a baker claims that her bread height is less than 15 cm, on average. Several of her…

A: Given,sample size(n)=22sample mean(x¯)=13standard deviation(S)=1.2α=0.05

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.