what is your conclusion concerning the null hypothesis?

Q: In a recent year, the scores for the reading portion of a test were normally distributed, with a…

A: Mean is 20.4 and the standard deviation is 6.5.

Q: A researcher claims that the stomachs of blue crabs from Location A contain more fish than the…

A: Level of significant = 10%  Here we use the two sample mean t test to solve this problem.

Q: A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive…

A: For the given data Perform one sample t test

Q: Suppose that the sample dataset of July 1 temperatures consisted of 64 observations and that these…

A: given data standard deviation s = 4 sample size n = 64

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A: Answer: X ~ Normal distribution X~ N (μ, σ) The given values are Mean = μ = 40 Standard deviation= σ…

Q: In determining automobile mileage ratings, it was found that the mpg (x) for a certain model is…

A: Given that, Mean = 32 Standard deviation = 1.3

Q: 3. The average age of the marketing executives in an ad agency is 26, with a standard deviation of…

A: Note : Since you have asked multiple questions, we will solve the first question for you. If you…

Q: An article in American Demographics claims that more than twice as many shoppers are out shopping on…

A: GivenMean(μ)=180standard deviation(σ)=20

Q: Subjects in a study by Dabonneville et al. (A-9) included a sample of 40 men who claimed to engage…

A: From the provided information, The hypotheses can be constructed as: H0: µ1 = µ2 H1: µ1 < µ2…

Q: A researcher claims that the stomachs of blue crabs from LOcation A contain more fish than the…

A:

Q: Please see attached.

A: (a). It is given that:

Q: A sample of 100 cars driving on a freeway during a morning commute was drawn, and the number of…

A: Introduction: For a random variable X having k values, the ith observation of which is xi and…

Q: A shareholders' group, in lodging a protest, claimed that the mean tenure for a chief executive…

A: Given information- Population mean, μ = 9 years Sample size, n = 95 Significance level, α = 0.01…

Q: Suppose that 100,000 recent grads have starting salaries which are normally distributed with a mean…

A: Given that  μ=120,000σ=20,000 b) Consider the probability that the salary above $131,200 is,…

Q: A researcher claims that the stomachs of blue crabs from Location A contain more fish than the…

A: Given information

Q: Nationally, patients who go to the emergency room wait an average of 6 hours to be admitted into the…

A: Given,sample size(n)=13sample mean(x¯)=8.6sample standard deviation(s)=2.9population mean(μ)=6and…

Q: Again, suppose we are now interested in taking random samples of 800 US adults instead of 150 and…

A: We know that,  Proportion p= X/n Where n is sample size.

Q: In a certain supermarket, a sample of 60 customers who used a self-service checkout lane averaged…

A: Introduction: Assume that the checkout times of the customers are independent of each other, between…

Q: A car dealership looks back at their previous year’s sales records. Last year, the dealership sold…

A:

Q: Suppose I surveyed a random sample of commuters who had jobs in Manhattan, 51 whose primary mode of…

A: Given that                  We have to find  (a) The question of interest is whether the mean…

Q: The following care grade point averages measured in a sample of 8 undergraduate students who are…

A:

Q: Given a mean price of a residential real estate sales of KD 527,000 and a standard deviation of KD…

A: To find the probability of: a) having a sale above KD 550,000 b) having a sale below KD 527,500

Q: For a certain drug, based on standards set by the United States Pharmacopeia (USP) - an official…

A: given  For a certain drug, based on standards set by the United States Pharmacopeia (USP) - an…

Q: According to the Annual survey of drugs expenditure in country X, the annual expenditure for…

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you…

Q: the average hardness of tablets is centered on the target of 6 kp, while LCL and UCL are 5 and 7…

A:

Q: Suppose a real estate agent is interested in comparing the asking prices of condos in Montreal and…

A: The confidence interval is the interval range that helps to understand whether the test is…

Q: An article in American Demographics claims that more than twice as many shoppers are out shopping on…

A: Let X be the random variable from normal distribution with mean (μ) = $180 and standard deviation…

Q: A researcher claims that the stomachs of blue crabs from Location A contain more fish than the…

A:

Q: a florist ahs a floral shop  in miami  and anotherin san diego. Teh miami shop has a mean daily…

A: We need to compute the z-score to find out which store had the better sales.

Q: For a certain drug, based on standards set by the United States Pharmacopeia (USP) - an official…

A: Given: x¯= 99.9 The point estimate is sample variance, s = 1.01 n = 125 Confidence level = 95% and ∝…

Q: The U.S. Department of Transportation provides the number of miles that residents of the 75 largest…

A: There are two independent populations. Those which are named as Buffalo residents and Boston…

Q: years. A survey of companies reported in The Wall Street Journal found a sample mean tenure of x =…

A: (a)   The following null and alternative hypotheses need to be tested: Ho: \muμ ≥ 99 Ha: \muμ <…

Q: that empty homes are not as appealing to buyers as staged homes and, therefore, sell for lower…

A: The following information has been provided: Sample Mean 1 (\bar X_1)(Xˉ1​) = 150000150000…

Q: fuel consumption- the standard deviaton of fuel consumption of a manufacturers sports utility…

A: The sample size, n is provided as 18. The null and alternative hypotheses are;

Q: newspaper reporter is writing an article on employment status for young people who don’t have a high…

A: Given that  Sample size n =24 Sample mean =24970 Sample standard deviation =2300

Q: The 2019 General Social Survey asked a number of teenagers from different countries how much time…

A: To check if there is a larger variety of TV watching times for teenagers in the United States is…

Q: The article “Wired: Energy Drinks, Jock Identity, Masculine Norms, and Risk Taking” (K. Miller,…

A: In a sample of 413 male college students, the average number of energy drinks consumed per month was…

Q: Suppose population 1 is all blue cars sold at used car auctions, and the mean sale price of all such…

A: Given  Sales of red cars and blue cars and few other parameters.we need to find whether it has 2…

Q: The average undergraduate cost for tuition, fees, and room and board for two-year institutions last…

A: Given, n =  μ = 13252x¯ = 15560s = 3500α = 0.01

Q: The hotel industry has been greatly impacted by the COVID-19 pandemic. Suppose that traditionally…

A:

Q: For a certain drug, based on standards set by the United States Pharmacopeia (USP) - an official…

A:

Q: A certain company intends to market a weight-loss pill. They test it on a group of 2000 volunteers,…

A: The following data is given for the samples. Sample 1: n1=1000, x¯1=10, s1=6 Sample 2: n2=1000,…

Q: The following are grade point averages measured in a sample of 8 undergraduate students who are…

A: Solution: Let X be the grade point average. The given data is 3.28, 2.97, 3.05, 3.61, 3.39, 2.95, 3…

Q: Consider the following service system. The average inter-arrival time is 10 minutes, and the…

A: Data Given: The arrival Rate is 10 minutes. Service Time is 5 minutes.

Q: stimate for the average weekly income of all the computer programmers in Houston? 2. What is the…

A: The point estimate for the average weekly income of all the computer programmers in Houston is the…

Q: Subjects in a study by Dabonneville et al. (A-9) included a sample of 40 men who claimed to engage…

A:

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A: Given: Mean μ=68.4 Standard deviation σ=4.0   a) Calculate the probability that the study…

Q: A researcher claims that the stomachs of blue crabs from Location A contain more fish than the…

A: Introduction: Denote μ1, μ2 as the true population mean weights of fish in the stomachs of blue…

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.