An online stock trading company makes part of their revenue from clients when the clients trade stocks therefore, it is important to the company to have an good idea of how many trades its clients are making in a given year. In a sample of 120 clients of an online stock trading company, the average number of trades per year was 82 with a standard deviation of 16. If you were to test the hypothesis that the average number of trades per year is different than the previous year when the average number of trades was 85 (using the 5% level of significance), what is p-value for this test? (please round your answer to 4 decimal places)

Q: A scrap metal dealer claims that the mean of his sales is “no more than $80,” but an Internal…

A: Given that, Mean= 91 Standard deviation, sigma= 21 Sample size, n=20 Hypothesis,  Ho:  the agent’s…

Q: Find the proportion of customers who use ATMs less than times 55. Use four decimal places for your…

A: It is given that  From first data: Mean, μ = 40 Standard deviation, σ = 11.3   From second data:…

Q: A car insurance company tells its prospective customers that they can save an average of at least…

A:

Q: In 2011, the national percent of low-income working families had an approximately normal…

A: Thank you for posting this question! Since this question contains multiple sub-parts, I will solve…

Q: An online stock trading company makes part of their revenue from clients when the clients trade…

A: We have given that  Sample size n=83 , sample mean = 90 Standard deviation = 15  Population mean =…

Q: A certain brand of tissues has 60 tissues in a standard box because the manufacturers believe that…

A: Given; mean=57S=16n=100 Null and alternate hypothesis is- H0:μ=60Ha:μ>60Level of…

Q: Atlantic Video, a small video rental store in Philadelphia, is open 24 hours a day, and—due to its…

A: This is an example of M/M/1 queuing system. So let's see the notations used  in the…

Q: The former manager of the coffee shop in a local bookstore claimed that the mean daily sales were…

A: Givensample size(n)=11Mean(x)=2956.14standard deviation(s)=370α=0.01

Q: A business consultant wanted to investigate if providing day care facilities on premises by…

A: Obtain the 98% confidence interval for the difference between the two population means. The 98%…

Q: Suppose that Kitty studied for the Graduate Management Admission Test (GMAT) using a well-known…

A:

Q: According to the Institute of Medicine, the tolerable upper level of sodium intake for adults and…

A: Solution :  Given : μ = 2300 mg             n = 14             x¯ = 2310              s = 38 mg…

Q: A business consultant wanted to investigate whether providing daycare facilities on the company…

A: State the hypotheses. That is, there is no evidence that the mothers working at a company providing…

Q: How many degrees of freedom should they use in their calculations?   df=

A: Given : sample size, n = 15

Q: Question 20 State the appropriate hypotheses for this problem setting above. Question 21 Find the…

A: Question 20: Let μ1 denotes the mothers working at a company providing daycare facilities missed…

Q: Researchers are concerned about the impact of full-time college students working while they are…

A: Given information: Population standard deviation is, σ=5 hours The number of full-time college…

Q: We are trying to test whether, a new low fat diet actually helps obese people lose weight. 150…

A: Solution: Hypothesis testing:   From the above hypothesis test we can conclude that the low fat…

Q: According to the Runzheimer International, a typical business traveler spends an average of $281 per…

A: Here, µ = $281, σ = 47, and n = 65.

Q: Researchers are concerned about the impact of full-time college students working while they are…

A: (1)given that,population standard deviation, σ =5sample mean, x =15size (n)=100

Q: A business consultant wanted to investigate whether providing daycare facilities on the company…

A: The aim is to check mothers working at a company providing daycare facilities will have less days…

Q: According to the U.S. Department of Agriculture, Alabama egg farmers produce millions of eggs every…

A:

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

A:

Q: In 2011, the national percent of low-income working families had an approximately normal…

A: Given that, In 2011, the national percent of low-income working families had an approximately normal…

Q: In 2011, the national percent of low-income working families had an approximately normal…

A: From the given information, it can be observed that the population mean, μ = 0.313, population…

Q: A mechanic sells a brand of automobile tire that has a life expectancy that is normally​…

A: The mean is 34,000 and the standard deviation is 2400.

Q: The administrator at your local hospital states that on weekends the average wait time for emergency…

A: The one sample t-test has four main assumptions: The dependent variable must be continuous…

Q: In the general population, the average IQ score is 100 with a standard deviation of 15. A…

A: Note: As per our company guidelines, we are supposed to answer only the first three sub-parts.…

Q: The high school athletic director is asked if football players are doing as well academically as the…

A: Given : population mean , u = 3.10  population standard deviation, σ = 0.54

Q: Suppose that, in 1995, the weight of 16-year old males in the United States was normally distributed…

A: Null and the alternative hypothesis: The type of test is right tailed test The value of z-test…

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: A business consultant wanted to investigate whether providing daycare facilities on the company…

A: Hey, since there are multiple subparts posted, we will answer first three question. If you want any…

Q: A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: From the given information, let X be the weight of the cereal box. Number of cereal boxes randomly…

Q: A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

A: Given A cereal-packing company where the content of cereal boxes must have a mean of 368 grams and a…

Q: Statisticians determined that the mortgages of homeowners in a city is normally distributed with a…

A: Given distribution is normally distributed. Mean=250000 Standard deviation=50000 X~N(μ=250000,…

Q: Researchers are concerned about the impact of full-time college students working while they are…

A: It is given that , the researchers need to find out, on average, how many hours per week students…

Q: Researchers are concerned about the impact of full-time college students working while they are…

A: Given information: σ=5, n=100x¯=15 a) Use the excel formula, "=NORM.S.INV(0.995)" for determining…

Q: An auditor, pressed for time and on a low budget, is concerned with account errors on customer…

A: From the given information,Sample size = 25,Sample mean = -$23Sample standard deviation =$16

Q: A district councilor informs the prospective developer of a shopping centre that the average monthly…

A: Solution: Given information: n= 25 Sample size x = 2400 Sample mean μ= 2500 Population mean σ= 200…

Q: An electrical appliance made by company A has an average life of 2500 hours, with a standard…

A: Given : μ1 = 2500μ2 = 2300n1 = 300n2 = 200σ1 = 500σ2 = 800

Q: In 2011, the national percent of low-income working families had an approximately normal…

A: The given information is as following: Population mean μ=31.3% Population standard deviation σ=6.2%…

Q: In 2011, the national percent of low-income working families had an approximately normal…

A: Given information- Population mean, μ = 0.313 Population standard deviation, σ = 0.062 Sample size,…

Q: erik, a tourism expert, is researching the number of overnight stays at two large hotels. He…

A: From the given information, Consider, n1=30μ1=135s1=22n2=22μ2=142s2=18

Q: A consumer protection group suspects that a particular 285-gram packages of tofu actually weighs…

A:

Q: calculate (formula /values) The test statistic and the associated P value range from the table…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A consultant is tasked with studying the purchasing habits of customers in an Indonesian coffee shop…

A: Given : n(sample size)=68 =299000 rupiah s(sample standard deviation)=69000 rupiah   =274000…

Q: An online stock trading company makes part of their revenue from clients when the clients trade…

A: Givensample size(n)=98Mean(x)=85standard deviation(s)=17α=10%=0.10

Q: A realtor claims that in a certain neighborhood, the average house is worth $200,000. Having been…

A:

Q: An online stock trading company makes part of their revenue from clients when the clients trade…

A: In the given problem we have,  n = sample size = 120 The average number of trades per year was 82…