confident that the expected monthly withdrawals in a bank will be within a confidence interval of ± $500. Let us say that a study of a sample of clients indicates that the average withdrawals made by them have a standard deviation of $3500. If the bank has a total clients of only 120. What is the sample size? *

Q: If you know that Bob scored at the 70th percentile, and you know the mean and standard deviation of…

A: Given,If you know that Bob scored at the 70th percentileand you know the mean and standard…

Q: 2 4 8 10 11 12 13 ot Plot 2 3 4 8 9 10 11 12 13 LO

A: Formula Used: Sample standard deviation σ = ∑Xi-X2n-1 Where, X is sample mean  X = 1n∑Xi

Q: Assume that among the members of a men's gym, the distribution of body weights has a mean of 188…

A:

Q: We want to estimate the mean Midichlorian count for the population of Jedi. How many Jedi must be…

A: Givenconfidence interval(c)=95%Margin of error(E)=200population standard…

Q: The manager of a grocery store has taken a random sample of 100 customers.  The average length of…

A: Given data, n=100 mean(x)=3.1 S.D (s)= 0.5 test statistic=?

Q: What distribution is used in this chapter to make inferences for one population standard deviation?

A:

Q: imagine we have 4 observations. the values lie  0 - 25 (inclusive, and repeats are allowed).  What…

A: Solution-:We have 4 observations. the values lie  0 - 25 (inclusive, and repeats are allowed).  What…

Q: take random sample of 200 people from salinas and find that their average income is $48000 per year…

A: According to the provided information, Mean (μ) = 48000 Standard Deviation (σ) = 9000 Sample Size…

Q: You are a newsvendor selling San Pedro Times every morning. Before you get to work, you go to the…

A: The objective of this question is to determine the optimal number of newspapers to buy each morning…

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A: The sample mean and the standard deviation are μ = 80 and σ = 12 respectively.Let X denotes the…

Q: anic sells a brand of automobile tire that has a life expectancy that is normally distributee cee…

A: Given Mean=36000 Standard deviations=2600 Z=-1.282

Q: Assume that 26% of students at a university wear glasses. Suppose 300 students are randomly…

A:

Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…

A:

Q: Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2 and a…

A: From the given information X follows normal distribution with mean µ = 98.2 standard deviation σ =…

Q: How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working…

A: By using the provided information, We have 95% confidence level Margin of error = 4 Population…

Q: Suppose a population has a mean happiness score of 75 and a standard deviation of 15. Researcher A…

A:

Q: Do students who are members of fraternities or sororities have GPAS alfferent from the student body…

A: μ=2.59,s=0.34,x¯=2.47,n=123Decision rule: When p value< level of signicance,then reject the null…

Q: ​Full-time college students report spending a mean of 29 hours per week on academic​ activities,…

A: From the provided information, Mean (µ) = 29 hours Standard deviation (σ) = 4 X~N (29, 4) Here X be…

Q: find standard deviation if range is 3.

A: Given: Range = 3

Q: A population has a mean of 75 and a standard deviation of 15 you randomly sample nine people from…

A: Given population have mean 75 and standard deviation 15. A sample of 9 people from the population is…

Q: 1.2, 2.7, 5.3, 3.4, 4.1,4.6, 3.3, 2.6. Find the standard  deviation

A:

Q: ind standard deviatio

A: Provided data is, High school students across the nation compete in a financial capability challenge…

Q: Prestigious University desires to accept only the top20% of all graduating seniors based on the…

A: Given: μ=500σ=100 The top 20% is the cut-off score for the examination

Q: Fast Auto Service provides oil and lube service for cars. It is known that the mean time taken for…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: A population has a mean of 75 and a standard deviation of 15. You randomly sample 9 from the…

A:

Q: Entry to a certain University is determined by a national test. The scores on this test are normally…

A:

Q: The local police force gives all applicants an entrance exam and accepts only those applicants who…

A: The score that corresponds to the top 15% is, The Z-score that corresponds to the area 0.85 is…

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A:

Q: Suppose the average credit card debt for Americans is $7000 and is not normally distributed with a…

A: Given information:  Population mean (u) = $ 7000  Sample size (n) = 40 Sample mean (x) = $ 6500…

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

A: mean = 36000standard deviation = 2100

Q: A mathematics professor one to determine whether there is a different in the final average just…

A: Given claim: Determine whether there is a different in the final average just between the past two…

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

A: Answer Mean = 34000Standard deviation =2200

Q: there are 75 students in the class and 20 students are getting a+ grade in the class find the mean…

A: