Math

StatisticsQ&A LibraryThe average amount of money spent for lunch per person in the college cafeteria is $6.82 and the standard deviation is $2.99. Suppose that 9 randomly selected lunch patrons are observed. Assume the distribution of money spent is normal, and round all answers to 4 decimal places where possible. What is the distribution of XXStart your trial now! First week only $4.99!*arrow_forward*

Question

The average amount of money spent for lunch per person in the college cafeteria is $6.82 and the standard deviation is $2.99. Suppose that 9 randomly selected lunch patrons are observed. Assume the distribution of money spent is normal, and round all answers to 4 decimal places where possible.

- What is the distribution of XX? XX ~ N(,)
- What is the distribution of ¯xx¯? ¯xx¯ ~ N(,)
- For a single randomly selected lunch patron, find the probability that this patron's lunch cost is between $7.585 and $8.7734.

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: What is the answer?

A: Given information a) n = 350; p̂ = 0.30, α = 0.01

Q: Consider the following data coming from a study of three different groups. For this question, assume...

A: Given information Group 1 Group 2 Group 3 1 5 6 3 3 4 3 4 6 1 ...

Q: 4. 15 healthy adult subjects were asked to walk on a treadmill while connected to monitors. One of t...

A: (a) State the hypotheses. There is no evidence to conclude that mean effect of the first disturbanc...

Q: A box of chocolates should weigh 16.4 ounces. A sample of 40 randomly selected boxes had a mean weig...

A: The sample size is 40, sample mean is 16.6, sample standard deviation is 0.4, and population mean is...

Q: Hi can i get some help in answering the question below please. Show calculations along and explanati...

A: Let X be the random variable denotes that the length of the phone call in minutes It is given that X...

Q: On its municipal website, the city of Tulsa states that the rate it charges per 5 CCF of residential...

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we ca...

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the...

A: a. Since the population standard deviation is unknown, the appropriate test is one sample t-test. ...

Q: Consider the following hypothesis test. HoiH2 70 HaiH< 70 A sample of 100 is used and the population...

A: Here, the population standard deviation is 12.So, the statistic is given by, Z = x - 7012100 = x - 7...

Q: In the past, 74% of the tourists who visited Chattanooga went to see Rock City. The management of Ro...

A: Click to see the answer

Q: What statistical test is most appropriate for comparing the proportions of two categories of two ind...

A: Z-test for two sample proportion is most appropriate to compare the proportions of two categories of...

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good b...

A: State the hypotheses. That is, there is no evidence to conclude that proportion of stocks that went...

Q: In a recent survey of high school students, it was found that the average amount of money spent on e...

A: Click to see the answer

Q: problem attached. please help me with the full solutions, and matrixes in beginning.

A: Null Hypothesis H0 Infant is fed and autism is independent Alternative Hypothesis Ha I...

Q: Conduct a test at the α=0.01 level of significance by determining (a) the null and alternative hyp...

A: Given, α=0.01 level of significance The sample data are: x1=129, n1=241, x2=139, n2=312...

Q: The average amount of money spent for lunch per person in the college cafeteria is $5.96 and the sta...

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we ...

Q: Out of 100 people sampled, 79 had children. Based on this, construct a 99% confidence interval for t...

A: a) One of the assumptions for constructing confidence interval for population proportion is sample s...

Q: Retention Test Scores A sample of non-English majors at a selected college was used in a study to se...

A: Click to see the answer

Q: Write the binomial probability and the normal probability for the shaded region of the graph. Find t...

A: Given, n = 16 p = 0.55

Q: A researcher is conducting a Chi2 for Independence test to evaluate a relationship between gender (i...

A: State the hypotheses. Null hypothesis: Alternative hypothesis:

Q: Suppose a life insurance company sells a $290,000 1-year term life insurance policy to a 20-year-...

A: Given that : A life insurance company sells a $290,000 1 -year term life insurance policy to a 20 -...

Q: A medical center, with 75,000 charts on file, has established that a chart should be located within ...

A: Total number of chart requests in a month = 675 Number of charts located within the quality standard...

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers be...

A: Click to see the answer

Q: The amount of coffee that people drink per day is normally distributed with a mean of 17 ounces and ...

A: 1. It is given that the amount of coffee that people drink per day follow normal distribution with m...

Q: A psychologist examined the effect of chronic alcohol use/abuse on memory. In this experiment, a typ...

A: From the provided information,

Q: A university dean is interested in determining the proportion of students who recieve some sor of fi...

A: Click to see the answer

Q: 3. Given the data table below answer the questions that follow. Price per unit 5 10 15 20 25 30 ...

A: Let X represents the Price per unit Y represents weekly profit in thousands a. Find the best fit q...

Q: The records of a casualty insurance company show that, in the past, its clients have had a mean of 1...

A: Given, The records of a casualty insurance company show that, in the past, its clients have had a me...

Q: 4. 15 healthy adult subjects were asked to walk on a treadmill while connected to monitors. One of t...

A: a) State the hypotheses. There is no evidence to conclude that mean effect of the first disturban...

Q: Profit 19,449 0 42,877 13,738 17,843 87,256 41,825 7,655 20,011 51,420 53,37...

A: The descriptive analysis is conducted using EXCEL. The software procedure is given below: Enter the...

Q: Find a 99% confidence interval for the population mean age of the Smurfs, if a sample of 50 smurfs h...

A: Click to see the answer

Q: I will flip two coins if both coins come up tails I will pay you 6$ If one shows heads and one shows...

A: Given information Two coins are tossed. Frequency table is shown below X P(X) XP(X) ...

Q: UPS currently believes that it achieves a 96 % on-time performance for its customers. A random sampl...

A: Click to see the answer

Q: In a large section of a statistics class, the points for the final exam are normally distributed, ...

A: Given Information : In a large section of a statistics class, the points for the final exam are no...

Q: The wait time at a drive-through fast-food restaurant has a standard deviation of 18.0 seconds. Use ...

A: Given that, The wait time at a drive-through fast-food restaurant has a standard deviation of 18.0 s...

Q: Suppose we identify 50 women 50 to 54 years of age who have both a mother and a sister with a histor...

A: Given information Total Women n = 50 No of women having breast cancer x = 5

Q: Show work please thank you :) The mean rate for cable with internet from a sample of households was ...

A: Click to see the answer

Q: An article presents a new method for timing traffic signals in heavily traveled intersections. The e...

A: Given information- Sample size, n = 50 Sample mean, x-bar = 653.2 vehicles per hour Sample standard ...

Q: If P(A) =0.55 and P(A and B) =0.22. A and B are independent, find P(B)=?

A: It is given that P(A) =0.55 P(A and B) =0.22 Given, Event A and B are independent then, P(A and B)...

Q: The weights of ice cream cartons are normally distributed with a mean weight of 13 ounces and a stan...

A: From the provided information, Mean (µ) = 13 Standard deviation (σ) = 0.5 Let X be a random variable...

Q: What is the answer??

A: a).Given, α=0.05n=25x=560s=45 Here, standard error is obtained as- Standard error=sn=4525=9 As per z...

Q: Find the Margin of Error, if we are asked for 90% confidence interval where the mean is 52.3, the st...

A: The provided information are: Confidence level = 90% Population standard deviation (σ)=2.15 Sample s...

Q: A psychologist is studying the self image of smokers, as measured by the self-image (SI) score from ...

A: Solution: Given information: μ=82 Population meanσ=12 Population standard deviationsx=74 Sample mean...

Q: Assuming the population has an approximate normal distribution, if a sample size n = 26 has a sample...

A: As the population standard deviation is unknown. The critical value at 25 (n-1) degree of freedom at...

Q: the second to the last part, the dropdown options are: Greater OR Less; is OR is not.

A: Let ρ denotes the linear correlation between court incomes and justice salaries. The test is that th...

Q: John Believes that 50% of first-time brides in US are younger than than their grooms. He performs a ...

A: State the hypotheses. That is, there is no evidence to conclude that percentage is the different fr...

Q: The owner of a computer repair shop has determined that their daily revenue has mean $7200 and stand...

A: Let x¯ is defined as the mean daily revenue. The mean is $7200, standard deviation is $1200. The dai...

Q: As a general guideline, the research hypothesis should be stated as the O null hypothesis. tentative...

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for...