Part (d) Give the distribution of EX. (Round your answers to two decimal places.) EX-N✔ 430000 409600000 X Part (e) Find the probability that the teachers earn a total of over $400,000. (Round your answer to four decimal places.) 1.4823 Part (f) Find the 90th percentile for an individual teacher's salary. (Round your answer to the nearest whole number.) $

Q: How many ways are there to rearrange the letters in the word STATISTICS?

A: We have given the word STATISTICS We have to find a number of ways are there to rearrange the…

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

A: Answer:- Given, Sample size, n = 100  Sample mean = 3.0 minutes  Standard deviation, σ = 1.0 minute.…

Q: Suppose X is a noram random variable with mean 45 and standard deviation 18 Calculate P( X < 16)

A: answer: From the given data, mean (μ) = 45 Standard deviation(σ) = 18

Q: A coffee shop manager want to visualize the shape of daily sales of coffee (# of cups) in the past…

A: A coffee shop manager wants to visualize the shape of daily sales of coffee (# of cups) in the past…

Q: Make a scatter diagram for the data. Use the scatter diagram to describe how, if at all, the…

A: Enter the data in Excel.

Q: Do sit down restaurant franchises and fast food franchises differ significantly in stock price?…

A: The p-value of the test is 0.6807.

Q: Cell Phone Call Lengths The average local cell phone call length was reported to be 2.39 minutes. A…

A: Sample size (n)=24  Sample mean =2.83  Sample standard deviation (s)=0.9 At Level of significance…

Q: A sports car manufacturer paints its cars silver, white, black, and red in the following…

A: Given data : a) P[ White ,Gray ] =P[white] P[gray] =0.3 0.6=0.18 Explanation : There the P[ White…

Q: Assume the readings on thermometers are normally distributed with a mean of 0°C and a standard…

A: We have given that the readings on thermometers are normally distributed. Mean μ = 0°CStandard…

Q: For a normal distribution, find the probability that a sampled score is: (a) higher than two…

A: As per the Bartelby guidelines only three sub-parts can be answered. Kindly resubmit the question…

Q: A sample of 26 observations is taken from a normal distribution with unknown mean, the sample mean…

A: Answer: From the given data, Sample size(n) = 26 mean (x¯) = 12.6 Standard deviation(σ) = 2.5 95%…

Q: A statistics instructor is interested in the ability of students to assess the difficulty of a test…

A: First we need to find mean and standard deviation of the given data by R software we find &gt; x =…

Q: Consider the random variable X which has the pdf fx(x) = k(1-x) for 0<x< 1; otherwise. (a) Find the…

A: Since the total area (probability) under a PDF is 1, therefore:…

Q: Consider the following studies. Study I: A researcher randomly divided 200 high school students…

A: Part A: Study I is experimental because the researcher randomly divided the participants into two…

Q: rt A (Introduction): a) Write an introduction: • Explain the problem in general (e.g., vitamin D…

A: Vitamin D is an important nutrient that is essential for healthy bones and teeth, as well as a…

Q: Find the z-score for which the probability that a normal variable exceeds that score equals: (a)…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: Independent random samples of 27 people living on the west side of a city and 26 people living on…

A: H0:μw≥μeHa:μw&lt;μe t0=−2.344 t0.04=−2.107

Q: An opaque bag contains 13 yellow and 12 teal marbles. If two marbles are randomly chosen from the…

A: Answer: From the given data, number of yellow marbles = 13 number of teal marbles = 12 Total number…

Q: -olve the problem. Suppose that n trials of a binomial experiment result in no successes. According…

A: According to the Rule of Three we have 95% confidence that the true population proportion has an…

Q: 101 students at a college were asked whether they had completed their required English 101 course,…

A: We have given that,  Sample size (n) = 101 and favorable cases (x) = 61 Then,  99% confidence…

Q: A taxi company tests a random sample of 10 steel-belted radial tires of a certain brand and records…

A: Answer  Given  68000, 54000, 47000, 52000, 41000, 58000, 61000, 51000, 47000, 59000. sample size [n]…

Q: According to a survey, 22 1% of credit card holding familes in a certain area hardly ever pay off…

A: Sample size, n=22 Prob. that family hardly ever pay off the balance = 0.221

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: Solution:- from given information population proportion p = 0.79 Margin of Error M.E. = 0.04

Q: Suppose that events E and F are independent with P(E) = 0.8 and P(F) = 0.6 What is P(E and F)…

A: Answer: From the given data, P(E) = 0.8 P(F) = 0.6 The events E and F are independent,

Q: Do pilots (obtained at a private pilot’s license from ERAU) who graduate from Riddle have different…

A: Step 1: State the hypothesis Null Hypothesis (H0): There is no significant difference in GPAs…

Q: This is not the correct solution. Is there another solution avaliable for this problem?

A: To calculate the variance of a portfolio with equal investments in each stock, we need to use the…

Q: A data set about speed dating includes "like" ratings of male dates made by the female dates. The…

A: Sample size (n)=194  Sample mean=6.86  Sample standard deviation =2.07  At level of significance…

Q: A manufacturer of detergent claims that the contents of boxes sold weigh on average at least 20…

A: Sample size n =25 Sample mean=19.59 Population standard deviation =0.4 NOTE:- According to bartleby…

Q: Express the confidence interval 85.2% ± 4% in interval form. Express the answer in decimal format…

A: Given confidence interval is 85.2% ± 4%  We have to answer in decimal form

Q: if n=50, bar-x = 35 and s = 16 construct a confidence interval at a 99% confidence level, assume the…

A: Answer: From the given data, Sample size(n) = 50 mean (X¯) = 35 Standard deviation(S) = 16 99%…

Q: You may need to use the appropriate appendix table to answer this question. Alexa is the popular…

A: n=2800σ=860

Q: The measurements are made on the inside diameter of the bearing, with only the last three decimals…

A:

Q: Use a t-distribution to find a confidence interval for the difference in means μ = μ₁ −μ₂ using the…

A: Answer  Given Confidence interval =99% α=1-0.99=0.01 α/2 =0.005

Q: With explanation

A: To calculate the confidence interval for the difference between the means, we can use the formula:…

Q: I am doing a case study for statistics and I have to do a report with it. What do I include on the…

A: When writing a statistical case study report, you should include the following components:…

Q: You are given the following information about y and x. Dependent [y] = 5, 15, 7, 12 Independent…

A: x 9 10 11 7 y 5 15 7 12

Q: What type of data is the dependent variable in a two sample t-test? Discrete Continuous Qualitative…

A: Discrete: The term "discrete" refers to something that is separate, distinct, or non-continuous. In…

Q: Use a t-distribution and the given matched pair sample results to complete the test of the given…

A: The question is about paired t test Given : Null and alt. hypo. : H0 : μd = 0Ha : μd &lt; 0   Data :…

Q: uppose 58.8% of small businesses experience cash flow problems in their first 5 years. A consultant…

A: Answer  Sample size [n] = 557 P = 58.8% =58.8/100 = 0.588  the probability that greater than 55.85%…

Q: You want to obtain a sample to estimate a population mean age of the incoming fall term transfer…

A: σ = 5.490% ci for μ.E = 1.8n = ?

Q: The portfolios of wealthy people over the age of 50 produce yearly retirement incomes which are…

A: The mean equal to $125,000 and standard deviation of 25,000 Sample size n =16

Q: A study was done on proctored and nonproctored tests. The results are shown in the table. Assume…

A:

Q: In the article The Median isn't the Message how does understanding statistics make a difference in…

A: Understanding statistics is crucial in being able to comprehend the article "The Median isn't the…

Q: A college entrance exam company determined that a score of 24 on the mathematics portion of the exam…

A: Given, X ¯=24.4s=3.1n=250μ=24α=0.10 The null and alternative hypothesis are  H0:μ=24H1:μ&gt;24 this…

Q: You are given the sample mean and the population standard deviation. Use this information to…

A: The sample size is 31, sample mean is $110.20 and population standard deviation is $11.44.

Q: A least squares regression equation was created from last year’s student data to predict Exam 2…

A: y = 6.7 + 0.88x  X=118, y=115

Q: Find the mean and variance for the binomial distribution, P=0.37,n=22

A: Answer: From the given data, p = 0.37  and  q = 1 - p = 1 - 0.37 = 0.63 sample size ( n )= 22

Q: A medical researcher wants to examine the relationship of the blood pressure of patients before and…

A: The hypothesis is H0:μD=0 versus Ha:μD≠0. The p-value is 0.5704.

Q: Consider the matrix T = (4) to three decimal places. 0 0.2 0.0 0 0.3 0.3 1 0.5 0.7 a) If (0) = ») Is…

A: The Given transition probability matrix is: T=00.2000.30.310.50.7 Regular Markov Chain. A transition…

Q: You may need to use the appropriate technology to answer this question. To study the effect of…

A: Use EXCEL Procedure to obtain the values in ANOVA table   Follow the instruction to obtain the…