The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 33 liters, and standard deviations of 14 liters. What is the probability that daily production is less than 38 liters (round your answer to 4 decimals)

Q: If n = 230 and (p - hat )= 0.35, find the margin of error at a 98% confidence level

A: The question is about margin of erro Given : Sample size ( n ) = 230 Sample prop. ( p^ ) = 0.35…

Q: For a standard normal table or excel function find the probability,  Calculate P(Z>0.89)  (Round…

A: standard normal distribution Z~N(0,1) P(z>0.89) = ?

Q: INI #L The EPA maximum contaminant level (MCL) for arsenic is 10 micrograms per liter. (10µg/L). You…

A: The average Arsenic level from 45 water samples was given and is 10.57 with a standard devtion of…

Q: From 80 of its restaurants, Noodles & Company managers collected data on per-person sales and the…

A: We have given data:   Potsticker % of Sales Per-person Spending Low Medium High Row total…

Q: Do you prefer paintings in which the people are fully clothed? This question was asked by a…

A: First sample: Sample size n1=57 Number of successes r1=44 Second sample: Sample size n2=59 Number of…

Q: Do left handed starting pitchers pitch more innings per game on average than right handed starting…

A: Left Right 7 6 5 5 5 4 7 6 4 5 6 4 7 5 5 5 6 3   5

Q: Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to…

A: we have to find out the p(-c ≤Z≤c)=0.9566

Q: confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment.…

A: From the provided information, Sample mean (x̄ d ) = 4.4 Sample size (n) = 50  standard deviation (s…

Q: If administrators are selected randomly from the​ faculty, what is the approximate probability that…

A: Given that, No. of teachers = 2000 P(men) = p = 50% = 0.50 P(women) = q = 50% = 0.50 No. of…

Q: Use the Standard Normal Table or technology to find the z-score that corresponds to the cumulative…

A: Suppose Z~N(0,1), then, we need to find the value of z for which ϕ(z)=0.6756

Q: A poll for a statewide election has a margin of error of 3.72 percentage points. How many voters…

A: The question is about sample size estimation Given : Margin of error ( E ) = 3.72 % = 0.0372…

Q: b) Find P(Z < 0.5)

A: Let Z be the standard normal variable whose mean is 0 and sd is 1. To find the following…

Q: Data Set 37, “Cola, Weights and Volumes” in Appendix B includes volumes (ounces) of a sample of cans…

A: Given that n = 36, mean (M) = 12.19 oz, sample SD (s) = 0.11 oz Level of significance = 0.05

Q: 1. Consider a Gaussian statistical model X₁,..., Xn~ N(0, 0), with unknown > 0. Note that Var (X) =…

A: The likelihood function for the Gaussian statistical model is given…

Q: A personnel manager has found that, historically, the scores on aptitude tests given to applicants…

A: Answer  Sample size [n] = 11 Sample mean =[x] =70.76 Standard deviation =24.09 Confidence interval =…

Q: Calculate the mean and variance for the binomial distribution, n=19, P =0.18

A: Answer: From the given data, Sample size(n) = 19 P = 0.18    and   q = 1 - p = 1 - 0.18 = 0.82

Q: Examine the following two-factor analysis of variance table shown to the right. Complete parts a…

A: From the given information we make following calculation

Q: Test the claim that the mean GPA of night students is significantly different than 2.2 at the 0.01…

A: Solution-: Given: x¯=2.22,μ0=2.2,n=80,s=0.06,α=0.01 We want to find, (a) State the null and…

Q: In a random sample of 282 independent returns from this year, around __________ returns, give or…

A: According to estimates by the office of the Treasury Inspector General of IRS, approximately 0.05 of…

Q: The mean weight of a popular breed of bull is 1135 pounds with a standard deviation of 97 pounds.…

A: According to the given information in this question We need to find the value of standard error

Q: Two identical racing cars are being tested on a circuit. For each car, the number of mechanical…

A: Two identical racing cars are being tested on a circuit. For each car, the number of mechanical…

Q: The heights of fully grown trees of a specific species are normally distributed, with a mean of 79.0…

A: The mean of the sampling distribution of the sample mean is obtained below as follows:   From the…

Q: University bookstores order books that instructors adopt for their courses. The number of copies…

A: Returns 4 15 11 7 5 9 4 3 5 8

Q: Most married couples have two or three personality preferences in common. A random sample of 377…

A: Problem 8: First sample: Sample size n1=373 Number of successes x1=291 Second sample: Sample size…

Q: How does the fuel consumption of a car change as its speed increases? The table presents data for a…

A: That is, there is no evidence to conclude that the there is a significant evidence of straight-line…

Q: 1. The department of health studied the number of patients who need liver transplantation. The…

A: The regression equation is used to predict the dependent variable based on the independent variable.…

Q: Confidence level Critical value z* = 1.645 0.90 0.95 0.99 469730.3153656.qx3zqy7 z* = 1.960 z* =…

A: Suppose p is the true population proportion of voters, who were against fire department bond…

Q: A confidence interval for a population mean has length 26 a) Determine the margin of error. b) If…

A: Answer:- Given, A confidence interval for a population mean has length 26.  That is, Width of the…

Q: As a rule of thumb, we can apply the Central Limit Theorem for Sample Means for population…

A: Let Xi be the random variable,  such that i=1,2,...,n and E(Xi)=μ, V(Xi)=  σ2  When n be large then…

Q: 4. Find a 95% confidence interval for the difference of two means when you have independent samples,…

A: We have two independent samples. n1=64,  s12=6.1,  x¯1=7.9 n2=64, s22=10.4, x¯2=8.5 Confidence…

Q: normal distrubtion with mean 8 and standard daviation 1  find the 15TH pwecwntile marks of this…

A: Let X be the normal distribution with mean 8 and standard deviation 1.  X~N(μ=8,σ=1)

Q: 7 studies show that or=19. For Englewood (a suburb of Denver), a random sample of m² = 16 winter…

A: The range where the population parameter likely to occur using the sample statistic information…

Q: If n = 530 and p- hat confidence level = 0.65, find the margin of error at a 95%

A: Answer: From the given data, Sample size (n) = 530 Sample proportion (p^) = 0.65

Q: Number of Facilities Number 9 11 16 21 27 30 Average Distance (miles) 1.67 1.11 0.83 0.63 0.52 0.46…

A: Number of Facilities Average Distance 9 1.67 11 1.11 16 0.83 21 0.63 27 0.52 30 0.46…

Q: Current Attempt in Progress Reading and Writing on the SAT Exam The Scholastic Aptitude Test (SAT)…

A: The Scholastic Aptitude Test (SAT) has two points: Reading and Writing and Mathematics scores on…

Q: It's proposed that the average life expectancy these days is 72.4, but recent data suggests it might…

A: sample size(n)=82 Mean(x)=74 standard deviation(s)=20.2 significance level(α)=0.10 The null and…

Q: 5. For the claim that is given symbolically below, determine whether it is part of a left-tailed,…

A: Claim = μ≥14.7

Q: A strain of genetically engineered cotton, known as Bt cotton, is resistant to certain insects,…

A: The estimated regression equation is  Number^ of mrid per 100 plants=0.54+6.81×Bt cotton planting…

Q: Researchers conducted a study to determine whether magnets are effective in treating back pain. The…

A: From the provided information, n1=22x1=0.55s1=0.63n2=22x2=0.41s2=1.41

Q: The Health Care Cost Institute tracks health care expenditures for beneficiaries under the age of 65…

A: The data for the total annual cost and employee out-of-pocket is given.

Q: A confidence interval for a population mean has length 28 a) Determine the margin of error. b) If…

A: Answer: From the given data, Confidence interval for a population mean has length 28

Q: In the of roulette, a player can place a $4 bet on the number 2 and have a game probability of…

A: A player can place a $4 bet on the number 2 and have a 1/38 probability of winning. the player is…

Q: The upper tail area for the test statistic z = 2.13 was found to be 0.0166. To find the p-value…

A: Test statistic, z=2.13 Upper tail area, Pz&gt;2.13=0.0166

Q: That is a sampling distribution of a sample statistic?

A: Here Given for Sampling distribution

Q: The National Center for Health Statistics reports that the LDL cholesterol for adults has a mean of…

A: Sample size n=23 Sample mean=144.3 Population standard deviation =40

Q: In a reaction time experiment, participants are asked to press a button as soon as they see a light…

A: In a reaction time experiment, participants are asked to press a button as soon as they see a light…

Q: 24 hours fitness wants to determine whether the number of days per week that college students spend…

A: Here ,  There are two categorical variables (Days per week spend exercising) &amp; (Gender)  Here…

Q: a. Test the claim using a hypothesis test. Consider the first sample to be the sample of subjects…

A: Given that 40 of the 46 subjects treated with echinacea develop infection and 93 of the 110 placebo…

Q: A. O Plot B Plot A plots for three data sets are shown below. Which plot indicates that the data are…

A: We have to choose the graph whose shows approximately normal distribution:

Q: It's proposed that the average life expectancy these days is 72.4, but recent data suggests it might…

A: Mean(x)=74 standard deviation(s)=20.2 sample size(n)=82 significance level(α)=0.10 Given null and…