When it is operating properly, a chemical plant has a daily production rate that is normally distributed with a mean of 885 tons/day and a standard deviation of 42 tons/day. During an analysis of period, the output is measured with random sampling on 60 consecutive days, and the mean output is found to be x=875 tons/day. The manager claims that at least 95% probability that the plant is operating properly. Is he right? Justify your answer! Sol:

Q: Find the margin of error for the given values of c, o, and n. c = 0.90, o = 2.9, n = 81 Click the…

A: From the provided information, c = 0.90, σ = 2.9, n = 81

Q: Calculate the measures of central tendency (mean, median, and mode) and the measures of dispersion…

A: In given data there are only 28 observations  x arranged 30 16 21 16 35 19 40 20 25 20…

Q: Find the minimum sample size n needed to estimate u for the given values of c, o, and E. c=0.98,…

A: Answer: From the given data, Standard deviation (σ) = 7.8 Margin of error (E) = 1 Confidence…

Q: Suppose that I conduct a study to examine whether drinking kool-aid improves memory performance. I…

A:

Q: Before you attempt this question, on your graphing calculator hit MODE and turn STATDIAGNOSTICS on!…

A: The data is defined below as follows:    Let X represents the independent variable as the Brightness…

Q: Find the margin of error. 95% confidence interval; n = 21; 0.180 0.168 0.144 0.151 21;= 0.37; s =…

A: Mean = 0.37 S = 0.37 N= 21

Q: Find the probability distribution. Find the expected value, variance, and standard deviation.

A: Two coins are selected from a pocket that contains 3 nickels and 4 quarters . There are total 3 + 4…

Q: Determine the standardized statistic from the data. (Round your answer to two decimal places.) i 7

A: Given: Total number of couples included in the analysis (n) = 40 Number of couples where the male…

Q: (Type whole numbers.) Class Frequency 126-162 163-199 200-236 237-273 274-310 the data set using 5…

A: 169 157 126 130 179 161 166 220 142 133 194 209 151 257 260 248 306 139 204 181 Sample size n =20

Q: The hourly wages for a group of employees (in U. S. dollars) is given in the following set: {8, 12,…

A: Note: As per our guidelines we are supposed to answer only 3 subparts of any questions so i am…

Q: Listed below are numbers of Intermet users per 100 people and numbers of scientific award winners…

A: α=0.01 Internet users Award Winners 80.7 5.3 79.7 9.1 57.1 3.2 67.3 1.6 77.2 10.8…

Q: 1). Let Z be standard normal random variable, find b such that P(Z > b)= 0.1251 01115 15 C) 2.24…

A: standard normal distribution Z~N(0,1) P(z>b) = 0.1251 b = ?

Q: To estimate the benefits of an SAT prep course, a random sample of 10 students enrolled in the…

A: From the provided information, Sample size (n) = 10 The difference values are as follow:…

Q: A company manufactures light bulbs. The company wants the bulbs to have a mean life span of 996…

A: That is, there is no evidence to conclude that the mean life span of the bulbs is different from…

Q: 9, what is the probability that the entire system will work?

A: Here given that there are 5 components in the system.  Each components works independently.…

Q: a. Make a frequency distribution showing cumulative frequencies and cumulative relative frequencies.…

A: Data 80 107 88 114 95 96 87 99 96 100 99 104 112 109 103 108 112…

Q: interpet your results

A: The repeated measures ANOVA's findings show that the mean scores for the three quizzes differ…

Q: A study was done to look at the relationship between number of vacation days employees take each…

A: As per the Bartleby guidelines, only three subparts can be answered. Kindly, resubmit with note for…

Q: Compute the correlation coefficient r. Round your answer to three decimals.

A: Independent variable X- year  Dependent variable Y - percent

Q: Would you expect distributions of these variables to be uniform, unimodal, or bimodal? Symmetric or…

A: Would you expect distribution of these variables to be uniform, unimodal, or bimodal symmetric or…

Q: test statistic and p value are incorrect

A: The sample size n is 150 and the number people said they used (x) is 90.

Q: Would you expect distributions of these variables to be uniform, unimodal, or bimodal? Symmetric or…

A: Would you expect distributions of these variables to be uniform, unimodal, or bimodal? Symmetric or…

Q: The length of fish were measured at 3 different lakes. Is there evidence to suggest that the average…

A: There is no evidence to conclude that average length is not same for all the three locations. There…

Q: As sample size increases, what happens to measures of effect size such as r2 and Cohen's d? a) They…

A: As sample size increases  what happens to measures of effect size such as r2 and Cohen's d  a) They…

Q: A bag contains 11 Blue balls, 13 Red balls, and 11 Green balls. Two balls are going to be drawn from…

A: A bag contains 11 blue balls, 13 red balls and 11 green balls. Since you have asked multiple…

Q: A graph of the number of credits a student accumulates per semester prior to graduating is skewed _?…

A: A graph of the number of credits a student accumulates per semester prior to graduating is skewed…

Q: The probability of the closing of the ith relay in the circuits shown is given by p_i. Let p_1 =…

A: p1=0.4, p2=0.1, p3=0.5, p4=0.7, and p5=0.6

Q: (k^2-4)x^3+(k-2)x^2+7x-8=0

A: (k^2-4)x^3+(k-2)x^2+7x-8=0

Q: Consumers in a certain state can choose between three long-distance téléphone in continual shift of…

A: GTT loses 5% of its customers to NCJ and 10% of customers to Dash. NCJ loses 25% of its customers to…

Q: 19 Match the hypothesis to the situation. Hypothesis: 1. Ho: p1=p2 2. Ho: p = .73 3. Ho: d = 0 4.…

A: Hypothesis: 1. Ho: p1 = p2 2. Ho: p = .73 3. Ho: μd=0 4. Ho: μ1=μ2  5. Ho: µ = .73

Q: (a) Find the mean and median of the data. The mean is The median is . (Round to three decimal places…

A: Students in an experimental psychology class did research on depression as a sign of stress. A test…

Q: An educator claims that the average salary of substitute teachers in schools in a certain province,…

A: An educator has established a claim regarding the average salary of teachers in a certain province.…

Q: Given information Months  Demand April.         75 May.          60 June.         90 July.…

A: Consider the following calculations: months (x) Demand (y) xy x2 1 75 75 1 2 60 120 4 3 90…

Q: In analyzing hits by certain bombs in a war, an area was partitioned into 566 regions, each with an…

A: Given Total bombs=505 Total regions=566

Q: In a single-server queuing system, if 12 customers arrive per hour with Poisson distribution and the…

A: In a single-server queuing system, if 12 customers arrive per hour with Poisson distribution and the…

Q: Consumer choice of ovens could be either gas or an electric oven. Consider the decisions made by six…

A: In the realm of kitchen appliances, one crucial decision faced by consumers is the choice between…

Q: Let Y represent the profit (or loss) for a certain company X years after 1975. Based on the data…

A: From the provided information, The linear model Y = 0.39X + 6.92

Q: (b) Let n 1 - n ² ₁ Σ(x₁ - x) ². = i=1 Determine Var(s), that is, the variance of the sample…

A: Random variable X1,X2 .... Xn are independent follow normal distribution ~N(μ, σ2) b): Given…

Q: The table below shows the number of Central High School students who passed AP Calculus AB Exam. Has…

A: given Score Year 1 Year 2 Year 3 5 18 15 11 4 13 12 11 3 12 14 13

Q: example of a study for which the one sample z-test would the appropriate test statistic to use.…

A: One-sample z-test is appropriate when we already know the population distribution (i.e., the…

Q: You are conducting a study to see if the probability of catching the flu this year is significantly…

A: claim:P≠0,37two tailed test  for singal proportion teat statitics z=-1.893p value =?

Q: Although millions of elephants once roamed across Africa, by the mid-1980s elephant populations in…

A: Country 1979 1989 2007 2012 Angola 12400 12400 2500 2530 Botswana 20000 52000 175500 175454…

Q: Construct a frequency distribution for the data set using 5 classes. (Type whole numbers.) Class…

A: The data is given on the no. of hospital beds. Sample size (n) = 20 To construct a frequency…

Q: A study was done to look at the relationship between number of vacation days employees take each…

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

Q: 8. Suppose a couple has three children (assume that the probability of having a g boy is 0.5) a.…

A: A couple has three children. Probability of having a girl or a boy is 0.5

Q: Let � be a random variable that represents the weights in pounds (lb) of adult males who are in…

A: Answer:- Given, X has a normal distribution with mean μ = 167 lbs and standard deviation σ = 6 lbs.…

Q: Based on FAA estimates the average age of the fleets of the 10 largest U.S. commercial passenger…

A: From the provided information, Mean (µ) = 13.4 Standard deviation (σ) = 1.7 Sample size (n) = 40

Q: A manufacturer of a computer chip has found that 7% of the chips that come out of production are…

A: N = 200 P = 0.07     A). Expected number = np= 200*0.07 = 14   Standard deviation = √np(1-p) =…

Q: archaeology club has 20 members. How many different ways can the club select A. 116,280 B. 465,120…

A: The total number of members=20 The selected number of members=4 Here we have to use formula for…

Q: In studying his campaign plans, Mr. Singleton wishes to estimate the difference between men's and…

A: The data is given as- Number of male voters:n1=507 Number of female voters: n2=570 Number of men…