Statistics Answer the following using excel Assume that the time it takes to finish a particular task of a complicated manufacturing process follows a normal distribution with a mean of 4.3 minutes with a standard deviation of 0.7 minutes. a) what is the probability that it takes longer than 5 minutes to complete this task? b) what is the probability that it takes anywhere between 4 and 5 minutes to complete this task?

Q: is a standard normal variable, find the probability. P>z0.68     0.2177     0.3156     0.2483…

A: X~N( 0 , 1 )   μ=0  , ?=1 (for standard normal distribution)    Z-score =( x - μ )/?

Q: Refer to the accompanying data set of mean drive-through service times at dinner in seconds at two…

A: The data shows the mean drive-through service times at dinner in seconds at two fast food…

Q: and 0.85? 6.5 The production employees at a garment factory have been surveyed several times to…

A: By Using the margin of error to calculate the required sample size

Q: To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45…

A: From the provided information, Sample size (n) = 45 Sample mean (x̄) = 53.5 Standard deviation (s) =…

Q: Mary scored a 25 when the mean is 23 with a SD of 1.5 Sarah scored a 7 when the mean is 6 with a SD…

A: Given Information: Mary's score is 25 Mean μ=23 Standard deviation σ=1.5   Sarah's score is 7 Mean…

Q: Consider the following hypothetical scenario. A study was conducted to compare customer satisfaction…

A: Statistical test are used to compare the sample and population. It is also used to compare the…

Q: The data represent the results for a test for a certain disease. Assume one individual from the…

A: Solution: The given information in the table form is    Yes No Total  Positive 133 13 146…

Q: 2) Let X & Y have the joint probability function f(x,y) = cx²y, -y ≤ x ≤ 1,0 ≤ y ≤ 1. i) Find c such…

A: Let X and Y have the joint probability function  f(x,y)=cx2y ; -y≤x≤1, 0≤y≤1  0    ; otherwise

Q: Fill in the blanks with either small or large. A) You are more likely to reject the null hypothesis…

A: Null hypothesis is the statement of equality in the hypothesis testing. A hypothesis test is tend to…

Q: Construct a probability distribution for the data and draw a graph for the distribution. The…

A: Followings are the Explanation of the question

Q: The accompanying table shows the numbers of male and female students in a particular country who…

A: Given: The table shows the Business graduates:   Business degrees Nonbusiness degrees Total…

Q: You are testing the claim that having lights on at night increases weight gain (abstract). A sample…

A:

Q: H₁: P₁ P₂ (b) Determine the type of test statistic to use. Z (c) Find the value of the test…

A: It is given that  For sample 1: Favourable cases, X1 = 48 Sample size, n1 = 258 For sample 2:…

Q: (d) Would it be unusual for the sample mean to be less than 27 Round your answer to at least four…

A: Solution: Let  X~N(μ=2.24,σ=1.2) n= 90 Sample size

Q: boxes of cereal are labeled as containing 14 ounces. Following are the weights, in ounces, of a…

A:

Q: Research on stock market data indicated that over the course of a year, 50% of stokes go up. A…

A: Given Information: Research on stock market data indicated that over the course of a year, 50% of…

Q: Estimate the minimum sample size needed to achieve the margin of error E=0.013 for a​ 95%…

A: given data  E = 0.013 ci for P 95% ci n = ?

Q: Give a 99% confidence interval, for µ₁ −µ2 given the following information. n1 n₁ = 50, x1 = 2.03,…

A: given data  x¯1 = 2.03s1 = 0.4n1 = 50x¯2 = 2.52s2 = 0.98n2 = 4599% ci for μ1 - μ2   df =…

Q: 5. Hypothesis testing on the mean with known o2: Medical researchers have de- veloped a new…

A: Given that Sample size n=55 Sample mean=5.45 Population standard deviation =0.3

Q: In a large college, 85% of students are  fluent in two or more languages. Three students are…

A: a) Suppose a random variable X, defines that the number of students, who are fluent in two or more…

Q: Consider a random variable Y with density function given by f(y) = ke-y²/2 a Find k. b Find the…

A:

Q: hypotheses be for the average amount of money a person keeps in his or her checking account is less…

A: It is given that  Claim: The average amount of money a person keeps in his or her checking account…

Q: Carry your intermediate computations to three or more decimal places. (If necessary, co (a) State…

A:

Q: ↑ Each of the following three data sets represents the IQ scores of a random sample of adults. IQ…

A: The answer is attached below.

Q: a. Statement of the Problem: Does Price (X3) and Promotion (X4) predict Satisfaction (X2)? b.…

A: From table, model summary, we got to know that, the correlation between independent variable price…

Q: Use a sample of 20 muffins with a sample mean of 210 calories and a known population standard…

A: GIVEN DATA, n=20x¯ =210population standard deviation is known σ=32CI=0.99α=1-0.99=0.01Zc=?we have to…

Q: The amount of time it takes Sally to do her Math Practice Quiz is uniformly distributed between 5…

A: Let X be the amount of time takes Sally to do her Math Practice Quiz follows Uniform distribution…

Q: An experimenter flips a coin 100 times and gets 41 heads. Find the 98% confidence interval for the…

A: From the provided information, An experimenter flips a coin 100 times and gets 41 heads Sample size…

Q: n Employee Value Proposition (EVP) is about defining the essence of a company. The EVP is the value…

A: N=200 Find χ2stat =?

Q: number of suits sold per day at a retail store is shown in the table, with the corresponding…

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

Q: Several months ago while shopping, I was interviewed to see whether or not I'd be interested in…

A: Method: We used the proportion Z test statistic to calculate the value of test statistic

Q: In a horse​ race, a particular bet is won if you selected the two horses that finish first and…

A: We have given that Number of horses (n) = 17 Number of selection (r) = 2

Q: Problem 2) The random variable X has the following probability density function: fx(x) = {cx a) Find…

A: Method By using the probability density function to find the value of c . After that we use the…

Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and…

A: Given information: The 32-week baby weight has mean 2700 grams and standard deviation 600 grams. The…

Q: Problem 3) The cumulative distribution function of random variable Vis: v <-5 a) What is E[V]? b)…

A: Cumulative distribution function is given  After differentiating the cumulative distribution…

Q: O) Let X & Y have the joint probability function f(x, y) = 2, 0≤x≤ y ≤ 1, i) Find E(Y|X = x). What…

A:

Q: Assume that you want to construct a​ 95% confidence interval estimate of a population mean. Find an…

A:

Q: The test score of a sample of 20 students in a class are as follows: 20, 30,21, 29 10,17,18,15, 27,…

A:

Q: 4 Harris Interactive asked samples of adults (age 18 and over) in various countries, "How important…

A: Given information:   U.S. China India Britain France Germany Spain Italy Very important 4 19 23…

Q: he life in hours of a biomedical device is known to be approximately normally distributed. A random…

A: Note: Questions 1,2 and 3 are three different questions. As per the answering guidelines I have to…

Q: f(y)= - Bey

A:

Q: (a) Identify the shape of the distribution, and (b) determine the five-number summary. Assume that…

A: It is given that the box plot.

Q: (d) Find the critical value at the 0.05 level of significance. (Round to three or more decimal…

A: It is given that  t = -2.114 df = 19 α = 0.05

Q: Based on a survey, assume that 25% of consumers are comfortable having drones deliver their…

A: Given,25% of consumers are comfortable having drones delivertheir purchases.

Q: From a sample of 200 bread rolls from Ideal bakery, 95 of the were wheat. The manager of the bakery…

A: Given data n=200 The manager claims that 49% of rolls are wheat

Q: The probability that a randomly selected school or district uses digital content and uses it as part…

A:

Q: A researcher has Critical Value(s) Test Statistic p-Value = H₁₂μ=11 and she weighs 23 samples and…

A: Here, mean is 10 standard deviation is 2.6. Sample is 23. We will use one sample t test.

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Givensample size(n)=1051x=513confidence level=99%

Q: when solving a-c, what does the first part of the expressions (1z1 less than or equal to 1) mean? If…

A: Solution: Let z be  the standard normal variable with mean 0 and standard deviation 1.  z~N(0,1)

Q: Some bottles of bubble bath have gone past their expiration date. The employees want to know if…

A: Given Information: Hypothesized value of population mean is 124 Population standard deviation σ=8…