Consider the following hypothesis test: Ho : μ > 20 Ha: μ < 20 A sample of 40 provided a sample mean of 19.4. The population standard deviation is 2. a. Compute the value of the test statistic (to 2 decimals). Enter negative value as negative number. -1.90 b. What is the p-value (to 3 decimals)? c. Using a = 0.05, can it be concluded that the population mean is less than 20? - Select your answer V

Q: A random sample of 40 computer chips is drawn from population and the weight of each recorded. A…

A: From the provided information, Mean (µ) = 0.8 Standard deviation (σ) = 0.1 X~N (0.8, 0.1) Sample…

Q: The delivery times for all food orders at a fast-food restaurant during the lunch hour are normally…

A: Data given  Population mean μ=6.7, standard deviations σ=2.1

Q: With simple random sampling, E(X) = μ. Proof Since, from Lemma A, E(X) = 4, it follows from Theorem…

A: Considering X~Geop, the PMF is given as: PX=x=qx-1p; x=1,2,...; p+q=10: Otherwise

Q: In a test of the effectiveness of garlic for lowering cholesterol, 43 subjects were treated with…

A: given data sample size (n) = 43sample mean ( x¯ ) = 4.2sample standard deviatio (s) =17.890% ci for…

Q: The pulse rates of 164 randomly selected adult males vary from a low of 41 bpm to a high of 121 bpm.…

A: Given The data is as follows: Sample size, n=164 Confidence level, CL=0.99 Margin of error, E=4

Q: An IQ test is designed so that the mean is 100 and the standard deviation is for the population of…

A: Obtain the sample size needed. The sample size needed is obtained below as follows : Procedure for…

Q: The amount of beverage in a 16-oz bottle is normally distributed with a mean of 16.2 oz and a…

A: Mean(µ) = 16.2Standard deviations (σ) = 0.1X ~ N (µ, σ )= N(16.2, 0.1)

Q: According to a poll, half of all pet owners would get their next dog or cat from a shelter. Consider…

A: Given n=11 P=0.5

Q: The following data summarize the results from an independent measures study comparing three…

A: Given information: n1=n2=n3=6, N=18, k=3M1=4, M2=5, M3=6T1=24, T2=30, T3=36SS1=30, SS2=35,…

Q: To study the effect of temperature on yield in a chemical process, five batches were produced at…

A: a.  Source of Variation Sum of Squares Degrees of Freedom Mean Square F p-value Treatments 650.67  2…

Q: Given P(A) = 0.037, find the probability of the complementary event.

A: Given that, P(A) = 0.037 To find the P(A').

Q: A 2019 Gallup Poll asked a national random sample of 515 adult men to state their current weight.…

A: Given The data is as follows: Sample mean, x¯=194 Sample size, n=515 Population standard deviation,…

Q: Fifty percent of consumers prefer to purchase electronics online. You randomly select 8 consumers.…

A: Answer:- Given, 50% consumers prefer to purchase electronics online.  That is, Probability of…

Q: A machine that paints traffic stripes on roads is mounted on a truck and set to a width of 4 inches.…

A: The sample size is 30 The sample mean is 3.88 inches The sample standard deviation is 0.5 inches We…

Q: K Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69.3 bpm. For a random…

A: We have given that  Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69.3…

Q: Find the area under the normal curve to the right of z = -0.84. Round the answer to four decimal…

A: Let z be the random variable from normal distribution.

Q: soccer, 19 rugby, 18 had cer and rugby, 12 had soccer and basketball, 11 had by and basketball. 6…

A: Given Total 85 cities

Q: a television set that also have a VCR. Year 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988…

A:

Q: (Round to four decimal places as needed.) d. What are the mean and standard deviation for this…

A: Given that  Number of trials n=10 Success of probability p=0.34 X~bin(n,p)

Q: The null hypothesis in words is

A: The test is to check whether there are any significant mean differences among the treatments.

Q: Complete the F table.  (b) Compute a Bonferroni procedure and interpret the results.

A:

Q: According to the records of an electric company serving the Boston area, the mean electricity…

A: We have given that  Mean(μ)=1650Standard deviation (σ)=320

Q: If the distribution of scores on a math placement test is approximately normal with a mean of 65 and…

A: From the provided information, Mean (µ) = 65 Standard deviation (σ) = 8 X~N (65, 8)

Q: You are given the following data, where X₁ (final percentage in math class) and X₂ (number of…

A: Introduction: It is required to perform a multiple regression analysis.

Q: Describe the sampling distribution of p. Assume the size of the population is 30,000. n = 900, p =…

A: Answer:- Given, sample size, n = 900   Proportion, p = 0.625 Population size, N = 30000  Using…

Q: Athletes performing in bright sunlight often smear black eye grease under their eyes to reduce…

A: To test the hypothesis that eye grease increases sensitivity on average, we will use a one-sample…

Q: 5. Health care issues are receiving much attention in both academic and political arenas. A…

A: i.  To calculate the mean, we add up all the ages and divide by the total number of seniors:  Mean =…

Q: The average retirement age in America is 65 years old. Do small business owners retire at a younger…

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

Q: onsider yourself as a Math tutor to Grade 11 students. Study carefully the examples of real-life…

A: Real-life problem: A company produces light bulbs that have a mean lifespan of 2000 hours and a…

Q: at the time she was hired as a server at the grumney family restaurant, beth brigden was told, "you…

A: From the provided information, Population standard deviation (σ) = 3.24 Sample mean (x̄) = 84.85…

Q: An educator wants to construct a 99% confidence interval for the true proportion of California…

A: Note:- In this question first 3 subparts already answered. So ,i  answer the last 3 subparts.

Q: At BYU-Idaho there has been a lot of interest in the performance of students in online classes.…

A: Given The data is as follows: Grade Traditional Online  A 26 14 B 31 26 C 40 23 D 21 11…

Q: provide step-by-step reasoning please

A: The correct answer is D) All of the above are necessary.

Q: The lifetime of a certain type of battery is known to be normally distributed with standard…

A: GIVEN DATA, normal distributionσ=22n=50x¯=120.1CI=0.95α=1-0.95=0.05

Q: Where did we get the one over two-squared? I don't understand why it is one over 2^2 Variance…

A: Please find the explanation below.

Q: Pearsons Product Moment Correlation Coefficient             Given the data on the next page,…

A: Introduction: It is required to obtain the correlation coefficient between the two variables,…

Q: Two thousand randomly selected adults were asked if they are in favor of or against cloning. The…

A: The number of females who are against cloning is 300, and the number of males who are against…

Q: A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food…

A: given data, normal dsitributionμ=142.2σ=24we have to find out the given probabilities.

Q: Solve the following problems below. Show your solutions completely. 1. You happen to wonder what is…

A: Given: Subjects &amp; Average Mean (μ) Standard Deviation (σ) Class Size (n) Quarter Grade (x)…

Q: 1. A line graph is 2. Spreadsheets are an integral tool to aid researchers in handling and…

A: Hi there! Thanks for posting the question. Since you have posted a question with multiple sub parts,…

Q: 85 cities were surveyed to determine sports teams. 25 had soccer, 19 had rugby, 18 had basketball,…

A: Here the given information is 85 cities were surveyed to determine sports teams. 25 had soccer, 19…

Q: A Pew Research Center poll asked 1102 teenagers (12- to 17-year-olds) in the United States if they…

A: Given sample size (n) = 1102 Proportion of respondents that said yes, p = 71% = 0.71 Since you have…

Q: Find the expected value for the given probability distribution. X P(x) 0 0.19 1 0.28 2 0.14 3 0.26 4…

A: Given Find the expected value for the given probability distribution. X.            P(x) 0.…

Q: 00 Q3. Let ₁,...,xN be data in Rm with sample covariance C = NXXT. Suppose u; is an eigenvector of C…

A: This question seeks to prove that the sample variance of the projections of a set of data points…

Q: 3. . A single observation was taken from a population with pdf 1 f(x) == / 03.5 a. Find x. b. Find…

A: a. To find x, we first need to determine the critical value for the test. Since the null hypothesis…

Q: A simple random sample of size n = 36 is obtained from a population that is skewed right with µ = 84…

A: Note: Hi! Thank you for the question, As per the honor code, we are allowed to answer three…

Q: There are 42 runners in a race. How many ways can the runners finish first, second, and third? There…

A: there are 42 runners in a rece we have to find out the no. of ways can finish first, second and…

Q: 2.b. You expect that one more year as CEO increases CEO salary by 1% given the other variables. Test…

A: Given Claim: "The CEO salary increases by 1% for one more year as CEO increases given the other…

Q: The weights of a certain dog breed are approximately normally distributed with a mean of u = 55…

A: Given,mean(μ)=55Standard deviation(σ)=5

Q: The variable X denotes a binomial random variable with parameters n and p. Indicate which area under…

A: Solution-: The area between the lower delimiting x-value, .... and the upper delimiting  x-value…