The z-statistic for a one-sided test is z=2.29 this test is  A) not statistically significant at either a=0.05 or a=0.01  B) statistically significant at a= 0.05 but not at a=0.01  C) statistically significant at both a=0.05 and a=0.01

Q: The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium…

A:

Q: Test the claim about the population mean p at the level of significance a. Assume the population is…

A: The summary of statistics is,

Q: The table to the right shows the number of female students who played on a sports team in grades…

A: ANOVA: ANOVA is useful method to check the Significance difference between the two or more than two…

Q: Is race a factor in the number of times a month a person eats out? The table below shows data that…

A: Given information: Level of significanceα=0.1 The hypotheses need to be tested is: H0:μ1=μ2=μ3=μ4H1:…

Q: A researcher wants to know if there is a difference between the mean amount of sleep that people get…

A: The ANOVA is conducted by using EXCEL. The software procedure is given below: Enter the data.…

Q: Use Table 4 or SALT to approximate the p-value for the t statistic in the following situation.…

A: Givena)The test is two tailedt=-1.18degrees of freedom(df)=26

Q: The probability that an observation taken from a standard normal population will have z greater than…

A: A z-score is a standard score that indicates the number of standard deviations a data value is from…

Q: each population has a normal distribution. Claim: o =0, a =0.10 Sample statistics: s, = 10.4, n, =8,…

A: According to the given information in this question We need to identify the correct conclusion

Q: The following histogram displays the distribution of battery life (in hours) for a certain battery…

A: Given data  μ = 8σ = 1.2 standard deviation rule: approximately 68-95-99.7% data fall within…

Q: researcher expects a treatment to produce an increase in the population mean. Assuming a normal…

A: Here, we know that for t-critical, we will use z-standard normal table. At 1%  and 5 %.

Q: expected value μ and the standard deviation σ

A: Let x be a random variable that represents a magnetic susceptibility (MS) reading for a randomly…

Q: Given a random variable X having a normal distribution with ?=62 ??? ?=15, find the probability that…

A: It is been asked to find the probability that X assumes a value between 55 and 74 using given…

Q: mally distributed with a mean of $2.39 and a standard deviation of $0.15. 1. What is the…

A: Given: Population mean μ=2.39 Population standard deviation σ=0.15 Let X ~ N (2.39, 0.152)

Q: Test the claim about the population mean u at the level of significance a. Assume the population is…

A: Given,sample size(n)=50sample mean(x¯)=32.3population standard deviation(σ)=1.2and singnificance…

Q: For a normal distribution with a mean of u = 30 and o = 10, what is the probability of selecting an…

A: Given : A normal dist. with Mean (μ) = 30 Standard deviation (σ) = 10 Let X be a normal variable…

Q: A manufacturing company wants to see if there is a significant difference in three types of plastic…

A: The mean and smaple size for prizes of three types of polythene is given as:TypeSample meanSample…

Q: Researchers look at the role of music on anxiety.  They believe the type of music will make a…

A: Solution:  Given information: n1=14 Sample size of classical music groupn2=14  sample size of Tecno…

Q: According to the American Red Cross, 9.3% of all Connecticut residents have Type B blood. A random…

A: The Standard deviation of the random variable X is given by

Q: Test the claim about the differences between two population variances o and o at the given level of…

A: For the given data Test statistic =?

Q: Recall that the foot length of a randomly chosen adult male is a normal random variable with mean…

A:

Q: Vehicle speeds at a certain highway location have a mean of 100 kmh and a standard deviation of 10…

A: Given,sample size(n)=25sample mean(x¯)=100standard deviation(σ)=10α=1-0.95=0.05α2=0.025Z0.025=1.96…

Q: surveying used by anomalles arising from varlations susceptibimty mighi ndicate an important…

A: The formula for calculating the conditional probability is:

Q: Using a chi-square distribution to test a population variance, the appropriate critical value for a…

A: Answer  sample size [n] = 17 Degree of freedom =n-1 =17-1= 16 Level of significance =α=0.10 Type of…

Q: If z is a standard normal variable, find the probability: P(-0.73 < z < 2.27)   Remember to use…

A:

Q: The diameter of the dot produced by a printer is normally distributed with a mean diameter of 0.002…

A: Solution

Q: Let the random variable Z .10 follow a standard normal ?distribution , What is P(Z > -0.21)

A: To find the probability value, use the standard normal table to find the P(Z&gt;-0.21).

Q: Data on the weights of the contents of cans of diet soda versus the contents of regular soda is…

A: Solution: Given information: n1=33 Sample size of diet sodax1=0.78767lb Sample mean of diet…

Q: The probability that an observation taken from a standard normal population will have a z greater…

A: From the standard normal distribution table, the probability that an observation taken from a…

Q: Cholesterol levels for women ages 20-34 are approximately normally distributed with a mean of 185…

A:

Q: A researcher wants to know if there is a difference between the mean amount of sleep that people get…

A: Unemployed(Group 1) Part Time Worker(Group 2) Full Time Worker(Group 3) 9 8 7 7 7 9 8 7 7 9…

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

A: Given : For sham x̄1 = 0.38 s1 = 1.31 n1 = 12 For treatment x̄2…

Q: Find the indicated probability. Empirical evidence shows that the "normal" resting adult body…

A: Given information Mean µ = 98.2 Standard deviation σ = 0.7 Probability that a randomly selected…

Q: The standard normal distribution O Both A and C O C. has a positive mean and a positive variance OA.…

A: Normal distribution  X~N(μ, σ) Mean=μ, standard deviations= σ

Q: Magnetic surveying is one technique used by archaeologists to determine anomalies arising from…

A: From the table you can see that probability that the reading is very interesting = 0.05 a. Hence…

Q: Determine which of the following are characteristics of a normal curve. 1. The mode and median occur…

A: Here we have to identify the correct statement about Normal curve

Q: has a different lifespan in water at a 0.05 level of significance. Sunscreen A Sunscreen B Sunscreen…

A: Given Information :  A sunscreen company is attempting to improve upon their formula so that it…

Q: esearcher expects a treatment to produce an increase in the population mean. Assuming a normal…

A: 1. According to the sum, A researcher expects treatment to produce an increase in the population…

Q: What is the probability that an observation taken from a standard normal population will have Z…

A:

Q: Consider a binomial setting in which "neutral" is defined to be a success. So, p = P(success) = P(10…

A: i) We have, n=45 , p=0.5

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.