1. If the population has a variance of 16 units, what is the variance of the mean if sample of size 5 are selected? A. 0.8 B. 2 C. 3.2 D. 4 2. What is the probability of each rejection region in a normal distribution of two – tailed test given the level of significance α = 0.01? A. 0.001 B. 0.005 C. 0.01 D. 0.05 3. Suppose the probability of committing Type I error increases. What will happen to the probability of committing Type II error? A. The probability of committing Type II error will decrease. B. The probability of committing Type II error will be doubled. C. The probability of committing Type II error will be the same. D. The probability of committing Type II error will also increase.

Q: Suppose that the random variable X represents th If E(X) 9 and V(X) 0.25, wh millimeters. Meani…

A: Let X be a random variable that represents the length of a punched part in the centimeters.Let Y be…

Q: Two samples each have n = 4 scores. The first sample has a variance of s2 = 10 and the second sample…

A: The estimated standard error for the sample mean difference is given by, standard error=s12n1+s22n2…

Q: wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to…

A:

Q: What is the explained variance and unexplained variance. correlation coefficient, is .771…

A: Determine the value of explained variance.   The value of explained variance is determined below as…

Q: A random sample of size 36, taken from a normal population, has a mean of 100. A second random…

A:

Q: Given that the entire population of a certain set of data comprises { 2, 1,3}. Compute the true…

A: The data set is {2,1,3}.

Q: Results of an analysis of variances produce SS between = 20, SS within = 30, and an F-ratio with df…

A: Given information- Sum of squares (SSbetween) = 20 Sum of squares (SSwithin) = 30 Degree of freedom…

Q: ppose Y follows binomial distribution with mean=20 and variance =7, what is the values a ccess, p?…

A:

Q: Consider a normal population with a mean of 10 and a variance of 4. Find P(X < 6).

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Q: What should be the average height of the population

A: Here The 5% of a certain population have height above 160cm. Suppose the height of the said…

Q: Response to allergen inhalation in allergic primates. In a study of 12 monkeys, the standard error…

A: From the provided information, Sample size (n) = 12 Standard error (SE) = 0.4

Q: The annual earnings of 25 people with a high school diploma and 16 people with an associate’s degree…

A: We have given that  High School Diploma Associates degree X1 = $36,875 X2= $44,900 S1= $5475…

Q: Suppose Y is distributed with mean=80 and variance=100. You obtain a large number of samples each of…

A:

Q: A cample mean is computed from a population with a variance of 2.45. The sample size is 40. The…

A: Given,variance(σ2)=2.45standard deviation(σ)=2.45sample size(n)=40

Q: For a population that is normally distributed with a very large population size compared to the…

A: The sampling distribution of sample mean follows normal distribution with mean, μx=μ and standard…

Q: The sum of the squared deviation scores is SS = 20 for a sample of n = 6 scores. What is the…

A: The variance of the sample can be calculated as:

Q: If 446 rods are sampled at random from the batch, what is the probability that the mean length of…

A: Here we have given information, A batch of steel rods produced at a steel plant have a mean length…

Q: The filling machine at a bottling plant is operating correctly when the variance of the fill amount…

A: The variance of the fill amount in ounces is equal to 0.3. The number of sample bottles is equal to…

Q: If C.V.=11. 23 and variance is 6.7832 then mean = a. 0.231919 b. 0.60402 c. 60.4024 d. 23.1919

A: Given information- Coefficient of variation, C.V. = 11.23 Variance, σ2= 6.7832 Therefore, the…

Q: sample of 100 observations was taken from a large population. The sample mean and the variance was…

A: Solution: Given information: n= 100  Sample size x=80  Sample mean s2=144 Sample variance s=s2s=…

Q: Mrs. Santos administered a Science Achievement Test to a random 45 graduating SHS students. In this…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Suppose that the distribution of diastolic blood pressure in men aged 35-44 years follows a normal…

A: For the distribution of the diastolic blood pressure, the parameters are given as follows:The mean,…

Q: If C.V.=6.8 and variance is 4.36141 then mean = a. 30.7117 b. 64.138 c. 641.38 d. 307.117

A: Given,C.V=6.8variance (σ2)=4.36141

Q: Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone…

A: Given Population mean μ=4.1, n=sample size=66, sample mean x̄=4.3, sample variance=s2=1, level of…

Q: SAT scores are normally distributed with a mean of 1,800 and a variance of 22,500. Given arandom…

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Q: Which of the following sets of data would produce the largest value for Cohen’s d if the difference…

A: Given that, the difference between the samples is 5 points.

Q: 2) A t-distribution has a variance known to be 1.25. What is the degrees of freedom for this…

A: We want to tell you which one is the correct choice.

Q: A random sample of size 16 is to be taken from a normal population having mean 100 and variance 4.…

A: Sample size = 16 Mean = 100 Variance = 4

Q: Suppose that the random variable X represents the length of a punched part in centimeters. Let Y be…

A:

Q: A geologist is making guesses about the mean length of fossil teeth of a certain species found in a…

A: From the provided information,

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Q: 16. Standardized test scores are normally distributed with an average of 500 and a variance of 100.…

A: From the provided information, Mean (µ) = 500 Variance (σ2) = 100 Standard deviation (σ) = 10 X~N…

Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

A:

Q: Assume that the average score on a statistical test is 8.5 and the variance is 2. The test was or he…

A: The sampling distribution of a statistic is known as the probability distribution of all the…

Q: Q5. A random sample of size n = 10 from a normal population has mean = 5.68 and a standard deviation…

A: Here, α=0.05, n=10, and s=0.29.