The standard deviation of a variable is 15. If a sample of 100 individuals is selected, what size is necessary to double the standard error of the mean? a) 200 b) 400 c) 50 d) 25

Q: The number of observations in a population is said to be the size of population. O True False

A: Here we want to know given statement is true or not.

Q: Illustration : The mean and standard deviation of a set c 100 observations were 40 and 5 respective…

A: Mean is the average value of given observations. For a set of 'n' observations, mean is the sum of…

Q: The standard deviation of a 1500 volume population is 54'cm. In the case of "non-refundable…

A:

Q: Calculate the standard deviation of a distribution with: n = 15, f= 110 = 1235 77 O 9.364 O 7.333 O…

A: Given,n=15∑ix.f=110∑ix2 .f=1235

Q: The degrees of freedom for the sample containing 10 measurements is v = 10. True False

A:

Q: Given the mean and standard deviation of a normally distributed set of scores, determine the…

A: Given that  x = 35 ,  μ = 18 , ? = 7

Q: 4. The mean of fifty sales receipts is $58.35 and the standard deviation is $10.38. Using…

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Q: average heigth is 163 cm, standart deviation is 10 cm. compute p(X>168 cm) ?

A: Given,μ=163σ=10P(X>168)=?

Q: Calculate the necessary minimum sample size for a good mean estimate given that za/2 = 0.6, g = 4.1,…

A:

Q: The heights of students from a certain school are normally distributed with mean 106 cm and standard…

A: x=100.64

Q: The Central Limit Theorem may be used to conclude that the sampling distribution of me 20.…

A: Central limit theorem is one of the important theorem in statistics is used to determine whether the…

Q: The heights cleared by two athletes in a high jump event are recorded bellowed. Athlete X: 1.86 m,…

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

Q: The table shows the distribution of sizes of uniforms in UPANG. Calculate the standard deviation of…

A:

Q: For a distridution Bowley's coefficient of skewness is – 0.56, Q = 16.4 and median = 24.2. What is…

A:

Q: Find the standart deviation 18- Standart sapmayı bulunuz 5 8 12 14 O A) 2 O B) 4 C) 1 O D) 3 O E) 5

A: Given data :  5  8  12  14 n = 4

Q: If X~N(100, σ 2 ) and P(X < 106) = 0.8849, find the standard deviation, σ.

A: Here,X~N(μ,σ2)so,Here X~N(100,σ2)   → 1

Q: The arm span and foot length were measured (in centimeters) for each of the 19 students in a…

A: From the graph, the straight line in the graph is the regression equation

Q: The appropriate interval width for a random sample of 100 observations that fall between 50 and 250…

A: The number of classes is given by Sturge's formula n=1+3.322log(N)=1+3.322*log(100)=7.644≈8 Interval…

Q: Find t, for a 95% confidence interval for the population mean. The sample size is 30. O a. 1.699 O…

A: The random variable X follows normal distribution. The level of confidence is 95%. The sample size…

Q: When estimating the proportion of Ole Miss students that support moving the Confederate statue, how…

A:

Q: The random variable, x, has a normal distribution. How many standard deviations above the mean must…

A: Given The random variable, x, has a normal distribution.

Q: ith a mean of 110 and standard dev. of 15, find the 3 unique deviations to the left and right of the…

A: Deviations to the left   i) One standard deviation away from mean x = u - s x = 110 - 15 = 95   ii)…

Q: Length Area 37 53 30 45 25 30 25 39 43 60 31 49 43 60 38 57 What is the lower…

A: Regression line are used to predict the future variable. Prediction interval are used to predict the…

Q: The symbol μ¯xμx¯ represents the mean of a sample of size n. True False

A: The given statement is TRUE. Because, the symbol µx-bar represents the mean of a sample size, n

Q: Given that s.e.(b) = 61 and the estimate is 32, what is the t-stat?

A: GivenSEβ=61Estimate(β)=32

Q: The standard deviation of a population of 10000 volume is 62cm. In the case of "non-refundable…

A: The formula for sample size for a given confidence interval and population standard deviation is:

Q: The appropriate interval width for a random sample of 100 observations that fall between 50 and 250…

A: We find the number of intervals using the Sturge's formula n=1+3.322log(n)=1+3.322*log(100)=7.644≈8…

Q: With 95% confidence, what is the margin of error when estimating a population mean when n = 100 and…

A:

Q: For the population with a mean of 50 and a standard devitation of 8, find the z-score and standard…

A: Let X denotes the random variable that measures the particular characteristic of interest. Let, X1,…

Q: d. Compute the first and third quartiles. e. Which measure, the mean or median, is a better measure…

A: The data can be sorted in ascending order as: 28, 29, 30,39, 41, 48, 48, 49, 51, 62

Q: A population has a mean of 80 and a standard deviation of 8. Ai ralue is ndom sa O A. None of the…

A: As the sample size is higher than 30 it can be said that the distribution follows a normal…

Q: d the population standard deviation for the number of smallmouth bass caught per day by each nt…

A: The formula to compute the population standard deviation is,

Q: According to the central limit theorem, if a sample of size 56 is drawn from a population with a…

A:

Q: Find the standart deviation 8 11 14 17 19 21 21 12 13 a) 4,622 B) 3,642 NS) 2,548 D) 8,722 TO) 1,432

A: From the provided information, The data values are as follow: 8, 11, 14, 17, 19, 21, 21, 12, 13…

Q: Calculate the means and standard deviations of:37, 26, 19, 21, 19, 25, 17 O a. 3; 7.141 b. 3;2.414…

A: Given n=7 37,26,19,21,19,25,17

Q: A major cab company in Chicago has computed its mean fare from O'Hare Airport to the Drake Hotel to…

A:

Q: are u and o², respectively. Hence, the stan- The mean and variance of n(x; µ, o) dard deviation is…

A:

Q: is the range of tree height within one standard deviation of the mean? Wilat O 35 to 75 O 5 to 105 O…

A: We have given that, The hights of the tree are, 31, 41, 64, 107, 43, 32, 39, 41, 55, 39, 104, 53, 65…

Q: Both sets of values have an average of 13. It's Set A's standard deverarion smaller, larger, or…

A: Average of both sets are= 13 The set A has the smallest value=1 and largest value=25  The set B has…

Q: The weights of a certain dog breed are approximately normally distributed with a mean of u = 53…

A: Given: μ = 53σ = 5

Q: Given that the mean = 20 and the standard deviation o = 4, find P(x < 25).

A: Mean is 20 and the standard deviation is 4.

Q: Find the standard deviation for the given data n 64, Σίx, = 44 1 , Σίx? = 495917 ,Σχ, = 188 O a.…

A: SD = n∑f.x2 -∑f.x2n(n-1)

Q: In estimating the sample size necessary to estimate p, if there is no good approximation for the…

A: Denote p as the true proportion and the point estimate of p is p̂ = x/n, where x denotes the number…

Q: Given Mean = 50, C.V. = 40%, Karl PearsonS Coefficient of Skewness = -0.4 Find standard deviation…

A: According to the given information, we have Mean = 50 Coefficient of variation, C.V. = 40% Karl…

Q: given by ju = 143 b and a standard deviation given by o = 29 lb. (a) ff 1 woman is randomly…

A:

Q: N. The acores of the 7 rendomly selected students are given below 165 31 22 27 35 35 17 Complete the…

A: Given : Sample size (n)=7 Scores 35 15 22 36 17 31 27

Q: Given that the mean μ=20 and the standard deviation σ=4, find P (x<25)

A: Given that. X~N( μ , ?2 ) μ = 20     , ? = 4 Z-score =( x - μ )/?