Make up a sample of size n = 6 for which the average is −7 (note the (−) sign). Not all 6 numbers should be identical.
All six members are identical.
Given, n = 6 , Mean = -7
Mean =
X / n
-7 =
X / 7
X
= -49
Therefore,
Value of single sample = -49 / 7 = -7
Sample = -7 , -7 , -7 , -7 , -7 , -7
[ Here since all members are identical, value of single member = average = -7 ]
4 5 6 7 Find the minimum sample size n needed to estimate μ for the given values of c, o, and E. cz 0.95, σ 6.3, and ΕΞ2 Assume that a preliminary sample has at least 30 members 9n-(Round up to the nearest whole number) 10 12 13 14
R2. Let X ~ N(μ 10.82). Following up on R1, we will be approximating μ2, which we can see should be 100, For now, let the sample size be n = 3, Pick 3 random numbers from X, compute X., and repeat the process a total of 50000 times. Plot a smooth version of the histogram of these 50000 values for X: the plot(density(.. command in R wll be useful. Now find the average of your 50000 values and make...
A random sample of size n = 472 is taken from a population of size N = 9,700 with mean μ = −63 and variance σ2 = 176. [You may find it useful to reference the z table.] A-1 Is it necessary to apply the finite population correction factor? Yes No a-2. Calculate the expected value and the standard error of the sample mean. (Negative values should be indicated by a minus sign. Round "standard error" to 2 decimal places.)...
#7 Find the minimum sample size n needed to estimate mu for the given values of c, sigma, and E. c=0.90, sigma=7.4, and E=2 Assume that a preliminary sample has at least 30 members. n=_ (Round up to the nearest whole number.)
In a systematic random sample of size n drawn from a population of size N, how many random numbers need to be generated to identify those subjects who are included in the sample? n N/n N-n 1 n-1
6.-. What size should a sample be to estimate the average of a population that follows a normal distribution in each of the following cases? a.ME = 5; ? = 40; ? = 0.01 b.ME = 10; ? = 40; ? = 0.01 c. Compare and comment the answers to sections (a) and (b).
6. A sample of size n- 200 has a known population standard deviation of 15.0. The population appears to be skewed. Determine whether a margin of error should be calculated using a critical value of za, a critical value of ta/2, or neither. Oa critical value of ta2 O a critical value of za O neither 7. The mean of a sample size n 35 is 1860. The standard deviation of the sample is 102 and the population is normally...
4. Suppose the population proportion is p = .6 and N=212000. What sample size is required for the sample proportion to be normally distributed? 5. If a population is slightly skewed and my sample size is 12, is the sample normally mean distributed? me a normal distribution for If n-83 what is the smallest population size N that will give 6.
4. Suppose the population proportion is p = .6 and N=212000. What sample size is required for the sample...
The following is a set of data from a sample of size n( n=7): 16 , 7 , 2, 2 , 10, 11, -6. 1) Find the mean of the data set A) 7 B) 7.28 C) 6 D) 2 2) Find the mode of the data set A) 6 B) 2 C) 7 D) 7.28 3) Find the standard deviation of the data set A) 53 B) 7.28 C) 6.74 D) 318 4) The five-number summary of the data...
Determine the sample size needed to construct a 95% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.2. Assume the standard deviation of the GPA for the student population is 25 The sample size needed is (Round up to the nearest integer.) Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion for the following sample proportions when the margin...