Statistics

posted by .

One sample of n=20 scores has a mean of M=50. A second sample of n=5 scores has a mean of Mean=10. If the two samples are combined, what is the mean

  • Statistics -

    Mean =∑x/n

    50 = ∑x/20

    ∑x = 100

    10 = ∑x/5

    ∑x = 50

    Mean = 150/25 = ?

  • Statistics -

    cf23

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. statistics

    -A set of seven scores has a mean of 10. If one of the scores is changed from X=15 to X=1, what will be the new value for the new mean?
  2. statistics

    A sample of n=5 scores has a mean 50. Another sample has n=10 scores and a mean of 60. If the two samples are combined, will the combined sample mean be greater than 55
  3. Statistics

    For a population with a mean of (mew) = 50 and a standard deviation of 10, how much error, on average, would you expect between the sample mean (M) and the poulation mean for: a) a sample of n=4 scores b) a sample of n=16 scores c) …
  4. statistics

    a distribution of scores has 6, but the value of the mean is unknown, a researcher plans to select a sample from the population in order to learn more about the unknown mean, if the sample consist of n= 9 scores , how accurately should …
  5. probability and statistics

    a population forms a normal distribution with a mean of u=80 and a standard deviation of o=15. for each of the following samples, compute the z-score for the sample mean and determine whether the sample mean is a typical, representative …
  6. statistics

    IQ scores are normally distributed with a mean of 105 and a standard deviation of 18. Assume that many samples of size n are taken form a large population of people and the mean IQ score is computed for each sample. If the sample size …
  7. Statistic

    For a population with a mean of μ  70 and a standard deviation of   20, how much error, on average, would you expect between the sample mean (M) and the population mean for each of the following sample sizes?
  8. Math

    I need help with this these two problem PLEASE!!! For a population with a mean of μ  80 and a standard deviation of   12, find the z-score corresponding to each of the following samples. a. M  83 for a sample of n  4 scores …
  9. Statistics

    For a population with a mean of ยต=60 and standard deviation of Ợ=24, find the z=score corresponding to each of the following samples a. M=63 for sample of n=16 scores b. M=63 for sample of n=36 scores c. M=63 for sample of n=64 …
  10. Statistics Mean and Median Question

    Statistics Find The Mean and Median Question 28. IQ Scores: Use the listed IQ scores. IQ tests are designed so that the mean IQ of the population is 100. Does the sample mean suggest that the sample is consistent with the population?

More Similar Questions