A researcher used the sample median as a measure of center instead of the sample mean. What do you think could have informed his decision and why?  2.) An investigator decided to conduct a research to describe the average number of females in each family. Considering the case of  200 families in the town. Describe what may contribute to the difference between the value of the sample statistics and its corresponding population parameter.

Explain Properties of the Sample Mean?

Please dont use Excel. Calculate to paper with detail.

I need help with something regarding this problem.  The National Sleep Foundation recommends that adults aged 18 to 64 get an average of 8 hours of sleep per night. A survey of sleep hours was taken during a Statistics class. The data is listed below:   4, 5, 5, 5, 5.5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 10, 10   Do we have enough evidence at the 0.05 significance level to say that statistics students tend to get less sleep than the recommended average of 8 hours per night?   How would I get the degrees of freedom?

doesn't the mean of a sample population equal the true proportion?

Someone claims that, since the mean of the sampling distribution equals the population mean, any single sample mean must also equal the population mean. Explain?

Please answer the question completely

A psychologist has designed an index to measure the social perspectives of elementary school children. The index is based on ratings of a child’s responses to questions about a set of photographs showing different social situations.  The following are the indices measured on a random sample of 16 children attending elementary school in a particular district.   48, 75, 69, 58, 60, 68, 59, 66, 71, 52, 49, 60, 54, 55, 70, 57   For the data the mean index is 60.69 and the standard deviation is 8.26. The confidence interval is 95%, with a level of significance of 0.05. Perform a statistical test to determine if the population mean index is greater than 50. a) Name of hypothesis test:   b) H0:   c) HA:   d) Test Statistic:   e) Rejection region:   f) Decision in the context of the problem:

Press Esc to exit full screen Class Вoys Girls Ms.Rangel 10 6. Ms.Isais 7 Mr.Gomez 8 8 Mr.Hernandez 11 5 Find: Mean Median Mode Range

From the set of numbers 10,17,19,20,22 The mean is 17.6 Median is 19 Mode is no mode. make 1st, 2nd, and 3rd quartiles, then sketch a box and whisper plot.