A researcher takes a sample from a population and computes a statistic for the sample. Which of the following statements is correct?a. If the sample statistic overestimates the corresponding population parameter, then the statistic is biased.b. If the sample statistic underestimates the corresponding population parameter, then the statistic is biased.c. If the sample statistic is equal to the corresponding population parameter, then the statistic is unbiased.d. None of the above

Find the​ range, variance, and standard deviation for the given sample​ data, if possible. If the measures of variation can be obtained for these​ values, do the results make​ sense? Biologists conducted experiments to determine whether a deficiency of carbon dioxide in the soil affects the phenotypes of peas. Listed below are the phenotype​ codes, where 1 equals ​smooth-yellow, 2 equals ​smooth-green, 3 equals wrinkled ​yellow, and 4 equals ​wrinkled-green.   a. The range of the sample data is ​(Type an integer or a decimal. Do not​ round.)   b. the standard deviation of the sample data is ​(Round to one decimal place as​ needed.)   c. The variance of the sample data is ​(Round to one decimal place as​ needed.)

Which of the following statistics are unbiased estimators of the population parameter? Select all that apply. A) Sample mean B) Sample proportion C) Sample range

A. For which data set is the sample correlation coefficient r closest to −1? B. For which data set is the sample correlation coefficient r closest to 0? C. For which data set is the sample correlation coefficient r equal to 1?

The following sample was obtained from the population. 13,7,6,12,0,4 a) Compute the sample mean.

Determine whether the following sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative. A researcher wishes to compare annual salaries of patients with and without narcolepsy. She obtains a random sample of 116 patients of each category who work and determines each patient's annual salary. ... Determine whether the following sampling is dependent or independent. OA. The sampling is dependent because an individual selected for one sample does dictate which individual is to be in the second sample. OB. The sampling is dependent because an individual selected for one sample does not dictate which individual is to be in the second sample. OC. The sampling is independent because an individual selected for one sample does dictate which individual is to be in the second sample. D. The sampling is independent because an individual selected for one sample does not dictate which individual is to be in the second sample. Indicate whether the…

4. Given the sample data in the table below: 12 10 15 19 23 5 12 10 12 19 10 19 34 19 19 15 a) Determine the mean, median, and mode of this data. Please show your work! 5 12 b) Determine the range and inter-quartile range of this data. Please show your work!

The data below show sport preference and age of participant from a random sample of members of a sports club. Is there evidence to suggest that they are related? Frequencies of Sport Preference and Age Swimming 85 ATTI Tennis Basketball 18-25 98 88 26-30 104 100 46 31-40 62 63 40 54 30 Over 40 63 What can be concluded at the = 0.10 significance level? a. What is the correct statistical test to use? O Homogeneity O Paired t-test O Goodness-of-Fit O Independence b. What are the null and alternative hypotheses? Ho: O The age distribution is the same for each sport. The age distribution is not the same for each sport. O Age and sport preference are dependent. O Age and sport preference are independent. H1: O Age and sport preference are independent. O The age distribution is not the same for each sport. O Age and sport preference are dependent. O The age distribution is the same for each sport.