3) A researcher records the following scores on a working memory quiz for two samples. Which sample has the largest standard deviation? Sample A: 2, 3, 4, 5, 6, 7, and 8 Sample B: 4, 5, 6, 7, 8, 9, and 10

Please answer all the questions and is possible how what to plug in on blank spots thanks

please give some detailed solution and please do not copy other's work,thanks!! According to a union agreement, the mean income for all senior-level assembly-line workers in a large company is $500 per week. A representative of a women's group decides to analyse whether the mean income for female employees matches this norm. For a random sample of 50 female employees, the mean is $410 and the SD is $90. Test with a-0.05, whether the mean income of female employees differs from $500 per week. What is the probability of the Type II error in this case?

Please answer all questions and show work

*PLEASE show in excel A different investigator conducts a second study to investigate whether there is a difference in mean PEF in children with chronic bronchitis as compared to those without.  Data on PEF are collected and summarized below.  Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without?  Run the appropriate test at a=0.05.    Group Number of Children Mean PEF Std Dev PEF   Chronic Bronchitis 25 281 68   No Chronic Bronchitis 25 319 74           Step 1. Set up hypotheses and determine level of significance.   Ho:         H1:         alpha:                   Step 2. Select the appropriate test statistic and give its formula.                                           Step 3. Set up decision rule.                             Step 4. Compute the test statistic                                               Step 5. Conclusion.

The Credit Risk Department of a major bank estimates the default rate on loans under $10,000 to be 4%. The bank will make 2400 loans that are under $10,000 next month.  Find the mean of ^p, where ^p is the proportion of defaults on the 2400 loans under $10,000 to be made next month.

Historically, the proportion of students entering a university who finished in 4 years or less was 63%. To test whether this proportion has decreased, 120 students were examined and 52% had finished in 4 years or less. To determine whether the proportion of students who finish in 4 year or less has statistically significantly decreased (at the 5% level of signficance), what is the p-value? (please round your answer to 4 decimal places)

How is dfwithin and dftotal calculated in statistics? Please write out words for formulas.

Calculate the test statistic. (X^2)Enter your answer rounded to three decimal places.