8) a bag contours 5 blue, 4 red. marbles. A sample of 4 is taken and without replacement. Set up a p-df. for the number of blue marbles in the sample. b) Find the mean, SD. C cf Find the prob that the proportion of blue marbles in the sample > 1½/2

Thanks. Why is Kathy's score considered better-is it because it is a posituve score? What does the Z score represent in this case?

A veterinarian recorded how many kittens were born in each litter. This data is summarized in the histogram below. (Note: The last class actually represents "7 or more kittens," not just 7 kittens.) QUESTIONL: What is the frequency of the litter having at most 2 kittens? (PHOTO ATTACHED)

Here are the fuel efficiencies (in mpg) of 15 new cars. 49, 35, 17, 21, 27, 23, 45, 50, 39, 51, 41, 47, 25, 14, 29 What is the percentage of these cars with a fuel efficiency less than 40 mpg?

A researcher wants to determine the mean level of mercury found in 3 species of salt water shellfish: clam, oyster and crab. She randomly samples 100 shellfish of each species. She measures the amount of mercury in each specimen. 1. What is the experimental unit? [Select] 2. What is the response variable? [Select] 3. What is the factor? [Select] 4. What are the factor levels? [Select] > > > >

Find the median and lower quartile of the number of wins of the Mariners for 6 years.  Years and wins below: 2010/2011/2012/2013/2014/2015 71      61        72      86      89       95 A) Find the median. Show work. B) Find the lower quartile. Show work.

I need help with 5 a,b,c

A sales manager recorded the number of sales made by each of the 300 salespeople working athis chain of furniture outlet stores on a Saturday and created the following table.# Sales (bins) Proportion of salespeople in this bin0 – 3 0.053 – 6 0.156 – 9 0.30 9 – 12 0.3512 -15 0.15a. What is the unit of observation in this sample?b. What is the variable collected?c. Draw and label the histogram for this dataset.d. Which is the modal category?e. Calculate the proportion of the salespeople made 9 or more sales.f. Calculate the number of salespeople who made between 0 and 9 sales.

7. Find the z-score that cuts off a left tail whose area is 2.5%. 8. Find the z-score that cuts off a right tail whose area is 10.75%.

Given the 1st and 3rd quartiles of a data are 24 and 48, respectively, what value would be considered an outlier? A 83 B D 88 72 Can't tell.