## Statistics Resources

A waitress believes the distribution of her tips has a model that is slightly skewed to the left​, with a mean of ​\$10.10 and a standard deviation of ​\$6.20. She usually waits on about 50 parties...

If a gambler places a bet on the number 7 in roulette he or she has a 1/38 probability of winning. a.Find the mean and standard deviation for the # of wins of gambles who bet on 7, one hundred...

Draw a number line from 8 to 14. Show the frequency of each number. Title the dot plot. Show the frequency of each number. Title the dot plot. Draw a number line from 8 to 14. Title the dot...

I have 300 people doing a test and i have sorted them in 4 different groups according to their sight/vision (good and bad) and training (good and bad) . I want to find out which group would be the...

Obtain the daily trading data of the Straits Times Index (STI) from 2016 to 2018 (Today) for the data and Draw the distribution (histogram) of daily stock returns. Compute the first four mo-...

You are watching a video of a person flipping a coin and guessing whether it is heads or tails. Using the standard that an event is considered "usual" if the probability is under 0.05, state...

The ages of the winners of a cycling tournament are approximately normal. The mean age is 27.127.1 years, with a standard deviation of 3.83.8 years. The winner in one recent year was 3030 years old...

Consider the five number summary of hourly wages (\$) for a sample of sales managers. What is the IQR for these data? Min Q1 Median Q3 Max 20.94 37.64 44.77 49.34 67...

The following data represent the flight time (in minutes) of a random sample of seven flights from one city to another city. 286286, 269269, 259259, 265265, 256256, 263263, 257257 Compute...

I need to figure out how to run an ICC on a data set before moving forward with factor analysis. In my data, I have 78 teachers who have responded to questionnaire data for 5 students each, leading...

Q1. Where does all the water go? According to the Environmental Protection Agency (EPA), in a typical wetland environment, 40% of the water is outflow; 50% is seepage; 5% evaporates; and 5% remains...

I simply cannot figure out this problem! I thought that the level of significance would always be given to me. Usually, the problem says 5% significance, or whatever.    An urgent...

For the entire population of MMA fighters, the mean endurance is 30 with a standard deviation of 4.18. A distribution of the sample means is created on endurance with sample sizes of 12 and a standard...

This is a Statistics question that deals with,  with replacement and is supposed to be in 4 decimal places but if i could see the steps I could do the rest

Asked this only a few minutes ago and got a good answer.  It hadn't occurred to me, though, to mention that we need to answer the question using the z-score formula and z tables.