(6) 2. A data set has a distribution that is skewed left with a mean of...

(6) 2. A data set has a distribution that is skewed left with a mean of 88 and a standard deviation of 22. I take 30,000 samples each of size 20 from this data set. Then the sampling distribution of sample means will have

a) Mean = _______ b) standard deviation = ____________ c) What shape distribution? __________

(8) 3. The number of miles driven on trips for Thanksgiving is normally distributed with a mean of 120 miles and a standard deviation of 30 miles. What is the probability a sample of 48 trips would have an average mileage driven over 130 miles?

Expert Solution

orchestra answered 1 year ago

Using the data set, construct a histogram of the sales data. Is the data set unimodal or multimodal? Is the dataset left skewed, right skewed, or symmetric?

SALES 3119.192 3975.566 4871.707 6854.398 7695.537 6700.062 6868.331 6236.983 4631.669 3923.082 3116.163 2903.342 3362.867 4870.157 5787.586 6256.58 7381.073 8491.757 6865.594 6376.925 5719.524 4507.048 3527.814 3428.527 4079.148 5088.518 5889.149 7452.386 8106.338 8222.292 8188.105 7271.335 5996.201 4741.099 4043.184 3638.955 4386.81 5415.423 6842.519 8376.721 8602.59 8163.972 7908.729 7751.455 6289.906 5492.67 4599.471 4061.198 Using the data set, construct a histogram of the sales data. Is the data set unimodal or multimodal? Is the dataset left skewed, right skewed, or symmetric?

Are these data skewed to the left (negatively skewed) or skewed to the right (positively skewed)?...

Are these data skewed to the left (negatively skewed) or skewed to the right (positively skewed)? 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 9, 1850

Example of a situation where a data set might be negatively skewed. Do the same for a positively skewed distribution.

Example of a situation where a data set might be negatively skewed. Do the same for a positively skewed distribution. As this is a discussion, check the other answers first to make sure your answer isn't already taken. If necessary, explain why the skews might be the way they are.

Question: A set of data has a normal distribution with a mean of 53 and a...

Question: A set of data has a normal distribution with a mean of 53 and a standard deviation of 6. Find the... A set of data has a normal distribution with a mean of 53 and a standard deviation of 6. Find the percent of data within each interval... a. from 47 to 65 b. from 41 to 47 c. greater than 59 d. less than 65 Please show all steps. Note: a - d are NOT potential answers, they...

A set of data has a normal distribution with a mean of 47 and a standard...

A set of data has a normal distribution with a mean of 47 and a standard deviation of 7. Find the percent of data within the following interval. less than 47

The TEST grade of a statistics class has a skewed distribution with mean of 79 and...

The TEST grade of a statistics class has a skewed distribution with mean of 79 and standard deviation of 8.2. If a random sample of 35 students selected from this class, then what is the probability that average TEST grade of this sample is between 76 and 82? Answer: (round to 4 decimal places) The average amount of water in randomly selected 16-ounce bottles of water is 15.87 ounces with a standard deviation of 0.55 ounces. If a random sample...

Let x be a continuous random variable that follows a distribution skewed to the left with...

Let x be a continuous random variable that follows a distribution skewed to the left with ?= 92 and ?=15. Assuming n/N <= .05, find the probability that the sample mean, x bar, for a random sample of 62 taken from this population will be (ROUND ANSWERS TO FOUR DECIMAL PLACES): a) less than 81.5 P(less that 81.5)= b) greater than 89.7 P(greater than 89.7)= Please show your work.

The distribution of GPA scores is known to be left-skewed. At a large university, the administration...

The distribution of GPA scores is known to be left-skewed. At a large university, the administration is interested in learning about the average GPA score of the undergraduate students. A simple random sample of 75 undergraduates results in an average GPA score of 2.97. Assume that the distribution of GPA scores of the undergraduates at this university is also left-skewed with a standard deviation of 0.62. (a) Which of the following statements is true? A. The sampling distribution is normal....

For each of the following, determine whether the distribution described is more likely skewed right, skewed left, or relatively symmetric.

For each of the following, determine whether the distribution described is more likely skewed right, skewed left, or relatively symmetric.Number of sick days in the GC student populationSalaries for all players in the NFLNumber of cars owned per American citizenHeights of all females in the GC population

he final exam grade of a statistics class has a skewed distribution with mean of 78...

he final exam grade of a statistics class has a skewed distribution with mean of 78 and standard deviation of 7.8. If a random sample of 30 students selected from this class, then what is the probability that average final exam grade of this sample is between 75 and 80?

Question