A researcher wants to estimate the passing rate of Stats courses at FIU with a margin of error of 3 % and a confidence level of 90 % . If the passing rate is believed to be around 70 % , what sample size is needed ? ( Use z=1.645)

The ABC Light Bulb Company claims that their light bulbs have an average lifespan of 900 hours, with a standard deviation of 100 hours. If the quality control team randomly selects 70 light bulbs for analysis , what is the probability that the average lifespan for the sample will exceed 920 hours? ( Round to two decimal places) 

The weights of packages shipped by a company have a population mean of 40 pounds and a population standard deviation of 12 pounds. The distribution of individual package weights is strongly right-skewed. A random sample of 64 packages is selected.  What is the probability that the sample mean weight is less than 37 pounds? ( round to three decimal places)

An educational researcher claims that the mean GPA for Psychology students at a certain college is less than 3.2 . A sample of 49 Psychology students gave a mean GPA of 3.1 with a standard deviation 0.35 . What is the value of the test statistic used to test the claim ? ( Do not round)

A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have children. To test this claim against the alternative that the actual proportion of doctors who recommend brand Z is less than 90%, a random sample of 100 doctors results in 83 who indicate that they recommend brand Z. The test statistic in this problem is approximately (round to the nearest hundredth)

What is the default scope of a variable defined inside a function?

Find the output  x = 100def func():    global x    x = 200    print(x)func()print(x)

What will be the output of the following code snippet? my_list = [1, 2, 3, 4, 5]print(my_list[2:4])

Create a function calculate_grades that accepts a list of student scores (as positional argument) and a default passing_threshold=40. It should return a dictionary with: ‘passed’: list of scores >= passing_threshold ‘failed’: list of scores < passing_threshold 'average': average of all scores (rounded to 2 decimal places) 'highest': the highest score Use control structures to categorize the scores. def calculate_grades(scores, passing_threshold=40):    # Write your code here   

What is the result of “Hello” * 3?