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A researcher wants to estimate the passing rate of Stats cou…

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)

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The ABC Light Bulb Company claims that their light bulbs hav…

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) 

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The weights of packages shipped by a company have a populati…

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)

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An educational researcher claims that the mean GPA for Psych…

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)

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A survey claims that 9 out of 10 doctors (i.e., 90%) recomme…

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)

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What is the default scope of a variable defined inside a fun…

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

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

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

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What will be the output of the following code snippet? my_li…

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

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Create a function calculate_grades that accepts a list of st…

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   

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What is the result of “Hello” * 3?

What is the result of “Hello” * 3?

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