In a poll conducted by the General Social Survey, 81% of respondents said that their jobs were sometimes or always stressful. Suppose a sample of 500 adults is takes and the proportion that say their jobs were sometimes or always stressful is recorded. Using the values for the mean and standard deviation you selected above, what is the probability that less than 78% of the 500 respondents say their jobs were sometimes or always stressful?

Q: set of data has a histogram that is extremely skewed, what does this tell you about the data and how…

A: A set of data has a histogram that is extremely skewed, we have to estimate the distribution of the…

Q: expected number of students who read the book online.

A: Students purchased hard copy =P(H) = 60% =0.60 Students print out from the web =P(W)= 25% = 0.25…

Q: A college conducts a common test for all the students. For the Math portion of this test, the scores…

A:

Q: According to the Department of Education, 60% of college students enjoy taking Statistics. Suppose…

A: Let  X be the number of students who enjoy taking Statistics in a sample of 200. Given n = 200…

Q: The top 5% of applicants on a test will receive a scholarship. If the test scores are normally…

A: According to the given information in this question We need to find the lowest score

Q: 9% of all cars fail the emissions inspection, find the probability that in a sample of 125 cars, 16…

A: Given n=125 P=0.09

Q: A flu test shows that about 31% of 90 patients visited hospital in the first week of January had…

A: Given that  n = 90 , p = 31% = 0.31 , q = 1 - p = 1 - 0.31 = 0.69 X ~ Binomial (n = 90 , p = 0.31) X…

Q: A teacher wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10%…

A: Here we need to find the mean, median and mode for the given normal distribution. Also we need to…

Q: In company XYZ, the success of an email to land into a spam folder is 4%. If an account received 20…

A: Solution To find the probability we will use Excel  Given data is  n= 20

Q: The middle 95% of a group of 1000 students got scores ranging from 50 to 90 on a math test. If the…

A: Normal Distribution: Understand the properties of the normal distribution, including the mean (μ)…

Q: Suppose the mean GPA of BYU-Idaho students is 3.5 and the standard deviation is 0.7. It is well…

A: Define a random variable X, that is GPA of students.

Q: If 500 students take the same exam, and the results form a normal distribution, what is the…

A: We have given that n=500 Mean=M, Standard deviations=S

Q: A distribution has a mean of 75 and a median of 70. This distribution is probably positively skewed

A:

Q: Suppose that the mean IQ in the United States is roughly100 and the standard deviation is 15 points.…

A: Given: Meanμ=100Standard deviationσ=15 Consider, X be the random variable that follows the normal…

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: A sample of students  in a  college  take a statistics test has a mean score of 78.2 ,a mode of 67,…

A: Given : Mean = 78.2 Mode = 67 Median = 67

Q: About 75% of all female heart transplant patients will survive for at least 3 years. Sixty female…

A:

Q: For a standardized psychology examination intended for psychology majors, the historical data show…

A:

Q: A professor wants to know if her Psychology statistics class has a good grasp of Ba math. Six…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Suppose you have a distribution with a mean equal to 10, median equal to 20, and mode equal to 30.

A:

Q: A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly…

A: From the given information, the mean is 105 and the standard deviation is 20.

Q: Suppose the mean GPA of BYU-Idaho students is 3.5 and the standard deviation is 0.7. It is well…

A: The population mean is 3.5 and standard deviation is 0.7. The sample size is 81 (n).

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.