The histogram below gives the length of service of members of the Department of Chemistry at a particular university. The classes, in years of service, are 0−−4.9, 5−−9.9, etc., and the vertical axis represents the number of faculty. (a) What percent of the department faculty have less than 5 years of service? Answer:  ( 16 %) answer (b) If a member of the department is chosen at random to serve on a university committee, what is the probability (in decimal form) that the chosen representative will have between 10 and 35 years of service? Answer:  (c) What is the probability the representative above will have less than 5 years of service given that the person has less than 15 years of service?

Q: Find the percentage of data points that lie between -2.31 and 1.85.

A: Assuming the data follows standard normal distribution with mean 0 and standard Deviation 1Finding…

Q: A statistics professor made the following histogram for the scores on her class’s first exam.   If…

A: From the Histogram, the scores and the corresponding frequencies are, Given that the passing score…

Q: In 2016 the Better Business Bureau settled 77% of complaints they received in the United States.…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: 13. State your hypotheses (include both Ho and H1).

A: Given that  Data of X= Number of hours slept before exam  Data of Y=Number of correct answers on…

Q: The chart below shows the grade distribution on a quiz in one of my classes. If there are 34…

A: Solution: The objective is to find the number of students who scored A grade

Q: You have torn a tendon and is facing surgery to repair it. The surgeon explains the risks to you:…

A: The objective of the question is to find the percentage of operations that succeed and are free from…

Q: 50 part-time students were asked how many courses they were taking this term. The (incomplete)…

A: From the given information, # of courses Frequency Relative Frequency=frequency/Total frequency…

Q: The accompanying data sets represent the annual rate of return (in percent) of eight randomly…

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Q: What is the weighted mean of the numbers 10%, 30%, 60%, 70, 86 and 94

A: The formula of weighted mean is given by…

Q: Find the z-score that separates the largest 5% of scores from the rest.  Round your result to 3…

A: Obtain the z-score that separates the largest 5% of scores from the rest. The z-score that separates…

Q: a written below, establish the Popularity Index for the following items that have been sold in a…

A: Introduction: Division is one in all the four elementary mathematical operations, beside addition,…

Q: Consider the monthly Gender of all 5 employees of a company: Gender={F,F, M, M, F} Find the number…

A: Given that There are 5 employees of a company. Gender={F,F, M, M, F}

Q: Homer Simpson is interested in studying the ratio of the various colors of sprinkles on Lard Lad…

A: Introduction: Here, it is not mentioned whether the three donuts of each variety are chosen randomly…

Q: Martha Quinn is interested in the proportion of fast to slow songs she will play today.  She takes…

A: In this method of selection, each song have equal probability of getting selected and the selection…

Q: Find the mean: 4,5,7,9

A: The data set is: 4,5,7,9

Q: M= 90 SD= 7.8 What raw score is needed to be in the top 8%?

A: *Mean μ=90SD σ=7.8Top 8%⇒P(X>x)=0.08⇒P(X≤x)=092Corresponding  z-score is obtained as

Q: A group of students start a walking club. Each student recorded their walking time in April 2022 as…

A: We know that,  Mean = ΣXi/n where ΣXi is the sum of all the terms and n is the sample size.  Here…

Q: It is known that, in a small town, 0.22 percent people are allergic to pollen and 0.2 percent people…

A:

Q: "Save today by switching to SOAR!" is the slogan for SOAR, a cell phone service provider. Logan…

A: Farmula used Standard error=σ/√n Given  n=75, x̄=sample mean=$19.03, standard deviations=σ=$4.71

Q: what percentage of bus drivers had 3 or more traffics acccidents

A: From the provided information, Sample size (n) = 700 Total frequency of 3 or more traffic accidents…

Q: Suppose that 35% of people own dogs. If you pick two people at random; what is the percent that they…

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Q: If 80% of Mars rovers land in former streambeds and 65% of the rovers in streambeds on Mars find…

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Q: Where did the 25% come from?

A: Since we know that 25% difference between each quartile

Q: 2.What percentage of data is represented by the shaded area?

A: The objective is to state percentage of data that is represented by the shaded area

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.