120 Answered Questions for the topic Mean

04/15/16

Independant samples T-Test
I gathered data using Likert scale questions 1,2,3,4,5, which I then inputted into SPSS and carried out an independent samples T-Test analysis. The T-Test results I then have to discuss, when it... more
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04/12/16

what is the mean of 81, 68, 50, 75, 64
WHY DO I NEED TO HAVE A DESCRIPTION 
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04/10/16

Statistics
A college student took 4 courses last semester. His final grades, along with the credits each class is worth, are as follow: A (3), B (4), C (2), and D (3). The grading system assigns quality... more
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03/29/16

Statistics question: A random sample of 40 statistics students had an average test grade of 81.5
A random sample of 40 statistics students had an average test grade of 81.5 and a standard deviation of 10.2. Construct the confidence interval for the population mean, μ if c = 0.90.   The... more
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03/27/16

Statistics Question: The repair cost of a Subaru engine is normally distributed with a mean of $5,850 and standard deviation of $1,125.
The repair cost of a Subaru engine is normally distributed with a mean of $5,850 and standard deviation of $1,125. Random samples of 20 Subaru engines are drawn from this population and the mean... more
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03/27/16

Statistics Question: The temperature in Orlando on a given summer day is normally distributed with a mean of 98.6° F
The temperature in Orlando on a given summer day is normally distributed with a mean of 98.6° F and a standard deviation of 0.60° F. If 36 summer days in Orlando are randomly selected, find the... more
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03/27/16

statistics question: The salaries of Pet Detectives are normally distributed with a mean of $32,000
The salaries of Pet Detectives are normally distributed with a mean of $32,000 and a standard deviation of $3000. If 100 Pet Detectives are randomly selected, find the probability that their... more
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03/22/16

can somone please check my work.
The data from placebo 0mg is listed below. 57,27,32,31,34,38,71,33,34,53,36,42,26,52,36,55,36,42,36,54,34,29,33,33     What is the mean number of correct responses of the participants after... more
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03/13/16

Find mean and St .dev., when 35% patients suffer from side effects and 15 are given the drug.
Clinical trials have found 35% of patients are likely to suffer side effects from a drug which treats migraine. In a clinic, it is prescribed to 15 patients a month.  -> find the mean and St .... more
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03/06/16

1st prize-10$, probability of winning this 0.2, 2nd prize-5$, probability of winning 2nd 0.3. Probability distribution of X? Mean amount per week?
I solved this question, however, I'm not sure about the result, so I'd like to see how you solved it. Thank you in advance!   Linda takes part in a spelling competition in which first prize is... more
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02/21/16

Describe a scenario
Describe a scenario where you expect a set of data to have   a.) a large standard deviation    b.) a small standard deviation       The prize for winning a contest can be chosen from... more
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02/21/16

A normally distributed data has been
A normally distributed set of data has been generated where 50% of the data lies below 97 and 70% lies below 104. Determine the mean and standard deviation of this data.
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02/20/16

The edible portion of grape clusters
The edible portion of grape clusters from a Mexican farm were measured to have a mean weight of 429.5 g and a standard deviation of 42.8 g. For selling purposes, the clusters are divided into two... more
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Mean

02/16/16

for the 12 months in year 2002
for the 12 months in year 2002 , a police department of a certain province reported 3,4,2,4,9,7,5,2,7,3 and 5 armed robberies. Find the mean armed robberies in a year
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Mean

01/16/16

find the mean examination marks in mathematics for all the 3 sections taken together
 examination marks in  in 3 sections are 68, 75 and 72 the number of student Being 32 ,43 and 45 respectively in  these sections. find the mean examination marks in mathematics for all the 3... more
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12/31/15

Testing for significant difference? help please!
My topic was: Are there significant multitasking differences between males and females? I had a total of 90 subjects (45 males and 45 females) play an online game. The game consisted of levels, and... more
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12/10/15

Descriptive Statistics (mode, median, mean, range, standard deviation)
1) 64.5  63.5  63.5  65  66  65.5  61  66  64  65 The data above represents the heights, in inches, of a random sample of adult American women. For this data calculate the:(a) Mode(b) Median(c)... more
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11/19/15

Given weights 3.0, 3.0, 3.5 and 2.5, what is the mean? (Multiple choice)
The answer choices are: A) 3.0 plus or minus 0 B) 3.0 plus or minus 0.25 C) 3.0 plus or minus 0.5   Please explain! Thank you so much in advance!
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11/19/15

On average the acorn weighs... (given 4 weights) THANK YOU IN ADVANCE
You are given 4 acorn weights (in grams): 3.0, 3.0, 3.5, and 2.5 On average the acorn weighs... A) 3.0 plus or minus 0g B) 3.0 plus or minus 0.25g C) 3.0 plus or minus 0.50g   Please explain!... more
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10/27/15

Student t Distribution Problem
Question/Problem: Data Set 1 in Appendix B lists the white blood cell counts (1000 cells/µL) of 40 randomly selected women. The mean of those 40 values is 7.15 and the standard deviation is 2.28.... more
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10/06/15

if the average of a and -5 is 10, then what is a?
 what is the arithmetic mean (a) in the problem
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10/03/15

Normal Distribution
Suppose that replacement times for washing machines are normally distributed with a mean of 10 years and a standard deviation of 1.4 years. Find the replacement time that separates the top 18% from... more
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Mean Average

07/31/15

Arithmetic Mean with Variables
What is the arithmetic mean of a set one numbers with 1 variable? (i.e. - 10, 10, 10, 10, 8, 8, 8, 8, 12, 12, 11, y) ?   The question asks for us to find the arithmetic mean (average) of the ages... more
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07/04/15

algebra 1/2 question
  In a math course, a student scored 100 on one test,97 on another test, and 88 on each of the other tests. The students test average, where each is weighted equally is exactly 91. What is the... more
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05/05/15

The mean high temperature for a town in Saskatchewan is -15 degrees and the standard deviation is 6 degrees.
What is the probability that the temperature will get above zero? 
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