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Statistical Analysis
Page 7
Questions (482)
A professor is interested in determining whether assigning mandatory homework affects
students’ grades. He is currently
1 answer
asked by
matt
709 views
Use the following table to answer questions 7 and 8:
This table displays results from a prospective cohort study evaluating meat
3 answers
asked by
Rupal
690 views
A doctor want to estimate the HDL cholesterol of all 20- to 29- year old females. how many subjects are needed to estimate the
2 answers
asked by
Sonya
678 views
What is the formula to do this exercise, Please.
A sample of 40 investment customers serviced by an account manager are found to
2 answers
asked by
Maggy
660 views
Data were collected on the differences in weight gains of 12 people one
month after they stopped smoking, compared with their
1 answer
asked by
mary
651 views
The table list the sugar content of two types of apples from three different orchards. At a=0.05, test the claim that the sugar
1 answer
asked by
Lea
668 views
The trends in international mathematic and science study (TIMSS) in 2007 examined eighth grade proficiency in math and science.
2 answers
asked by
Marc
651 views
A researcher interested in relationships developed a questionnaire that measures the degree of affection adult men feel for
4 answers
asked by
qwen
651 views
A consumer agency wanted to investigate if four insurance companies differed with regard to the premiums they charge for auto
2 answers
asked by
Jennifer
646 views
We believe that 77% of the population of all Business Statistics I students consider statistics to be an exciting subject.
1 answer
asked by
Promise
634 views
8. A sample of 65 observations is selected from one population. The sample mean is 2.67 and the sample standard deviation is
1 answer
asked by
Barbara
627 views
A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution
1 answer
asked by
adriana
619 views
A researcher performs a hypothesis test to test the claim that among girls aged 9-10, the mean score on a particular aptitude
2 answers
asked by
Katie
611 views
We are managing a large soy bean farm. To estimate our revenues for the coming year,
we need to estimate our crop yield. Soy bean
2 answers
asked by
Sara
606 views
Assume all samples are simple random samples and α (alpha) is taken to be 0.05.
In a certain city, there are about 250,000
1 answer
asked anonymously
58 views
4 Find:
a. The z score for each male salary, based on only the male salaries. b. The z score for each female salary, based on
2 answers
asked by
Anonymous
600 views
can you list the range of the linear regression in question 5
1 answer
asked anonymously
23 views
A recent gasoline survey shows that the national average price of gasoline was $3.498 a gallon. It was felt that gasoline in
1 answer
asked anonymously
51 views
Five number summary: 4.33, 5.05, 5.44. 5.79, 6.81
mean pH: 5.43 standard deviation: 0.54 Given the proportion of observations are
2 answers
asked by
anon
599 views
: A researcher theorized that people can hear better when they have just eaten a large meal. Six individuals were randomly
2 answers
asked by
Anonymous
601 views
The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home
2 answers
asked by
Sue 8
592 views
Use the 5-step hypothesis testing framework to answer the following 2 questions:
Step One: Stating the hypothesis Step Two:
2 answers
asked by
Shayna
613 views
From a survey of 100 college students, a marketing research company found that 65 students owned iPods, 35 owned cars, and 25
2 answers
asked by
samuel
592 views
According to the Journal of the American Medical Association, the doctors found that in the week before and the week after
2 answers
asked by
Jerome
575 views
Twenty (20) students randomly assigned to an experimental group are studying for a test while listening to classical music.
2 answers
asked by
Cyn
596 views
The doctor want to know the effect of reducing blood pressure for a new medicine, chose 28 hypertensive patients to divide two
2 answers
asked by
alfateh
573 views
Chi-square tests are nonparametric tests that examine nominal categories as opposed to numerical values. Consider a situation in
2 answers
asked by
Slomo
575 views
A teacher examined 6 different tests from each of her math classes. Each class had the same number of tests.
Is this sample of
3 answers
asked by
blaze
605 views
In a simple random sample of 250 father-son pairs taken from a large population of such pairs, the mean height of the fathers is
5 answers
asked by
HELP!!!! DEV
570 views
Prospective Cohort Study
The following tables show the crude and sex-specific results from a Prospective Cohort Study that
6 answers
asked by
netspirit
588 views
Visitor Numbers
Total visitors: 2004. 2005. 2006 3,135,727. 3,164,906. 3,281,435 Total visitor days: 2004. 2005. 2006 7,453,465.
2 answers
asked by
Matt
559 views
the average yearly utility costs on Middleton is $1722 with stdev of 146. assume that the utility costs follow a normal
2 answers
asked by
niki
573 views
why using the t statistic may be an appropriate alternative to using a z-score
2 answers
asked by
Ninoska
554 views
A psychologist studied self esteem scores and found the sample data set to be normally distributed with a mean of 50 and a
2 answers
asked by
Stephanie
548 views
A researcher was interested in assessing the effectiveness of the Statistics Diet as
compared to a regular low calorie diet on
2 answers
asked by
Matt
562 views
A study of 40 psychology teachers showed that they spent, on average, 12.6 minutes correcting a student's final term paper. Find
2 answers
asked by
Anonymous
564 views
How do insurance companies use descriptive statistics and probability distributions to project health and auto insurance
2 answers
asked by
Kathy
543 views
n two separate studies, the actual difference between the means of a treated group and an untreated group is 3 points. However,
2 answers
asked by
Mikos
558 views
c) There is a correlation between students’ levels of anxiety and the number of days they are absent from school (r = 0.53, p
2 answers
asked by
Stacy
539 views
A 4 to 7 month old baby sleeps an average of 14 hours per day. At this age, babies sleep patterns follow normal distribution
2 answers
asked by
adriana
543 views
a potato chip manufacturer has been accused of shortchanging their customers with 10 ouce of bags potato chips. a sample of 50
2 answers
asked by
kiki
554 views
How do you relate the significant figures used on a measured value to the standard deviation of
several measurements taken? For
2 answers
asked by
stacy
521 views
A research article included the following table:
Mean Score on Four Questionnarie Scales Before and After the Experimental
2 answers
asked by
stat
539 views
In a study of the effect of a medical treatment, a simple random sample of 300 of the 500 participating patients was assigned to
26 answers
asked by
HELP!!!! DEV
572 views
Can A one-way data table can have any number of outputs?
1 answer
asked by
Mark
14 views
Ted and Suzanne load 3476 songs into a player that randomly selects which song to play.
When in random-selection mode, 22 of the
2 answers
asked by
Nilan Please help
528 views
Here is the height, in inches, of 10 randomly selected members of the girls' dance team and 10 randomly selected of the girls'
2 answers
asked by
Liz
531 views
A researcher has observed independent samples of females and males, recording how long each person took to complete his or her
2 answers
asked by
Laritza
512 views
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as
2 answers
asked by
Kristi
538 views
The average daily high temperature for the month of September in Los Angeles is 27 degrees Celsius (81 degrees Fahrenheit) with
2 answers
asked by
Kleena
507 views
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