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Hypothesis Testing
Page 4
Questions (2,043)
please help me with this challenge question, as i don't quite understand it.:
Yolanda makes this hypothesis: "If salt is added to
7 answers
asked by
Beth
501 views
If you test the (one sample) null hypothesis that the population proportion p ‘à 0.3 and you get the test statistic value of z
4 answers
asked by
Anonymous
943 views
On a television talk show, a guest claims that people who exercise vigorously for 15 minutes or more every day are able to solve
5 answers
asked by
ms.sue help
3,228 views
a certain brand of powdered milk is advertised as having a net weight of 250 grams. if the net weights of a random sample of 10
6 answers
asked by
carla
5,335 views
2. The following is a random sample of grades achieved on statistics examination by 10 male students in a very large class and a
4 answers
asked by
Paulo
1,334 views
A perfume company claims that the best selling perfume contains at most 25%
alcohol. Twenty (20) bottles were selected and found
5 answers
asked by
mike
2,252 views
Why is it important to scientists for a hypothesis to be testable? How would the experiment differ if it were not? What is an
7 answers
asked by
John
2,061 views
In performing a hypothesis test, the null hypothesis is population mean = 6.9 and the alternative hypothesis is population mean
4 answers
asked by
Anonymous
2,920 views
a)π1,β¦,ππβΌπ.π.π.π―ππππ(π) for some unknown π>0 ;
π»0:π=π0 v.s.
4 answers
asked by
ramj
1,440 views
If my p-value = .322 and my significant level is .05 , then
My Null Hypothesis is rejected and I must accept the Alternative
5 answers
asked by
John
6,798 views
A packaging device is set to fill detergent power packets with a mean weight of 5 Kg. The standard deviation is known to be 0.01
5 answers
asked by
Shams
2,119 views
Im am so lost....
A bank conducts a survey in which it randomly samples 400 of it customers. The survey asks the customers which
4 answers
asked by
Kelly
1,943 views
A machine is designed to fill jars with 16 ounces of coffee. A consumer suspects that the machine is not filling the jars
5 answers
asked by
ryan
2,400 views
In studying the responses to a multiple-choice test question,the following sample data were obtained. At the .05 significance
4 answers
asked by
Dhelp
2,025 views
The MacBurger restaurant chain claims that the waiting time of customers for service is
normally distributed, with a mean of 3
4 answers
asked by
Renee
3,584 views
A researcher claims that at least 10% of all football helmets have manufacturing flaws that could potentially cause injury to
3 answers
asked by
Josh
1,558 views
In a chi-squared test of a contingency table, the value of the test statistic was =12.678, and the critical value at = 0.025 was
4 answers
asked by
Danny
1,649 views
suppose the alternative hypothesis in a hypothesis test is "the population mean is less than 60" if the sample size is 50 and
4 answers
asked by
jack
2,067 views
The National Assessment of Educational Progress tested a simple random sample of 1000 thirteen year old students in both 2004
4 answers
asked by
ramj
1,750 views
If it is claimed that the contents of soaps boxes sold weigh on average at least 20 ounces.
The distribution of weight is known
4 answers
asked by
Anonymous
2,129 views
2. At a local university, a sample of 49 evening students was selected in order to determine whether
the average age of the
4 answers
asked by
raj
3,101 views
According to a study several years ago by the Personal Communications Industry Association, the average wireless phone user
5 answers
asked by
Feifer
1,927 views
focus groups of 11 ppl are randomly selected to discuss products of the yummy company .it is determined that the mean number
4 answers
asked by
AILY
3,357 views
True or False
In most research situations, the goal of a hypothesis test is to reject the null hypothesis.
4 answers
asked by
lyn
3,806 views
In order to compare two kinds of feed, thirteen pigs are split into two groups, and each group received one feed. The following
4 answers
asked by
Bill
1,741 views
Orange juice is bottled on two different production lines. A sample of 5 bottles from the first line yields a mean of 1.2 quarts
4 answers
asked by
Matra
566 views
A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term average daily sales
4 answers
asked by
Matt
3,414 views
2. A statistics professor is used to having a variance in his class grades of no more than 100. He feels that his current group
4 answers
asked by
Marilyn
661 views
Formulate and test a hypothesis to determine if statistical evidence suggests that the graduation rate for either top liberal
3 answers
asked by
Anonymous
1,053 views
On average, what value is expected for the F-ratio if the null hypothesis is true?
4 answers
asked by
Maria Solache
2,691 views
2. In 2009 a random sample of 70 unemployed people in Alabama showed an average weekly benefit of $199.65. In Mississippi, for a
4 answers
asked by
Gummy
3,500 views
I really need help with this problem. I am not sure what the question is asking and how to approach it! Thanks in advance!
Its
7 answers
asked by
Hanna
3,867 views
The one way anova is constructed around the concept of determining goodness of fit between explanatory and outcome variable.
4 answers
asked by
Rondezy
190 views
A consumer-research organization routinely selects several car models each year and evaluates their
fuel efficiency. In this
3 answers
asked by
sk
582 views
In the population of typical college students, _ 5 75 on a statistics final exam _X 5 6.42 . For 25 students who studied
4 answers
asked by
Anonymous
650 views
A telephone company's records indicate that private customers pay on average $17.10 per month for long-distance telephone calls.
4 answers
asked by
John
1,283 views
A maker of microwave ovens advertises that no more than 10% of its microwaves need repair during the first 5 years of use. In a
4 answers
asked by
George
2,572 views
This is a question I have to answer for a University of Phoenix class, If any one could help and explain to me (in a stistics
4 answers
asked by
Lost In the Statistics Sauce
1,971 views
A shoe maker company produces a specific model of shoes having 15 months average lifetime. One of the employees in their R & D
2 answers
asked by
Kaur
1,092 views
Hinton Press hypothesizes that the average life of its largest web press is 14,500 hours. They know
that the standard deviation
4 answers
asked by
sudhanshu kumar
1,002 views
A manufacturer makes ball bearings that are supposed to have a mean weight of 30g. A retailer suspects that the mean weight is
4 answers
asked by
Leslie667
1,834 views
To plan the budget for next year a college needs to estimate what impact current economic downturn might have on student
4 answers
asked by
Katie
2,671 views
Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give
3 answers
asked by
Kathy
1,206 views
for randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. the scores of 14 randomly
4 answers
asked by
carl
4,390 views
Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that x has a normal distribution
4 answers
asked by
Clay
3,072 views
A sample of 40 observations is selected from one approximately normal population. The sample mean is 102 and the sample standard
4 answers
asked by
georgia
1,112 views
1- When the necessary conditions are met, a two-tail test is being conducted to test the difference between two population
4 answers
asked by
Lesliam
1,934 views
1) For each of the following statements, formulate appropriate null and alternative hypotheses. Indicate whether the appropriate
5 answers
asked by
Stuart
1,249 views
Given the following null hypothesis, give an example of a Type I error.
H0: There is no difference between the number of males or
4 answers
asked by
Anonymous
1,113 views
create a null hypothesis on these research questions:
a. what are the differences between emergency room shifts on medication
3 answers
asked by
Jeff
1,654 views
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