1. a nutritionist believes that her new organic diet program will increase the height of 5...
1. a nutritionist believes that her new organic diet program will increase the height of 5 year old girls. what is the best alternative hypothesis?
a) the diet will increase heights b) the diet will not affect heights c) the diet will decrease heights
2. true or false. one tailed test are used when we can hypothesize the direction of a relationship?
3. the critical values for two tailed z test with alpha (0.05) are +- 1.96. If the obtained sample has a score of z=-2.00, then what is the correct statistical decision?
retain the null or reject the null
Homework Answers
Add Answer to:
1. a nutritionist believes that her new organic diet program
will increase the height of 5...
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment...
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment effect with ( a = .05). if the sample data produce a Z-score of ( z= -2.24), what is the correct decision? A. Reject the null hypothesis and conclude that the treatment has no effect B. Reject the null hypothesis and conclude that the treatment has an effect C. Fail to reject the null Hypothesis and conclude that the treatment has no effect D....
Dr. Rulet is an expert in addictive behaviors. One day it occurred to her that perhaps mathematic efficiency is related to gambling addiction. Therefore, she instructed her lab to test a handful of kn...
Dr. Rulet is an expert in addictive behaviors. One day it occurred to her that perhaps mathematic efficiency is related to gambling addiction. Therefore, she instructed her lab to test a handful of known gambling-addicted individuals on both the SAT mathematics section and the Gambling-related Addiction Behavior (GAB) scale. When Dr. Rulet thought about this possible relationship between mathematic efficiency and gambling addiction, she reasoned that those who are good at mathematics might be more inclined to use their ability...
#9 A 0.05 significance level is used for a hypothesis test of the claim that when...
#9 A 0.05 significance level is used for a hypothesis test of the claim that when parents use a particular method of gender? selection, the proportion of baby girls is less than 0.5. Assume that sample data consists of 45 girls in 100 ?births, so the sample statistic of 9/20results in a z score that is 1 standard deviation below 0. Complete parts? (a) through? (f) below. A) state null and alternative hypothesis B) value of a (alpha) C) What...
QUESTIONS 3, 9, 12, 13 and 14 10:384 . osu.instructure.com Scores on the anxiety scale are...
QUESTIONS 3, 9, 12, 13 and 14
10:384 . osu.instructure.com Scores on the anxiety scale are causally related to feelings of comfort in a social gathering Scores on the anxiety scale are significantly related to feelings of comfort in a social gathering Question 3 0.5 pts After analyzing a large database, researchers found a statistically significant relationship between consumption of breakfast cereal per day and daily spending on pet care. If this relationship is only due to random chance it...
Complete: Chapter 8 Problem Set Mean = 0.0 Standard Deviation = 1.0 .5000 .2500 .2500 -4...
Complete: Chapter 8 Problem Set Mean = 0.0 Standard Deviation = 1.0 .5000 .2500 .2500 -4 - بنا 0 1 2 3 N -0.67 0.67 z The critical region is The Z-score boundaries for an alpha level a = .01 are: z = 2.58 and 2 = -2.58 z = 3.29 and 2 = -3.29 z = 1.96 and z = -1.96 Suppose that the calculated z statistic for a particular hypothesis test is 3.24 and the alpha is .01....
Your statistics professor is involved in an educational outreach program designed to increase wom...
Your statistics professor is involved in an educational outreach program designed to increase women’s participation in science, technology, engineering, and mathematics (STEM). The two-week educational program involved fieldtrips and activities designed to increase participants’ knowledge toward STEM. On the first day of the education program, a pre-test is administered to all students. On the final day of the educational program, an identical post-test is administered. After the educational program ends, your professor asks you to help her analyze the results....
1. Regarding a two-tailed z-test with an alpha of 0.05, we would need a Zobt with...
1. Regarding a two-tailed z-test with an alpha of 0.05, we would need a Zobt with an absolute value less than 1.96 in order to reject the null hypothesis. True or False? 2. What happens to the probability of committing a Type I error if the level of significance is changed from α = 0.05 to α = 0.01? A. It increases B. It decreases C. It stays the same D. Cannot determine 3. Given a Zobt of -1.99 ,...
Research data indicates that adolescents, especially girls, experience an increase in self-esteem when given a team-sports...
Research data indicates that adolescents, especially girls, experience an increase in self-esteem when given a team-sports leadership program. To evaluate this result, a researcher obtains (randomly) a sample of n = 9 adolescent girls, all 13 years old. After they participate in the program a self-esteem test is given to each participant and the average score for the sample is M = 84. It is know that the distribution of self-esteem scores for the population of girls is normal with µ = 75....
The long-term average score on the first organic chemistry exam of the year is 42 out...
The long-term average score on the first organic chemistry exam of the year is 42 out of 60 points. The professor wonders whether 12 students he has selected to participate in a pre-exam meditation session score better than the long-term average. The mean score of this group on the first exam is 49 points. He uses a t-test to understand whether this sample provides evidence that the meditation aids exam performance. His test produces a value of t of 2.12....
The decision-making process A graduate student believes that people consider faces with more contrast between lip...
The decision-making process A graduate student believes that people consider faces with more contrast between lip color and skin tone as more feminine. He identifies the null and alternative hypotheses as: H₀: The level of contrast between lip color and skin tone does not affect how feminine a face is considered. H₁: The level of contrast between lip color and skin tone affects how feminine a face is considered. He chooses a significance level of 0.05. After he collects the...
QUESTIONS 3, 9, 12, 13 and 14
10:384 . osu.instructure.com Scores on the anxiety scale are causally related to feelings of comfort in a social gathering Scores on the anxiety scale are significantly related to feelings of comfort in a social gathering Question 3 0.5 pts After analyzing a large database, researchers found a statistically significant relationship between consumption of breakfast cereal per day and daily spending on pet care. If this relationship is only due to random chance it...
Complete: Chapter 8 Problem Set Mean = 0.0 Standard Deviation = 1.0 .5000 .2500 .2500 -4 - بنا 0 1 2 3 N -0.67 0.67 z The critical region is The Z-score boundaries for an alpha level a = .01 are: z = 2.58 and 2 = -2.58 z = 3.29 and 2 = -3.29 z = 1.96 and z = -1.96 Suppose that the calculated z statistic for a particular hypothesis test is 3.24 and the alpha is .01....
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago