An agriculturist claims that she has cultivated a new variety of orange that has a significantly higher content of vitamin C than the variety that is currently the top seller. A random sample of 15 oranges of the new variety and a random sample of 13 oranges of the current top seller were sampled, giving the following results: n1 = 15 s = 6.4460 n2 = 13 s = 9.0336
Q: In a test of H0: μ = 11 against HA: μ < 11, the sample data with sample size 25 from a normal…
A: We have to find np value for given data..
Q: In an effort to better manage his inventory levels, the owner of two steak and seafood restaurants,…
A: The given 99% confidence interval is 5.34 ± 3.3895 halibut fillets.
Q: The following data are from a random sample of 10 students who participated in a study undertaken to…
A: It is given that the data of 10 randomly selected students sleep time and GPA.
Q: A student was asked to find a 98% CH data from a random sample of size 0.11 <p< 0,32?
A: As given, the 98% confidence interval for the proportion of students who take notes is 0.11…
Q: A producer of chocolate bars hypothesizes that his production does not adhere to the weight standard…
A: State the hypotheses. That is, there is no evidence to conclude that the production process is…
Q: curious
A: This is a dependent paired 't-test. sample size (n) = 16 The Null and alternative hypothesis Ho :…
Q: Find the corresponding z-score for a sample of n = 4 and M = 38 taken from a population with a mean…
A: Given,Sample size (n)=4Sample mean (M)=38Population mean(μ) =40Standard deviation (σ)=8
Q: An experiment compares two treatment conditions with a sample ofn = 20 in each treatment. If the…
A:
Q: ased on information from a previous study, r1 = 38 people out of a random sample of n1 = 105 adult…
A: Introduction: Denote p1, p2 as the true population proportions of people who believe in…
Q: The manufacturer of a popular soft drink claims that cans of this drink contain 12 ounces. A…
A: Given that data 11.9 11.9 12.0 11.9 12.0 11.7 11.6 11.5 11.6 12.0…
Q: In a large department store, the owner wishes to see whether the number of shoplifting incidents per…
A: ]hypothesis H0 : Mbefore =MafterH1 : Mbefore ≠ Mafter before after diff abs diff rank 7 5…
Q: In a 4-week study about the effectiveness of Do you Feel Better? using magnetic insoles to treat…
A: n1 = 52, x1 = 15, p1 = 0.288 n2 = 48, x2 = 18, p2 = 0.375
Q: A producer of chocolate bars hypothesizes that his production does not adhere to the weight standard…
A: For ease of calculations we construct the following table: 96.4 97.64 98.48 97.67 100.11 95.29…
Q: In a survey of 1000 drivers from Region A, 848 wear a seat belt. In a survey of 1000 drivers from…
A: Here use 2 sample proportion of z test
Q: Rescarch has shown that obese adult males have lower levels of testosterone. However, it is unknown…
A:
Q: t of 4. A parent advisory board for a certain university was concerned about the effect of part-time…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: In a previous year, 52% of females aged 15 and older lived alone. A sociologist tests whether this…
A: Given that, x=393,n=750,p0=0.52 Because np01-p0=750×0.52×(1-0.52)=187.2>10, the sample size is…
Q: In a 4-week study about the effectiveness of using magnetic insoles to treat plantar heel pain, 50…
A:
Q: 26 15 10 40 10 20 30 36 40 0 5 10 20 32 16 12 40 36 10 0 0.1314…
A: Given data : 0, 0, 5, 10, 10, 10, 10, 12, 15, 16, 20, 20, 26, 30, 32, 36, 36, 40, 40, 40
Q: An article describes several studies of the failure rate of defibrillators used in the treatment of…
A: Sample Size Sample number of events Sample proportion Sample 1 n₁ = 93 x₁ =11 p₁ = x₁/n₁…
Q: In a 4-week study about the effectiveness of using magnetic insoles to treat plantar heel pain, 50…
A: The question is about hypo. testing for difference between two prop. Given : No. of subjects who…
Q: In a 4-week study about the effectiveness of Do you Feel Better? Magnetic Insoles using magnetic…
A: n1 = 51, x1 = 18, p1 = 0.353 n2 = 48, x2 = 16, p2 =0.381
Q: Use a 0.05 significance level to test the claim that the mean resting pulse rate of people who do…
A: Here given, A researcher was interested in comparing the resting pulse rates of people who exercise…
Q: In a survey of 1000 drivers from Region A, 849 wear a seat belt. In a survey of 1000 drivers from…
A:
Q: A firm in Lebanon has developed a chemical solution that can be added to car gasoline which they…
A: Since you have asked multiple question, we will solve the first question for you. If youwant any…
Q: In a survey of 200 females who recently completed high school, 75 % were enrolled in college.…
A: Answer:-
Q: In a study conducted to examine the quality of fish after 7 days in ice storage, tên raw fish of the…
A: The correlation coefficient is a statistical measure of the strength of the relationship between the…
Q: Traffic accidents: Traffic engineers compared rates of traffic accidents at intersections with…
A:
Q: A repeated measures study using a sample of n=32 participants would produce a t statistic with df=…
A: Given problem is : A repeated measures study using a sample of n=32 participants would produce a t…
Q: For the past several years, 55% of students at a particular college who lived on campus one year…
A: The one sample z test is conducted for a proportion of college students who plan to live on campus…
Q: Independent random samples of n1 = 15 blue-color workers and n2 = 13 white collar workers yielded…
A: Given Data : For Sample 1 x̄1 = 115.0 s1 = 10.2 n1 = 15 For Sample 2…
Q: In a clinical trial, 19 out of 879 patients taking a prescription drug dally complained of flulike…
A: One proportion Z test is applicable
Q: The model below was fitted to a random sample of 30 families in order to explain household…
A: Obtain the value of the test statistic. The value of the test statistic is obtained below as…
Q: As a researcher for an environmental agency, you have been asked to determine if the air quality in…
A: Given : x1 = 24.57S1 = 14.56x2 =33S2 = 18.80
Q: The following paired random samples are measurements of the heat-producing capacity (in millions of…
A: Given: Mine 1 Mine 2 8380 7660 8180 7510 8500 7910 7840 8070 7990 7790
Q: In a study of factors thought to be responsible for the adverse effects of smoking on human…
A: Introduction: Denote μ1, μ2 as the true population mean cadmium levels (nanograms per gram) in…
Q: In a 4-week study about the effectiveness of using magnetic insoles to treat plantar heel pain, 51…
A: (a) The null and alternative hypotheses are: Ho: p_1 = p_2Ho:p1=p2 Ha: p_1 \ne p_2Ha:p1̸=p2…
Q: In an investigation of the visual scanning behaviour of deaf children, measurements of eye movement…
A: Given Deaf children Normal children 1.81 0.95 2.2 1.49 3.29 1.12 2.13 1.07 2.55 1…
Q: 6.4.10. In a study of factors thought to be responsible for the adverse effects of smoking on human…
A: Given information: A study to study the factors which are responsible for the adverse effects of…
Q: Find the corresponding z-score for a sample of n = 16 and M = 38 taken from a population with a…
A: X¯ ~ N(μx¯ , σx¯) μ= 40 and σ = 8, n = 16 and M = 38
Q: In a survey of 175 females who recently completed high school, 76% were enrolled in college. In a…
A:
Q: In a 4-week study about the effectiveness of using magnetic insoles to treat plantar heel pain, 51…
A: The question is about hypo. testing Given : Total no. of subjects who wore magnetic insoles ( n1 ) =…
Q: In an effort to better manage his inventory levels, the owner of two steak and seafood restaurants,…
A: Given Information : In an effort to better manage his inventory levels, the owner of two steak and…
Q: An experiment compares two treatment conditions with a sample of n = 20 in each treatment. If the…
A: Solution:- We have given that Sample size n = 20 and two treatment.
Q: A nutrition store in the mall is selling "memory booster" which is a concoction of herbs and…
A:
Q: Under random assignment, is beta 1^ an unbiased estimator of the average treatment effect (ATE)? ATE…
A: Given information: It is asked to find the unbiased estimator of the average treatment effect.
Q: In a 4-week study about the effectiveness of using magnetic insoles to treat plantar heel pain,…
A: Note: Since you have posted a question with multiple subparts, we will solve the first three…
Q: Two separate samples of subjects provide the following set of data. Is there a significant…
A: Solution: Given information: n1=10 Sample size of controln2= 15 Sample size of treated M1= 3.5…
Q: As a researcher for an environmental agency, you have been asked to determine if the air quality in…
A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: In a test of H0: μ = 14 against HA: μ < 14, the sample data with sample size 25 from a normal…
A: We have find normal distribution...
Which hypothesis test would be appropriate to determine whether the new variety of orange
has a significantly higher content of vitamin C than the variety that is currently the top seller?
Do NOT perform a hypothesis test – simply tell me which test should be used, why you
chose this test, and give the formula for the test statistic.
Step by step
Solved in 2 steps with 2 images
- 31% of all pygmy softshell tortoises have stripes on their shells. A herpetologist in Cititon collects a sample of 28 pygmy softshell tortoises and finds that 8 of them have stripes on their shells. Is there enough evidence to conclude, at a significance of alpha = 0.05, that the proportion of pygmy softshell tortoises in Cititon with stripes on their shells is less than 31%? What is the claim? What is the null hypothesis? What is the alternative hypothesis? What is the test statistic? What is/are the critical value(s)? Do we reject the null hypothesis? What conclusion do we draw? What is the P-value for the problem above?For an independent-measures study using ANOVA with dfbetween = 4 and dfwithin = 18, what value of q is used for Tukey’s HSD formula (assume alpha = .05)? a. 4.28 b. 5.38 c. 4.00 d. Cannot be determinedBased on information from a previous study, r1 = 38 people out of a random sample of n1 = 104 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 104 adult Americans who did attend college, r2 = 48 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend college? Use ? = 0.01. (a) What is the level of significance?State the null and alternate hypotheses. H0: p1 = p2; H1: p1 > p2H0: p1 = p2; H1: p1 < p2 H0: p1 = p2; H1: p1 ≠ p2H0: p1 < p2; H1: p1 = p2 (b) What sampling distribution will you use? What assumptions are you making? The Student's t. The number of trials is sufficiently large.The standard normal. The number of trials is sufficiently large. The Student's t. We assume the population distributions are approximately normal.The standard normal. We assume the…
- Based on information from a previous study, r1 = 34 people out of a random sample of n1 = 105 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 105 adult Americans who did attend college, r2 = 50 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend college? Use ? = 0.01. (a) What is the level of significance?State the null and alternate hypotheses. H0: p1 = p2; H1: p1 ≠ p2H0: p1 < p2; H1: p1 = p2 H0: p1 = p2; H1: p1 < p2H0: p1 = p2; H1: p1 > p2 (b) What sampling distribution will you use? What assumptions are you making? The Student's t. The number of trials is sufficiently large.The standard normal. We assume the population distributions are approximately normal. The standard normal. The number of trials is sufficiently large.The Student's t. We assume the…Based on information from a previous study, r1 = 38 people out of a random sample of n1 = 105 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 105 adult Americans who did attend college, r2 = 49 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend college? Use α = 0.01. 1. What is the value of the sample test statistic? (Test the difference p1 − p2. Do not use rounded values. Round your final answer to two decimal places.) 2. Find (or estimate) the P-value. (Round your answer to four decimal places.)Based on information from a previous study, r1 = 38 people out of a random sample of n1 = 106 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 106 adult Americans who did attend college, r2 = 52 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend college? Use α = 0.01. (a) What is the level of significance? What is the value of the sample test statistic? (Test the difference p1 − p2. Do not use rounded values. Round your final answer to two decimal places.)(c) Find (or estimate) the P-value. (Round your answer to four decimal places.)
- Based on information from a previous study, r1 = 30 people out of a random sample of n1 = 107 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 107 adult Americans who did attend college, r2 = 46 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend college? Use ? = 0.01.A sample of men and women who had passed their driver's test either the first time or the second time were surveyed, with the following results: Results of the driving testGender First time Second timeMen 126 211Women 135 178a) Do these data suggest that there is a relationship between gender and the passing of their driver’s test from which the present sample was drawn? Let alpha=.05A consumer group is investigating a producer of diet meals to examine if its prepackaged meals actually contain the advertised 6 ounces of protein in each package. Based on the following data, is there any evidence that the meals do not contain the advertised amount of protein? Run the appropriate test at a 5% level of
- Researchers interested in lead exposure due to car exhaust sampled the blood of 52 police officers subjected to constant inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The blood samples of these officers had an average lead concentration of 124.32 µg/l and an SD of 37.74 µg/l; a previous study of individuals from a nearby suburb, with no history of exposure, found an average blood level concentration of 35 µg/l. Write down the hypotheses that would be appropriate for testing if the police officers appear to have been exposed to a higher concentration of lead. Explicitly state and check all conditions necessary for inference on these data. Test the hypothesis that the downtown police officers have a higher lead exposure than the group in the previous study. Interpret your results in context. Based on your preceding result, without performing a calculation, would a 99% confidence interval for the average blood concentration…Based on information from a previous study, r1 = 37 people out of a random sample of n1 = 97 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of n2 = 97 adult Americans who did attend college, r2 = 46 claim that they believe in extraterrestrials. Does this indicate that the proportion of people who attended college and who believe in extraterrestrials is higher than the proportion who did not attend college? Use α = 0.01. What is the value of the sample test statistic? (Test the difference p1 − p2. Do not use rounded values. Round your final answer to two decimal places.)(c) Find (or estimate) the P-value. (Round your answer to four decimal places.)In a survey of 460 drivers from the South, 397 wear a seat belt. In a survey of 340 drivers from the Northeast, 281 wear a seat belt. At alpha equals 0.06 , can you support the claim that the proportion of drivers who wear seat belts is greater in the South than in the Northeast? Assume the random samples are independent. Complete parts (a) through (e).