Start your trial now! First week only $4.99!*arrow_forward*

Question

Why do we express our hypothesis in a conservative form (i.e., no difference)?

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: From the sample space S= {1,2,3,4,..,15}, a single number is to be selected at random. Given the fol...

A: Probability: The chance that something will happen. It is also defined as the ratio of favorable out...

Q: According to a reputable magazine, 35% of people in a certain large country have sleepwalked at leas...

A: Click to see the answer

Q: describe the difference between a one-sample t-test, a two-sample (independent-samples) t-test, a re...

A: One sample t: One sample t test is used for comparing the population mean to particular constant val...

Q: Marivic is interested in the effect of playing puzzle games on academic achievement. She devised a s...

A: The correlation coefficient is 0.40.

Q: coniderice evel given below complete pats (a) drougi (0). drug is used to help prevent blood clots i...

A: Solution::" Given information: n= 4816 Sample size of patients x= 176 patients developed adverse re...

Q: The weights of ice cream cartons are normally distributed with a mean weight of 13 ounces and a stan...

A: From the provided information, Mean (µ) = 13 Standard deviation (σ) = 0.5 Let X be a random variable...

Q: What is the answer for following data? 1) find the correlation coefficient? 2) identify the type of ...

A: Correlation: Correlation is the measure of association between two variables in which one variable i...

Q: The owner of a computer repair shop has determined that their daily revenue has mean $7200 and stand...

A: Mean = 7200 Standard deviation = 1200 Sample size = 30

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard...

A: Solution: Let X be the random variable. From the given information, X follows normal distribution wi...

Q: 7. Apply Chebyshev's Theorem to find the least possible fraction of the numbers in a data set lying ...

A: Chebyshev's inequality: Chebyshev's rule is appropriate for any distribution. That is, Chebyshev's ...

Q: First square options are "less than, less than or equal to, greater than, greater than or equal to, ...

A: Consider that μ defines the population mean monthly mileage.

Q: The price per share of stock for a sample of 25 companies was recorded at the beginning of the firs...

A: Beginning End D (d-dbar)^2 53.82 54.19 0.006875 0.002943 77.02 55.7 -0.27681 0.052640 109 102....

Q: The population mean and standard deviation are given below. Find the required probability and determ...

A: Solution: The following values are given to us: Population mean: μ=212 Population standard deviation...

Q: Consider the following data coming from a study of three different groups. For this question, assume...

A: Given information Group 1 Group 2 Group 3 1 5 6 3 3 4 3 4 6 1 ...

Q: You are the operations manager for an airline and you are considering a higher fare level for passen...

A: Solution: a. From the given information, confidence level is 0.95 and E=0.055.

Q: For a lower tail test, the p-value is the probability of obtaining a value for the test statis small...

A: In this case, we need to identify the correct answer.

Q: CNNBC recently reported that the mean annual cost of auto insurance is 979 dollars. Assume the stand...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a...

Q: You are the operations manager for an airline and you are considering a higher fare level four passe...

A: It is given that margin of error (E) is 0.04 and the confidence level is 99%.

Q: Because of high production-changeover time and costs, a director of manufacturing must convince mana...

A: Given information- We have given that because of high production-changeover time and costs, a direct...

Q: A used car dealer says that the mean price of a three-year-old sports utility vehicle is $21,000. Yo...

A: Solution: a. The claim is that the mean price of a three-year-old sports utility vehicle is $21,000.

Q: Given the sample mean = 23.625, sample standard deviation = 4.8921, and N = 40 for the low income gr...

A: From the provided information, Sample size (n) = 40 Sample mean (x̅) = 23.625 Sample standard deviat...

Q: Number 20

A: The data is given as: Weight Price 0.3 510 0.4 1151 0.5 1343 0.5 1410 1 5669 0.7 2...

Q: You may need to use the appropriate appendix table or technology to answer this question. For a lowe...

A: Here, z = 0 It is a lower tailed test.

Q:

A: The correlation coefficient is the measure to tell how strong is the relationship between two variab...

Q: An article presents a new method for timing traffic signals in heavily traveled intersections. The e...

A: Given information- Sample size, n = 50 Sample mean, x-bar = 653.2 vehicles per hour Sample standard ...

Q: The average price of a college math textbook is $173 and the standard deviation is $30. Suppose that...

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we ar...

Q: please help with: d, e ,f, g, h

A: (a) Determine the type of study. The type of study used t-test for a population mean. (b) St...

Q: Test the claim that the proportion of people who own cats is smaller than 70% at the 0.05 significan...

A: Given: Sample size of people (n) = 100 Sample proportion p^=0.69 Hypothesized proportion (p) = 0.70 ...

Q: Consider the following regression equation: log Yni = log 3.07 + 0.9 log X1i + 1.41 log X2ia. Predic...

A: Given, The regression equation is, log Yni = log 3.07+0.9 log X1i+1.41 log X2i

Q: Statistics Question

A: Class Interval Frequency Midpoint Relative Frequency Cumulative frequency 0-9 8 (0+9)/2=4.5 8/20=...

Q: Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O...

A: n= 181xbar = 29.5s = 6.1

Q: A medical center, with 75,000 charts on file, has established that a chart should be located within ...

A: Total number of chart requests in a month = 675 Number of charts located within the quality standard...

Q: A study investigated survival rates for in-hospital patients who suffered cardiac arrest. Among 58,5...

A: n1=58593 , x1=11604n2=28155 , x2=4139α=0.01

Q: If np 25 and ng 25, estimate P(at least 9) with n= 13 and p= 0.5 by using the normal distribution as...

A: The sample size is 13, and population proportion is 0.5. Checking conditions: np=13×0.5=6.5>5 nq=...

Q: It takes an average of 8.2 minutes for blood to begin clotting after an injury. An EMT wants to see ...

A: Given Information : It takes an average of 8.2 minutes for blood to begin clotting after an injury....

Q: The average wait time to get seated at a popular restaurant in the city on a Friday night is 12 minu...

A: Hey There.! Since you have posted multiple questions as per the guidlines we can answer the first th...

Q: Consider the following hypothesis test. H0: μ ≤ 12 Ha: μ > 12 A sample of 25 provided a sample ...

A: State the given hypothesis. State the given values.

Q: Assume that females have pulse rates that are normally distributed with a mean of u = 74.0 beats per...

A: From the provided information, Mean (µ) = 74.0 Standard deviation (σ) = 12.5 X~N (74.0, 12.5)

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was 2...

A: Given, A standardized exam's scores are normally distributed. In a recent year, the mean test scor...

Q: The amount of pollutants that are found in waterways near large cities is normally distributed with ...

A: Given that : The amount of pollutants that are found in waterways near large cities is normally dis...

Q: Consider the following data coming from a study of three different groups. For this question, assume...

A: Excel Procedure: Enter the data for Group 1, Group 2 and Group 3 in Excel sheet. Go to Data Click...

Q: Use a t-test to test the claim about the population mean u at the given level of significance a usin...

A: μ=52,300x¯=52,498s=2200n=18α=0.05

Q: Help me fast so that I will give good rating.

A: Hi! Thank you for the question As per the honor code, We’ll answer the first question since the exac...

Q: Show work please thank you :) The mean rate for cable with internet from a sample of households was ...

A: Click to see the answer

Q: What is the answer??

A: a).Given, α=0.05n=25x=560s=45 Here, standard error is obtained as- Standard error=sn=4525=9 As per z...

Q: The owner of a computer repair shop has determined that their daily revenue has mean $7200 and stand...

A: Let x¯ is defined as the mean daily revenue. The mean is $7200, standard deviation is $1200. The dai...

Q: 4. 15 healthy adult subjects were asked to walk on a treadmill while connected to monitors. One of t...

A: a) State the hypotheses. There is no evidence to conclude that mean effect of the first disturban...

Q: If a hypothesis test leads to the rejection of the null hypothesis, a have been committed. Type I er...

A: Given that the hypothesis test leads to the rejection of the null hypothesis.

Q: CNNBC recently reported that the mean annual cost of auto insurance is 1016 dollars. Assume the stan...

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for yo...

Q: please answer the highlited portion. Thanks

A: Confidence Interval : A random sample from a population is taken to study the characteristics of pop...