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

Question

Explain how we use t as an inferential statistic

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: The student council is hosting a drawing to raise money for scholarships. They are selling tickets f...

A: It is given that the number of tickets is 600 and the numbers of prizes are 1 grand, 4 second, and 1...

Q: Please show TI 84 steps

A: According to the provided information, a fingerprints expert will correctly identify the match 83% o...

Q: I need help with this textbook question. I cant find an example for it in my book. Thank you.

A: The sample mean is obtained below: From the given information, number of observations is 17 and conf...

Q: A student takes a test in his math course and scores 45 points and a test in his psychology coursean...

A: Introduction:Consider X as a normally distributed random variable, with mean μ and standard deviatio...

Q: In 2008, the Detroit Lions set an NFL record by losing all 16 regular-season games. Suppose that the...

A: It is given that n =16.Here, probability of winning an individual game is 0.10.

Q: 27. Call me: A sociologist wants to construct a 95% confidence interval for the proportion of childr...

A: It is given that margin of error (E) is 0.02 and the confidence level is 95%.Here,

Q: Suppose, according to a 1990 demographic report, the average U. S. household spends $90 per day. Sup...

A: Sample mean = $84.5.Sample standard deviation, s is $14.5.The sample size, n is 30.

Q: Reducing the frequency from the tails of a distribution will: increase the standard deviation. red...

A: Reducing the frequency from the tails of the distribution will lead to fall in the sample size or it...

Q: Suppose the discrete random variable of interest, x, is the number of rolls that result in a composi...

A: 8) From the given information, a dice is rolled three times. The given events are:C:{composite numbe...

Q: Personnel tests are designed to test a job applicant's cognitive and/or physical abilities. A part...

A: It is given that the mean and standard deviation are 74 and 7.4, respectively.

Q: Assume the random variable X has a binomial distribution with the given probability of obtaining a s...

A: Given Datan = 9p = 0.5Required probability is given by

Q: I have to draw a P-Value graph using variables I calculated in a Chi-square test using Phstat in Mic...

A: Given Chi square test,Critical value = 12.59test statistic = 5.61p value = 0.47In chi square test th...

Q: I'm having trouble with question 7 in my textbook because I cant find an example for it. Help would ...

A: Solution:Confidence interval:The (1-α) % confidence interval for population standard deviation is gi...

Q: Comparison between two diets in obese children, one low-fat and one low-carb 8 week intervention wit...

A: A).The standard deviations of low-fat and low-carb groups are 8.4 and 7.7 respectively. The sample s...

Q: what are the appropriate numbers of participants needed for each of the folowing planned studies to ...

A: (a)The conditions for the effect size for the t test means are:If d ≤ 0.2, then the effect size is s...

Q: 3. A medical researcher examined the number of asthma attacks patients had both before and while usi...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: In a test of the effectiveness of garlic for lowering cholesterol, 48 subjects were treated with ga...

A: Given sample mean = 3.2Sample standard deviation = 16.8The 95% confidence interval has 0.975 area to...

Q: Part D and E

A: In order to get the test statistic value, the MINITAB output for the paired t-test is given below.

Q: Assume the random variable X is normally distributed with mean μ=50 and standard deviation σ=7. Find...

A: Solution:From the given information, mean value is 50, standard deviation value is 7. Let the random...

Q: Suppose that you are buying a car for $50,000, including taxes and license fees. You saved $10,000 f...

A: 13. a) The monthly payment for incentive A is $698 and it is obtained below: From the given informat...

Q: How do I find the equation of the line containing the points (-1, -1) and (1,3).

A: Equation of a line from given two points can be found:Consider,

Q: A manufacturer of automatic car transmissions uses steel gears. An important characteristic of these...

A: 1. The number of different treatment combinations is 6 and it is calculated below: From the given in...

Q: Question 1

A: Let mu1 be the sample mean of acute schizophrenics and mu2 be the mean of chronic schizophrenics.Hyp...

Q: The mean score on a driving exam for a group of driver's education students is 60 points, with a s...

A: Solution:From the given information, k value is 22, standard deviation of points is 4 and mean numbe...

Q: Assume the random variable x is normally distributed with mean equals=84 and standard deviation equa...

A: z-score:A z-score is a standard score that describes the number of standard deviation away from its ...

Q: Please show TI 84 steps

A: The provided random sample are given as:

Q: How to find margin of error and 95% confidence interval?

A: Margin of error:The margin of error helps in constructing confidence intervals, which gives a range ...

Q: If a researcher reported for a single-sample t-test that t(17) = 2.90, p<.02, how many subjects w...

A: It is given that the test is single-sample t test and the degrees of freedom is 17.

Q: Winning the jackpot in a particular lottery requires that you select the correct four numbers betwee...

A: Solution: We are given that winning the jackpot in a particular lottery requires that you select the...

Q: A coin is tossed and a six-sided die numbered 1 through 6 is rolled. Find the probability of tossing...

A: It is given that a coin is tossed and six -sided die numbered 1 through 6 is rolled. We have to fin...

Q: According to scientists, the cockroach has had 300 million years to develop a resistance to destruct...

A: Obtain the critical value at 95% confidence level:It is given that,Sample mean = 10,693/5,000=2.1386...

Q: Scrapper Elevator Company has 20 sales representatives who sell its product throughout the United St...

A: Solution:a.The distribution of sample means is identified below: Central limit theorem:If the sample...

Q: I don't understand the the given answer when looking at this chart. When I use the calculator I get ...

A: Let the lower and upper limits are –z and z. It is known that in a standard normal distribution, P(Z...

Q: The probability of a randomly selected adult in one country being infected with a certain virus is 0...

A: It is provided that the probability, in one country a randomly selected adult being infected with a ...

Q: A researcher wants to investigate the relationship between number of hours spent outdoors and the he...

A: Solution:Step 1:After copying the given data in to EXCEL software,Go to Data > Data analysis >...

Q: Please show TI 84 steps

A: Consider X to be the random variable, defined as the lead level in water specimens with sample mean ...

Q: Brandon Lang is a creative entrepreneur who has developed a novelty soap item called Jackpot to targ...

A: Hello there! there are more than three subparts in the question. According to our policies we cannot...

Q: What does it mean for a regression line to be the "best-fit" line.

A: The form of the simple linear regression line is given by,

Q: Can you help me with j and k?

A: Solution:The mean is obtained below:The mean is,

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may var...

A: It is given that 39 are extroverts out of 65 professional actors.

Q: Suppose that the number of years that a used car will run before a major breakdown is exponentially ...

A: Exponential distribution describes wait time between any two Poisson occurrences. If T is the time t...

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognit...

A: It is given that margin of error (E) is 0.05 and the confidence level is 90%.

Q: the distribution of certain test scores is a nonstandard normal distribution with a mean of 80 and ...

A: Given:Population mean (μ) = 80Population standard deviation (σ) = 3

Q: Possion Distribution A company produces optical-fiber cable with a mean of 0.5 flaws per 100 feet. W...

A: Here the random variable X, Number of flaws per 900 feet follows Poisson distribution with mean 0.5 ...

Q: Tanya takes her Physics test and is told that her Z-score is 3.10. If the class mean was 75 and the ...

A: Standard normal distribution:The standard normal distribution is a special case of normal distributi...

Q: 4. A researcher wanted to examine the effect of a new math study skills program on second graders. F...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: Imagine that you look up a critical t value in a t- table and your observed t value for a specific ...

A: Introduction:Suppose a t test is being performed with ν degrees of freedom, at level of significance...

Q: The physical plant at the main campus of a large state university recieves daily requests to replace...

A: Solution: We are given that the distribution of the number of daily requests is bell-shaped and has ...

Q: How can the specific characteristics of a population affect the analysis of data?

A: The basic data which is collected for any population before the analysis of data is their demographi...

Q: 7.4.46 Question Help When asked whether marriage is becoming obsolete, 758 out of 1968 randomly sele...

A: It is given that 758 out of 1,968 randomly selected adults who responded to a poll said yes. The sam...