Use the sample data and significance level to test the claim that the population standard deviation is greater than 4 Sample data. x = 20, 8 = 4.5, n= 15. State the null hypothesis and the alternative hypothesis. Find the critical value, test statistic , and state your conclusion about the claim. x = 0-05 %3D %3D

Q: A recent national survey found that high school students watched an average (mean) of 7.2 movies per…

A: Solution: 1. State the hypotheses. Null hypothesis: That is, the college students watch not fewer…

Q: A company collects data on the lengths of telephone calls made by employees in two different…

A: For the sales division, the sample mean is 10.26 and the sample standard deviation is 8.56. For the…

Q: Use a one sample z-test to determine whether or not a sample mean of 34 differs from the population…

A: Given that Sample size n = 15 Sample mean = 34 Population SD = 5 Level of significance = 0.05

Q: A sporting goods store believes the average age of its customers is 37 or less. A random sample of…

A: Given that  Hypothesized Population Mean (\mu)(μ) = 3737 Population Standard Deviation…

Q: A recent national survey found that high school students watched an average (mean) of 7.8 movies per…

A: Given that sample size =30 α=0.05 sample mean = 7.3 Population standard deviation = 0.5

Q: A factory that manufactures screws is performing a quality control experiment. Each object should…

A: Given, Population mean = 16 Sample size =79 Sample mean =16.01 Population standard deviation = 0.17…

Q: It is necessary for an automobile producer to estimate the number of miles per gallon achieved by…

A: The provided information are:

Q: The FleetFoot Shoe company claims that the average yearly salary of its workers is $29,800. The…

A: The average yearly salary of the worker is $29800. The standard deviation of the salary of worker is…

Q: If other factors are held constant, which combination is most likely to result in rejecting the null…

A: A large sample size and a small population standard deviation

Q: Perform the following hypothesis test: Ho: H = 10 H1: µ * 10 The sample mean is 9.85, population…

A:

Q: Which of the following is not needed to compute a t-statistic, and do a one-sample t-test? (Hint:…

A: Formula for t statistic :

Q: The fill volume of a random sample 37 cans of Coke were found to have a mean of x¯=12.15 with…

A: We have given that  Sample size n= 37 Xbar= 12.5 Standard deviation s= 0.12

Q: A nutritionist claims that the mean tuna consumption by a person is 3.5 pounds per year. A sample of…

A:

Q: A consumer advocacy group suspects that a local supermarket's 7-ounce packages of cheddar cheese…

A:

Q: The manufacturer of a new compact car claims that the car will average at least 35 miles per gallon…

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

Q: A medical researcher wishes to see whether the pulse rates of smokers are higher than the pulse…

A:

Q: The population mean of the heights of five-year old boys is 100cm. A teacher measures the height of…

A:

Q: A survey using a sample size of 11 reveals that the average size of dairy farms in Simcoe County is…

A: t-test is a parametric test which is used to compare the mean of one or two samples. It is a small…

Q: a) Compute the mean number of yellow eggs in samples of 58 eggs? (that is the same as asking for the…

A: Here use binomial theorem  Finite number of trial (n=58) Each trial independent from each other…

Q: The student senate at a large university feels that their seniors have a debt much less than $3,150,…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: According to a Health of Boston report, female residents in Boston have a higher average life…

A: Given: The population standard deviations of life expectancy are 8.2 and 8.6 for females and males…

Q: manufacturer states that its product contains on average less than 5 parts per million (ppm) of…

A: As the population standard deviation is not known, we will use t distribution. As Vape manufacturer…

Q: "On the Standford-Binet test, the mean IQ is 100. A class of 13 kindergarten pupils were tested with…

A: We have given,  sample size n =13 sample mean x̄ = 94 sample standard deviation s= 4.65…

Q: It is necessary for an automobile producer to estimate the number of miles per gallon achieved by…

A:

Q: If the population standard deviation is unknown, what test statistic is to be used? a. t-test b.…

A: If the population standard deviation sigma  is known then z statistic is used.

Q: Crispy Biscuit Manufacturers label the calorie content of 400 cal per 250 gram package. The Consumer…

A: Given Information: Sample size (n) = 100 Sample mean (x¯) = 406 cal Sample standard deviation (s) =…

Q: What Influences the Sample Size Needed? In this exercise, we examine the effect of the value of the…

A:

Q: Given a sample mean of 83, a sample standard deviation of 12.5, and a sample size of 22, test the…

A:

Q: Solve the problems by following the steps and procedures in hypothesis testing. 2. A soda…

A: Given that the soda manufacturer is interested in determining whether its bottling machine tends to…

Q: Consider the tollowing hypothesis test Using a candom sample of size 35 with a sa mean of 92 from a…

A: Given: Population mean(μ)=90x¯=92Standard deviation(σ)=28Sample size(n)=35

Q: Consider the following hypothesis test: H 0:   20 H a:  < 20 A sample of 50 provided a sample…

A:

Q: The average income in a certain area is assumed to be approximately $35,000. Assume the standard…

A: Hg igucjcovhxihcigkb

Q: Given that x is a normal variable with mean = 47 and standard deviation = 6.3, find the following…

A: From the provided information, Mean (µ) = 47 Standard deviation (σ) = 6.3 X ~N (47, 6.3)

Q: A health professional is concerned that people in Blount County are eating more smoRed than average.…

A: Given Information: Sample size n=49 Sample mean x¯=14 pounds Hypothesized value of population mean…

Q: school juniors worked more hours per week than high school seniors. His findings are in the table…

A: Given that  Senior  Junior Mean 18.5 19.1 Population Standard Deviation 7.1 8.4 Sample size…

Q: A sample of 35 observations is selected from a normal population. The sample mean is 29, and the…

A: Null hypothesis: H0 : μ ≤ 28. Alternative hypothesis: H1 : μ >28 a) The test is right tailed. The…

Q: Formulate the null and alternative hypothesis

A: Given: A sample means the annual salary of public school teachers is $47,000. sample size n=95…

Q: A medical investigation claims that the average number of Infections per week at a hospital in…

A: Given:  Test: μ≠16.3 with t distribution  Hypothesis test: H0: μ = 16.3Ha: μ ≠ 16.3 This is two…

Q: Shorney construction company bids on projects assuming that the mean idle time perworker is 72 or…

A:

Q: Nationwide, the average salary of actuaries who achieve the rank of Fellow is $155,000. An insurance…

A: Given, μ=155,000 x-=152,000 s=7,000 n=15 α=0.01

Q: A recent national survey found that high school students watched an average (mean) of 7.0 movies per…

A: 1.Null and alternative hypotheses:Null hypothesis:H0: µ = 7.0.That is, the average movies watched by…

Q: Assume that random variable X distributed normal with mean u and variance o?. Use following summary…

A: Given that  n=8 ΣX=393 ΣX2=21027 Σ(X-Xbar)2=SSxx=1720.88 Note: According to bartleby experts…

Q: In a hypothesis test about a population mean with a known population standard deviation, of H0 : µ =…

A: Introduction: The null and alternative hypotheses for testing for a population mean are given as:…

Q: State the null hypothesis, the test statistic, one or two tailed?, decision rule for rejecting null…

A: Solution: State the hypotheses. Null hypothesis: That is, the mean rating of the jeep is 40.5…

Q: Test the claim that the mean GPA of night students is larger than 2 at the .025 significance level.…

A: Solution: Let X be the GPA of night student. From the given information, x-bar=2.03, S=0.06 and…

Q: It is necessary for an automobile producer to estimate the number of miles per gallon achieved by…

A: Given data: Significance level = 0.05

Q: he National Weather Service says that the mean daily high temperature for October in a large…

A: The hypothesized mean is 56.

Q: Do a hypothesis for the following, make sure to include and label all five steps:   Test the claim…

A:

Q: An engineering research center claims that through the use of a new computer control system,…

A: Given: μ0=3n=100x¯=2.4s=1.8 The significance level is taken as 0.05

Q: A sample of 30 items provided a sample mean of 28 and a sample standard deviation of 6. Test the…

A: State the hypotheses. That is, the true population variance equals 25. That is, the true…

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.