a random sample of size 11 from a normal distribution has standard deviation  s=98. test Ho: standard deviation=70 versus H1: standard deviation >70. use the a at 0.05 level of significance

Q: The daily production of a factory is normally distributed with mean 6.4 tons and standard deviation…

A: Answer: From the given data, Let X represent the daily production of a factory X is normally…

Q: The mean jumping height of a sample of 79 university athletes is 89.6 cm with standard deviation of…

A: The objective of this question is to calculate the t-value, which is a measure of the difference…

Q: Assume that the scores of a college entry exam are normally distributed with a mean of 400 and a…

A: Given,mean(μ)=400standard deviation(σ)=60

Q: car company says that the mean gas mileage for its luxury sedan is at least 25 miles per gallon​…

A:

Q: The heights of the 430 Candidates for the Elite Military Unit have an approximate normal…

A:

Q: Score on the SAT are normally distributed with a mean of 500 and a standard deviation of 100. The…

A:

Q: For a sample of 12 items from a normally dis￾tributed population for which the standard deviation is…

A: Provided information is ;  sample size(n) =  12 items  population standard deviation(σ ) =  17.0,…

Q: The mean SAT score in mathematics, u, is 518. The standard deviation of these scores is 37. A…

A: As per Bartleby guideline expert have to answer first three subparts only...

Q: Consider a value to be significantly low if its z score less than or equal to minus−2 or consider…

A: In the question the values are printed two times as 19.419.4. For convenience, the values are taken…

Q: The distribution of average hours of sleep per weeknight among college students is found to be…

A: Concept: Z is known as Standard normal variable used for calculating area under normal curve Z=…

Q: For a sample of 35 items from a population for which the standard deviation is 5 20.5, the sample…

A: Given data is appropriate for z-test for single mean . because it is a large sample test (n>30).…

Q: A. State the appropriate null and alternate hypotheses B. Compute the value of the test statistics…

A: H0 : μ = 20.8 H1 : μ ≠ 20.8 we have the population standard deviation = 10 therefore we will use the…

Q: A light bulb manufacturer guarantees the mean life of a light bulb is at least 731 hours. A random…

A: Given,

Q: a fish market owners average weight of fish is 3,2kg and standart deviation is 0.8kg and has a…

A: We have to find given probability.

Q: The weights of discarded plastic from a sample of 62 households have a mean weight of 1.911 lbs. The…

A: From the provided information, Sample size (n) = 62 Sample mean (x̅) = 1.911 lbs Standard deviation…

Q: The height (in inches) of males in the U.S. are believed to be normally distributed. the average…

A: The sample standard deviation s is equal to the standard deviation of the population sigma divided…

Q: The overhead reach distances of adult females are normally distributed with a mean of 205.5 cm and a…

A:

Q: Daily Driving The average number of miles a person drives per day is 24. A researcher wishes to see…

A: Claim : people over age 60drive less than 24miles per day.

Q: During an economic​ crisis, the average value of homes in a community of 36 homes lost ​$9589 with…

A: Consider that μ defines the population mean amount homes.

Q: or this study, we should use Select an answer z-test for a population proportion t-test for a…

A: Concept: The one-sample t-test is a statistical technique that used to define whether a sample of…

Q: A coffee packaging plant claims that the mean weight of coffee in its containers is at least 32…

A: Introduction: Denote μ as the true mean weight of coffee in the containers packed by the coffee…

Q: 6. The following sample of n = from a population with unknown parameters. 6 scores was obtained…

A: Given scores is7,1,6,3,6,7sample size(n)=6Let"x" be the set of given scoresx={7,1,6,3,6,7}

Q: For a sample of 35 items from a population for which the standard deviation is 5 20.5, the sample…

A: Given data is appropriate for z-test for single mean. because it is a large sample test .(n>30)

Q: The average of the grades obtained in an exam shows a normal distribution with 56 and a standard…

A: We have to find the lowest grade to pass..

Q: The average American consumes 93 liters of alcohol per year. Does the average college student…

A:

Q: Historically, a certain region has experienced 65 thunder days annually. (A "thunder day" is day on…

A: Given : sample mean = 53 sample standard deviation = 22 sample size = n = 11 Population mean = 62

Q: The amount of sugar was measured for a sample of 30 different breakfast cereals.  The sample mean…

A: Given  X=1.6, n=30, mean=10.4 Standard deviation=s=5.3 We want to find Z score

Q: The average American consumes 92 liters of alcohol per year. Does the average college student…

A: From the given information, Consider, X be the random variable that shows the amount of alcohol…

Q: Give the z-scores for the teacher that are 30 years old and 63 years old (round to two decimal…

A: Introduction: For a random variable, X with mean μ, and standard deviation σ, the z-score is given…

Q: A sample of 30 sales records from a convenience store has mean of R140. It is known that the…

A: Given : Sample size (n) = 30 Sample mean (X¯) = 140 S.D (σ) = 30 Level of significance (α) = 0.05…

Q: An internet provider has analyzed the amount of time its customers are online per session. It found…

A: We have given that,  The amount of time is normally distributed with mean (mu) = 44 ans and standard…

Q: The duration of human pregnancies are normally distributed with a mean of 267 days and a standard…

A: The duration of human pregnancies are normally distributed with a mean of 267 days and a standard…

Q: he daily production of a factory is normally distributed with mean 7.8 tons and standard deviation…

A: Answer: From the given data, Mean (μ) = 7.8 Standard deviation(σ) = 0.65 Sample size(n) = 23

Q: a) State the null hypothesis H, and the alternative hypothesis H1: H, :0 H :0 b) Determine the type…

A: We have to complete hypothesis testing.....

Q: is there evidence that the mean life is different from 7520 hours?   What is the test​ statistic?…

A: It is given that  Population mean = 7520 Sample mean = 7310 Population standard deviation = 980…

Q: Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone…

A: Here, the sample size is 9 that is reasonably small. The population standard deviation is unknown…

Q: A recent study done on college students found that the mean time they spend on homework assignments…

A: Given data,Mean μ=6.5sd     σ=1.2n=50Describe the sampling  distribution of sample mean

Q: The length of time it takes to find a parking space at the local grocery store, follows a normal…

A: See the handwritten solution

Q: Assume the average amount of caffeine consumed daily by adults is normally distributed with a mean…

A: The detailed solution is as follows below:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.