Do the produced nails exceed the specification of the engineer at a 1% level of significance. 1. What is the sample size of the problem? 2. Using the formula for z-test, what is the computed value?

Q: Show all your work. Indicate clearly the methods you use, because you will be scored on the…

A: To find (a) to find the z-scores for a weight of 13 ounces for a bird living in the northern region…

Q: The data in photo attached show the number of births per 1000 population in samples taken…

A: Considering the African countries, we need to test the hypothesis that the standard deviation of the…

Q: he ground has been improved to increase the strength of a ground. The average compressive strength…

A: The provided sample means are shown below: Xˉ1=31\bar X_1 = 31 Xˉ2=38\bar X_2 = 38 X Also, the…

Q: The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we…

A: It is given that confidence level is 0.95, population standard deviation is 3.7, and the margin of…

Q: I have sent the picture below of the question I need answered

A: Given Information- Data given for the sitting back-to-knee length for a group of adults is given…

Q: 1. Collected data shows that about 220,o00 high schoolers took the AP in 2020. The FRQ section of…

A: Given data is appropriate for testing of hypothesis .for z-test for single mean for large sample…

Q: what will be the value of X at the z score =-2.5 given, mean=45 and standard deviation =5?

A: Mean = 45 Standard deviation = 5  Z score =-2.5 We have to find X score  for given data...

Q: The number of ants per acre in the forest is normally distributed with mean 44,000 and standard…

A: Given X is normal Distributed with mean µ = 44000.0 and standard deviation σ = 12355.0 now will…

Q: ble and highest possibel marks assuming normal distributiion .

A: P(X<5)=Pz<5-589=0

Q: There is concern that increased industrialization may be increasing the mineral content of river…

A: Null hypothesis: µ ≤ 5. Alternative hypothesis: µ >5. Here, the sample mean, x-bar is 5.6.…

Q: Normal Distribution 1. A blood pressure test was given to 450 women ages 20 to 36. It showed that…

A:

Q: The population mean ACT composite score in 2015 was 20.8 points, with population standard deviation…

A:

Q: The average age of a part-time seasonal employee at a hotel has historically been 37 years. This…

A: Since the standard deviation is known, we use z test for one sample. The test statistic is given as-…

Q: 3. A sample of 26 pieces of data is collected and we wish to perform the a=.05 level test Ho:u=6 vs.…

A: Given , Hypothesis : H0 : μ= 6 H1 : μ> 6 Right tailed test. Test statistic = z = 1.61

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 264.7…

A: a) Obtain the approximate percentage of women with platelet counts within 2 standard deviations of…

Q: Consider a large population with p = proportion for a sample size of 410. Round your answer for…

A: It is given that p=0.23 and n=410.

Q: Weschler Adult Intelligence scores (WAIS) is normal with a mean of 100 and population standard…

A: Given that,population mean(u)=100standard deviation, σ =15sample mean = sum of observations/ count…

Q: Suppose 170 geology students measure the mass of an ore sample. Due to human error and limitations…

A: n=170 Mean=86 Standard deviation=3

Q: An examination was given to 50 students of a college A and to 60 students at College B. At A, the…

A: From the provided information,

Q: It has long been stated that the mean temperature of humans is 98.6°F. However, two researchers…

A:

Q: The average birthweight of newborns at a local hospital have a normal distribution with a mean of…

A: The data is normally distributed.Mean,  lbStandard deviation,  lb

Q: You are responsible for admitting applicants to your law school. Your average applicant has an LSAT…

A:

Q: 4. First find the difference between the measured value and the mean, then divide that difference by…

A: Given, z-score = 0.875 standard deviation = 0.0008

Q: The average amount of rainfall during the summer months for the midwestern part of the US is more…

A: Given : Claim : The mean rainfall in the Midwest is more than 13 inches.

Q: For a standardized exam at your school, the mean score is 103 with a standard deviation of 16. You…

A: Population mean Hypothesized value of population standard deviation Sample size Sample mean Sample…

Q: It has long been stated that the mean temperature of humans is 98.6°F. However, two researchers…

A: Degrees of freedom = n-1 = 275 - 1 = 274

Q: A survey found that the average hotel room rates and standard deviations for the state of…

A: We want to find the p value

Q: It has long been stated that the mean temperature of humans is 98.6°F. However, two researchers…

A:

Q: The average starting salary of students who graduated from colleges of Business in 2009 was $48,400.…

A:

Q: A survey found that the average hotel room rates and standard deviations for the state of Minnesota…

A: We have given that  Sample sizes n1=92      , n2= 90      Sample means X̄1= 349.44  , X̄2=  360.89…

Q: Height and age: Are older men shorter than younger men? According to a national report, the mean…

A:

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean od 262 days…

A: Given info: The lengths of pregnancies (x) is normally distributed with mean 262 days and standard…

Q: You are in charge of quality control for the production of…

A: To calculate the required sample size.

Q: A survey found that the average hotel room rates and standard deviations for the state of…

A:

Q: Brewed decaffeinated coffee contains some caffeine. We want to estimate the amount of caffeine in 8…

A: Formula :

Q: A simple random sample of pulse rates of 25 women from a normally distributed population results in…

A:

Q: A civil service exam yields scores which are normally distributed with a mean of 81 and a standard…

A: Solution-: Given: μ=81, σ=5.5 We want to fin x such that, P[X<x]=0.15

Q: Consider a large population with p = 0.24. Assuming ≤ 0.05, find the mean and standar proportion for…

A: It is given that p=0.24 and n=840.

Q: In contrast, the mean adult female height in the Netherlands is 169 cm with a standard deviation of…

A:

Q: The height of seaweed of all plants in a body of water are normally distributed with a mean of 10 cm…

A: It is given that the mean is 10 and standard deviation is 2.

Q: The fill of 100 gram paxkets of peanuts is normally distributed with a mean of 99.8 grams and…

A: given data  normal distribution given data normal distributionμ = 99.8over weight if x>100P(over…

Q: earhorcout Coubionud ecoLea 21. Use the Empirical rule to solve the problem. (5pt The amount of…

A: