A manufacturer of automatic car transmissions uses steel gears. An important characteristic of these gears is their hardness. An experiment is conducted to compare gears made from three different steel alloys, that is, three different compositions of steel. Gears made from each of these steel alloys were heat-treated or hardened at two different temperature levels, 1600 and 1800 °F. Twelve gears of each of the three different steel alloys were available -- six were randomly assigned to each of the two temperature levels.  For this experimental situation: How many different treatment combinations will there be? Create the design table and how many total experimental units will be needed for this experiment?

Q: Suppose we randomly sample 50 diabetics from among Irvine residents for a research study, and then…

A: From the provided we have the observed and expected frequency computed as below: Diabetic…

Q: An agricultural scientist tests six types of fertilizer, labeled A, B, C, D, E, and F, to determine…

A:

Q: In a survey, two independent random samples of workers of sizes m = 124 and n = 130 from two…

A: Given: n1 = 124 n2 = 130 First sample proportion p1 = 106/124 = 0.8548 Second sample proportion p2 =…

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A: From the provided information, Sample size (n) = 12 Level of significance (α) = 0.01

Q: At the Blood Bank, they know that O+ blood is the most common blood type and that 40% of the people…

A: Binomial distribution: The probability mass function (pmf) of a binomial random variable X is given…

Q: A local dairy conducted taste tests of their nonfat and low fat cream cheese spreads at three…

A: so,The table shows No.of eople were tested at each location A,B,C and their preferenceso,(a) so from…

Q: A product development scientist is tasked with determining which of three methods is the most…

A:

Q: A study published in the the journal Public Library of Science took 134 people, who were at risk of…

A:

Q: The owner of a chain of mini-markets wants to compare the sales performance of two of her stores,…

A: To determine: To test the hypothesis that the mean daily sales of the two stores differ. Given data:…

Q: A research study examined the effects of type of material and temperature on the lifetime of a…

A: Given data A research study examined the effects of type of material and temperature on life time of…

Q: An ornithologist thinks that injections of follicle-stimulating hormone (FSH) increase the singing…

A: Given information: Saline FSH 17 10 31 29 14 37 12 41 29 16 23 45 7 34 19 57…

Q: Results from a survey conducted in a certain grocery store showed that 3 out of 5 people preferred…

A:

Q: In the recent Census, three percent of the U.S. population reported being of two or more races.…

A:

Q: Let p, and p, be the respective proportions of women with iron-deficiency anemia in each of two…

A:

Q: A personal computer manufacturer is interested in comparing assembly times for two keyboard assembly…

A: It is been asked to test whether the mean assembly times for the two processes differ, the…

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A: a) Assume that µd is the true mean difference in tread wear for the two brands of tires (Brand 1 and…

Q: A graduate student realized that the depression study above in Question 4 should have had a placebo…

A:

Q: A research study examined the effects of type of material and temperature on the lifetime of a…

A: The number of materials (m) is 3.

Q: In a random sample of 300 patients with rheumatoid arthritis, 192 of them responded favourably to a…

A:

Q: Let p, and p, be the respective proportions of women with iron-deficiency anemia in each of two…

A: Given that,sample one, x1 =469, n1 =1800, p1= x1/n1=0.2606sample two, x2 =531, n2 =2000, p2=…

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

A: Hi! Thank you for posting the question. Since your question has more than three sub-parts, we have…

Q: In a sample of 137 leopards selected randomly from one preserve, it is found that 7 of them have…

A: H0 : p = 0.13 H1: p ≠ 0.13

Q: A high school is proud of its advanced chemistry class, in which its 16 students scored an average…

A:

Q: A random sample of 148 small businesses was taken. During a 5 year time frame, 16 of the 106…

A: Businesses headed by men : total = 106 Failed = 16 success = 90   Businesses headed by women: total…

Q: A random sample of 50 suspension helmets used by motorcycle riders and automobile race-car drivers…

A:

Q: A researcher wants to study the impact of a new artificial sweetener on blood glucose. He is…

A: The appropriate experiment is to be identified, where the two-sample z-test can be applied to…

Q: construct a 95% C.I. for the actual; percentage of shoppers who live more than 15 miles from that…

A: The sample size is n = 200 Proportion of shoppers who live more than 15 miles from that center in…

Q: A sample of 100 college students is selected from all students registered at a certain college, and…

A: a. From the given information, it is observed that the sample of 100 college students selected from…

Q: A smartphone manufacturer admits that 12% of the smartphones they make have defects that could…

A: 1. Given that X=the number of smartphones manufactured by this company that have defects that could…

Q: Some researchers have conjectured that stem-pitting disease in peach tree seedlings might be…

A:

Q: 3. At Community Hospital, the burn center is experimenting with a new plasma compress treatment. A…

A: Sample sizes : n1=316n2=419 Patients with minor burns received the plasma compress treatment:…

Q: A random sample of 750 registered voters in Phoenix is asked if they favor the use of oxygenated…

A:

Q: From the given sample of 516 people we have 235 people who like the old recipe and 281 people like…

A: It is an important part of statistics. It is widely used.

Q: The contingency table shows the result of a random sample of students by Ziyi Zhang at PCC and the…

A: Given: α=0.05

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A: Given Information: No. of Brands=2No. of observations=12Variable of interest=Amount of tread wear(…

Q: A research study examined the effects of type of material and temperature on the lifetime of a…

A:

Q: A local jam production company is confident that 60% of the population will like its new grapefruit…

A: Here events are independent.

Q: From the U.S. Census Bureau and the article “U.S.prison population falls for third by B. Montopoli…

A: see the handwritten solution

Q: A graduate student realized that the depression study above in Question 4 should have had a placebo…

A: Hello there! According to our honor code can answer only three sub parts per question at a time.…

Q: A local dairy conducted taste tests of their nonfat and low fat cream cheese spreads at three…

A: Given information: xA=167, nA=258xA=151, nA=315xA=90, nA=152

Q: A simple random sample of size n=14 is obtained from a population with μ=67 and σ=19.   Assuming…

A: From the given information, Consider,  Sample size (n) = 14 Population with μ=67 and σ=19. Thus,

Q: In a survey of 460   drivers from the​ South, 397   wear a seat belt. In a survey of 340…

A: Given Information: Number of drivers surveyed from south, n1 =460. Number of drivers who wear seat…

Q: Suppose it is known that in a certain community 30% of the household have a micro-wave oven. if we…

A: Solution: Let X represent the number of household have a micro-wave oven.

Q: mputer manufacturer is interested in comparing assembly times for two keyboard assembly processes.…

A: Degrees of freedom = n-1 = 8-1 = 7

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: In a survey it was found out that 60 out of 170 females and 32 out of 128 males preferred a certain…

A: The test hypotheses are: Null hypothesis: H0: p1 = p2, that is, there is no sex difference in the…

Q: A survey was conducted of newlyweds in a country who have a spouse of a different race or ethnicity…

A: Given : p1 : the proportion of newlyweds in Ethnicity A who have a spouse of a different race or…

Q: A consumer products testing group is evaluating two competing brands of tires, Brand 1 and Brand 2.…

A:

Q: From historical data at a local restaurant indicate that 60% of the customers order coffee, 15%…

A: Given information- We have given historical data of a local restaurant. The owner of the restaurant…

Q: 3 out of 4 american adults under age 35 have eaten pizza for breakfast. if a random sample of 20…

A: Let the R.V X denotes the number of adults eaten pizza for breakfast and it follows the binomial…

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.