A company produces water disinfection products and packs it in 1 kg sachets with a population  standard deviation of 26 grams. A new low-cost packing machine is under test; if the weight of the  packed sachets show more variability, it would be undesirable. A sample of 20 packets yielded s = 35.0 grams, in line with suspicions. As a check, the company wishes to test H0: σ ≤ 26 g against H1: σ > 26  g at a significance level of 5%. [Hint: Use one sided chi- square test]

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 262.2…

A: The mean is 262.2 and the standard deviation is 61.4.

Q: Step 5 of 6:  Identify the level of significance for the hypothesis test.

A: Given that  The population standard deviation is known to be 1.9

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.1…

A: μ = 263.1σ = 66.9Normal distributionempirical rule:68-95-99.7% data fall withikn1σ-2σ-3σ of μ…

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

A: The provided information are:

Q: A tourist agency in Manila claims the mean daily cost of meals and lodging for a family of 4…

A:

Q: the body temperature of two species of geckos were measured. the n1 = 10 geckos from species A had a…

A: Consider, the pooled variance, spooled2=(n1-1)s12+(n2-1)s22n1+n2-2…

Q: Sony would like to test the hypothesis that the average age of a PlayStation user is different from…

A: Step 1: It is considered that μ1 and μ2 define the population average age of PlayStation users…

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

A: From given data we have : μ=98.6s=1.1n=275x¯=98.3

Q: An almond milk distributor wants to determine whether the mean amount of almond milk contained in a…

A:

Q: The mean pulse rate of a random sample of 40 males was 67.3 bpm. For a ransom sample of 40 females…

A: Let μ1 denotes the population mean pulse rate for males, and μ2 denotes the population mean pulse…

Q: The blood platelet counts ofa group of women have a bell-shaped distribution with a mean of 253.1…

A:

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

A: Given Data: Population mean (μ)=16 Population Standard Deviation (σ)=0.15   Sample mean=15.92 n=95

Q: statistics student randomly selected 45 packets of sugar and weighed the contents of each​ packet,…

A: Given data: Mean = 3.5 g Sample mean = 3.586 g Standard deviation  = 0.195 g Sample size  = 45…

Q: The piston diameter of a certain hand pump is 0.7 inch. The manager determines that the diameters…

A: given that, mean = μ = 0.7 standard deviation = σ = 0.005 n = 27 sample standard deviation = s =…

Q: Previously an organization reported that American teenagers spent an average of 4.5 hours per week…

A: For the parameter, μ as the true average hour spent by American teenagers, under the alternate…

Q: At my work there is a fancy coffee machine that dispenses 120 ml of coffee, but I believe that the…

A: Given data and calculation for sample standard deviation is shown below Hypothesized mean = 120 ml…

Q: A psychologist reports that the average length of R.E.M. sleep in his test subjects was 10 minutes.…

A: Hypothesis Testing: Hypothesis is a procedure by which we can tests an assumption regarding a…

Q: doctor wants to determine if a special diet increases the birth weights of babies. The mean birth…

A:

Q: The average weight of new-born kittens is 3.5 ounces. A breeder suspects one of her cats, Stella,…

A:

Q: From previous experience, the owner of an apple orchard knows that the mean weight of Gala apples is…

A: Null hypothesis: H0:μ=140 The mean weight of Gala apples is 140 grams. Alternative hypothesis:…

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

A:

Q: An automobile manufacturer has given its van a 50.750.7 miles/gallon (MPG) rating. An independent…

A:

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

A: The blood platelet counts of a group of women have a​ bell-shaped distribution. Bell-shaped…

Q: a. Find the null and alternative hypothesis b. What does the random variable X represent? c. State…

A: Let μ be the population mean lifespan of tires. Given that, Population mean (μ)=50,000…

Q: The Toylot company makes an electric train with a motor that it claims will draw an average of no…

A:

Q: A company claims that the mean weight per apple they ship is 120 grams with a standard deviation of…

A: given data n = 49x¯ = 122.5σ = 12claim : μ= 120

Q: The manufacturer of a particular brand of tires claims they average at least 50,000 miles before…

A: Given information Population mean µ = 50000 Sample size n = 30 Sample mean x̅ = 43500 Standard…

Q: What is the approximate percentage of women with platelet counts within 3 standard deviations of…

A:

Q: What is the value of my test statistics?

A: Given that Sample size n = 36 Sample mean = 12.5 Population SD = 2 Level of significance = 0.05

Q: The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 260.4…

A: Given: μ=260.4σ=62.6 The empirical rule states that 68% of values lie within one standard deviation…

Q: We should use a z-test or a t-test? State the reason you choose that distribution. b. State the…

A: Note : According to our guidelines we are solving first three sub-parts of a question and the rest…

Q: A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: A manufacturer's process produces basketballs that have a population mean diameter of 9.47 inches…

A:

Q: An automobile manufacturer claims that its car has a 37.9 miles/gallon (MPG) rating. An independent…

A: population mean()=37.9sample size(n)=140Mean()=38.2standard deviation()=1.2significance level()=0.01

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.4…

A:

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

A: The provided information is  x¯=13.93  centimetersσ=0.22n=89 The factory that manufactures screws is…

Q: The health of employees is monitored by periodically weighing them in. A sample of 54 employees has…

A: The summary of statistics is, x¯=185.6,s=125.6,n=54

Q: The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 263.2…

A:

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

A: Given, Sample size = 60 Sample mean = 16.03 Population standard deviation = 0.19   Under the claim,…

Q: An industrial company claims that the mean pH level of the water in a nearby river is6.8. You…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 245.4…

A:

Q: An industrial company claims that the mean pH level of the water in a nearby river is 6.8. You…

A: given data n = 19x¯ =6.7s = 0.24α = 0.05claim : μ ≠ 6.8

Q: The CDC is concerned that teenagers are being pushed into too many out-of-school activities. Their…

A: The level of significance is 0.01.