ey found that the average hotel room rate in State I is RM88.22 and the average room in State II is RM80.61. Assume that the data were obtained from two samples of 50 hotels each. The population standard deviations were RM5.62 and RM4.83 respectively. At α = 0.05 , can it be concluded that there is a significant difference in the rates?

Q: Use z scores to compare the given values.   Based on sample​ data, newborn males have weights with a…

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: Given a sample mean of xbar=27 and a population standard deviation of σ=3.5 from a previous study…

A: Givensample size(n)=16mean (x)=27standard deviation(σ)=3.5 claim:-μ<30α=0.05

Q: In recent years, a number of companies have been formed that offer competition to AT&T in…

A: Here, we need to know whether the mean monthly long-distance bill is different from $17.09

Q: Based on sample​ data, newborn males have weights with a mean of 3284.4 g and a standard deviation…

A: From the provided information, Newborn male have weights with mean (µM) = 3284.4 g Standard…

Q: In a survey of adults with diabetes, the average body mass index (BMI) in a sample of 1924 women was…

A:

Q: y definition, jumbo shrimp are those that require between 10 and 15 shrimp to make a pound. Suppose…

A:

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: It tells the number of standard deviations the value x is away from the mean.

Q: The temperature of a newborn baby is normally distributed with a mean of 97.7 °F and a standard…

A: The random variable temperature of a newborn baby is normally distributed. The population mean is…

Q: Let us assume that the mean dissolve times of two shapes of an ibuprofen tablet are normally…

A: Given : Claim : The mean dissolve times differ between the two shapes.

Q: A treatment is administered to a sample selected from a population with a mean of u = 34 and a…

A: Given : Mean (m1) =34 SStandard deviation (s) =8 d=0.00 We need to find mean for the treated sample…

Q: Assume the samples are random and independent and the populations are normally distributed. A marine…

A: Given problem is :   Assume the samples are random and independent and the populations are…

Q: A nicotine contents of a certain brand of cigarette shows that on the average one cigarette contains…

A: Since Chebyshev's theorem is to be used to find the nicotine content within certain standard…

Q: The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

A: Chebyshev's theorem and empirical rule are used to calculate the percentages of data lies within…

Q: Assume the model: Y = 5 - 2X + e , where e ~ N(0,81) What is the expected value of Y when X =1?…

A: The expected value when X = 1 is given by E(Y) = E(5) - E(2) +E(e) E(Y) = 5 - 2 E(Y) =3

Q: Bob has a bulb factory that produces two types of bulbs: white light (x) and color light (y). It is…

A:

Q: The social worker for a particular town claims the average monthly cost for childcare outside the…

A:

Q: The body temperatures of a group of healthy adults have a​ bell-shaped distribution with a mean of…

A: a. Empirical rule: The probability that the observation under the normal curve lies within 1…

Q: Based on sample data, newborn males have weights with a mean of 3282.2 g and a standard deviation of…

A: Given,  Mean weight of male newborn μm=3282.2g  Standard deviatiation male of newborn σm=883.5 g…

Q: I'm not sure what t-value is in order so solve for it.

A: The t-distribution is used, because the population standard deviation is unknown and the sample…

Q: For a population with mean mu = 72 and a standard deviation of sigma = 10, what is the standard…

A:

Q: Approximately (  blank) % have body temperatures within 2 standard deviations of the​ mean, or…

A: Given : The body temperatures of a group of healthy adults have a​ bell-shaped distribution with a…

Q: A homeowner estimates that within the range of likely temperatures his January heating bill, Y, in…

A: Given : Y = 290 - 5T Where T is a r.v with Mean (μT) = 24 S.D (σT) = 4

Q: In order to ensure the consistency of their product, the Oriental Spice Sauce company has a strict…

A:

Q: A simple random sample from a population with a normal distribution of 99 body temperatures has…

A: Given information- Sample size, n = 99 Mean, x-bar = 98.20℉ Sample standard deviation, s = 62℉…

Q: The standard deviation of the measurements made by a special thermocouple is assumed to be 0.005 °…

A: Let σ be the population standard deviation of measurements made by a special thermocouple. The claim…

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

A:

Q: A study claims tha.t on average, male high school students spend at least 3.39 hours a day playing…

A: The summary of the statistics is, x¯=4.12,σ=2.05,n=30μ=3.39 The formula for calculating the z-score…

Q: Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally​…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: A treatment is administered to a sample of n = 9 individuals selected from a population with a mean…

A: Given: n=9, μ=80, σ=12, d=0.50 Cohen’s d effect size is calculated as follows: Cohen's…

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: Given that, mean(μ)=3274.7  (for male) standard deviation(σ)= 627.7  x= 1700  and  mean(μ)=3038.5 (…

Q: It is desirable to compare the yields of two different types of wheat seeds. An average of 575 kg of…

A:

Q: A manufacturing firm claims that the batteries used in their electronic games will last an average…

A: Consider that μ defines the population mean lifetime of batteries.

Q: For all samples of size 81, randomly selected from a population of IQ scores with a population mean…

A: We have to calculate mean and SD for the sample mean.

Q: Use z scores to compare the given values.   Based on sample​ data, newborn males have weights with a…

A:

Q: In a random sample of 7 cell​ phones, the mean full retail price was ​$512.60 and the standard…

A: From the provided information, Sample size (n) = 7 Sample mean (x̅) = $512.60 Sample standard…

Q: Given that x represents the random variable for mass of potatoes and is approximately normally…

A:

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: Given for males : x¯=3204.8 gs=770.8 g Given for females : x¯=3066.5 gs=585.9 g

Q: In a region, the correlation coefficient between corn yield and peanut yield (planted in the same…

A: Solution: Given information. The independent variable is peanut yield  (x)  The depedent variable is…

Q: For the same random sample of adult women, with a sample mean height of x¯=64.3 inches and sample…

A: Empirical rule: The empirical rule is given as follows: About 68% of data values fall within one…

Q: Use z scores to compare the given values. Based on sample data, newborn males have weights with a…

A: Given: For newborn males: Meanμ=3293.7Standard Deviationσ=551.3 The z-score for X=1700 g is given…

Q: The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

A: Given that, Mean = 98.34 Standard deviation = 0.56

Q: The weights of a certain brand of candies are normally distributed with a mean weight of 0.8554g and…

A:

Q: A sample of 50 student ages is taken from a bell-shaped population with a mean age (µ) of 21.2 years…

A: We have given that  Sample size=n=50 Mean=mu=21.2 Standard deviation=sigma=2.8…

Q: The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

A: Given information: μ=98.39σ=0.56 Empirical Rule: 68% of values lies between one standard…

Q: The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

A: According to the empirical rule, in the standard normal curve, approximately 68% of the area is…

Q: Use the scores to compare the given values. Based on sample data, newborn males have weights with a…

A:

Q: ssume that the readings at freezing on a batch of thermometers are normally distributed with a mean…

A: Given that   The readings at freezing on a batch of thermometers are normally distributed. Mean (μ)…

Q: A random sample of 14 observations taken from a population that is normally distributed produced a…

A: Given data: Sample  mean = 212.37 Sample standard deviation  = 16.35 Significance level  = 0.1 To…

Q: The body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.