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: 2. Since the mean is computed from individual observed values, each of which contains an error, the…

A: Formula is given below.

Q: The correlation between the depth (in feet) and length (in feet) for a sample of caves is found to…

A:

Q: car owner determines that annual repair costs (R) can be estimated based on the number of miles…

A: The property of the standard deviation is,.

Q: The 160 heights of males from a data set of body measurements vary from a low of 160.0 cm to a high…

A: The formula of standard deviation using the range rule of thumb is, Where,   R denotes the range.…

Q: A random sample of 85 eighth grade​ students' scores on a national mathematics assessment test has a…

A: From the provided information, Sample size (n) = 85 Sample mean (x̅) = 285 Population standard…

Q: In a sample of 13 randomly selected high school seniors, the mean score on a standardized test was…

A: Given information, x¯=1185s=160.7μ=1016n=13 t value: t=x¯-μsn =1185-1016160.713  =3.79

Q: 1. Consider the data for the double occupancy room rates in euros at 30-three, star Paris, hotels.…

A:

Q: The mean weight of people living in a certain residential area has been 60 Kgs in the recent years.…

A: It is given that the mean weight of people living in a certain residential area has been 60Kg. We…

Q: A normal population has mean  =μ22  and standard deviation  =σ16 . Find the values that separate…

A: The given values are:Mean (μ) = 22Standard deviation (σ) = 16

Q: A sample of 14 forest deer mice have an average body length of x = 91.1 mm. Do forest deer mice on…

A: Given information: x¯=91.1 mmσ=8 mmμ=86 mmn=14

Q: A survey taken several years ago found that the average time a person spent reading the local daily…

A: Given data: x¯=12.2s=3n=36   As population standard deviation is not known, we will use…

Q: Suppose that a researcher is interested in the possible relationship between the amount of screen…

A: List of formulae : Test statistic : t =rn-21-r2 Where , r is correlation coefficient. r =…

Q: For samples of the specified size from the population described, find the mean and standard…

A: The following information has been given: Let X be a random variable represents the annual snowfall.…

Q: At a local store, 65 female employees were randomly selected and it was found that their mean…

A: Given information- We have given two samples- Sample 1 is for male employees- Sample size, n1 = 75…

Q: A random sample of 88 eighth grade​ students' scores on a national mathematics assessment test has…

A: Given Information: Sample size (n) = 88 Sample mean (x¯) = 283 Population standard deviation (σ) =…

Q: A recent study stated that if a person chewed gum, the average number of sticks of gum he or she…

A: Step 1: Consider that μ is the population mean number of sticks of gum a person chewed daily. That…

Q: Assume that the level of ∝=0.1 and use the given information to complete the problem. The standard…

A: Solution: The claim given in the question is that the standard deviation of pulse rates of a certain…

Q: The pH of an acid solution used to etch aluminum varies somewhat from batch to batch. In a sample of…

A: a) The null and alternative hypotheses are provided as;

Q: The mean score on a driving exam for a group of drivers education students is 68 points with a…

A:

Q: I. Hope and Elizabeth who are bestfriends took a college entrance examination. The mean score and…

A: Formula Used: X = μ + Z×σ   Solution: 1 μ = 115 σ = 12 Z-score of Hope = 1.5 X = μ + Z×σ X = 115 +…

Q: The brain volumes (cm3​) of 20 brains have a mean of 1052.4 cm3 and a standard deviation of 122.2…

A: It is given that the mean is 1,052.4 and the standard deviation is 122.2.

Q: Suppose there are two different vaccines for Covid. Vaccine X and Vaccine Y. An interesting question…

A: Solution: Given information: n1= 78 Sample size of vaccine X n2= 93 Sample size of vaccine Y x =151…

Q: The brain volumes ​(cm3​) of 20 brains have a mean of 1138.8 cm3 and a standard deviation of 128.7…

A: We are Given,the brain volumes of 20 brains have a mean of 1138.8 cm3 an standard deviation of 128.7…

Q: In a sample of 15 randomly selected high school seniors, the mean score on a standardized test was…

A: Step 1: Identify the formula for t-value (a t-distribution will be used since only the sample…

Q: The brain volumes ​(cm3​) of 50 brains vary from a low of 902 cm3 to a high of 1478 cm3. Use the…

A: Given Information:    Maximum=1478Minimum=902

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 nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…

A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…

Q: A nutritionist claims that the mean tuna consumption by a person is 3.3 pounds per year. A sample of…

A: Given,   Sample size = 70 Sample mean = 3.1 Population standard deviation = 1.14

Q: A sample of 12 measurements has a mean of 24 and a standard deviation of 2. Suppose that the sample…

A: A sample of 12 measurements has a mean of 24 and a standard deviation of 2. n=12,  x¯=24 s=2 Suppose…

Q: deviation s = 0.1. Is there sufficient evidence in the sample to suggest that the mean nicotine…

A: here given, sample mean  = 1.53 sample standard deviation  = s= 0.1 significance level = 0.01

Q: A normal population has mean  =μ22  and standard deviation  =σ16 . Find the values that separate…

A: The given values are:Mean (μ) = 22Standard deviation (σ) = 16

Q: For a given group of adults, the-coefficient of correlation between height and weight is 0.7,…

A:

Q: A random sample of 16 adult male wolves from the Canadian Northwest Territories gave an average…

A: x¯1=97, s1=6.3, n1=16x¯2=88, s2=7.1, n2=22 Let μ1 represent the population mean weight of adult male…

Q: In a certain design, it is important that standard deviation of the current be less than 21 mA. In a…

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.