A random sample of daily high temperatures in January and February are listed. At an alpha equal to 0.05, can it be concluded that there is a difference in variances in high temperatures between the two months. Jan data us 31,31, 38, 24,24,42,22,43,35. Feb data is 31,29,24,30,28,24,27,34 What is the standard deviation?

Q: Heights of men in America are usually a mean of 69.1 inches, with an SD of 2.67 inches. Women are…

A: Z score is given by,

Q: The ages of the members of a popular ski club is normally distributed with a mean of 46 years and a…

A: Given that the ages of the members of a popular ski club is normally distributed with a mean of 46…

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: The studernt scored the same on both tests. O B. The student scored better on the mathematics test.…

A: Given : For geography test student score, x = 68.0 population mean, μ = 80.0…

Q: An educational study to be conducted requires a test score in the middle 40% range. If the mean is…

A: Let us assume X=score Given that X follows a normal distribution with mean= 100 and standard…

Q: Scores by women on the SAT-1 test are normally distributed with a mean of 988 and a standard…

A: Given Information Now we have to calculate corresponding Z value                         Z = 0.7388…

Q: The lengths of trout in a lake are normally distributed with a mean of 30 inches and a standard…

A: The z-score denotes how many standard deviations an individual raw score is away from the mean The…

Q: Hypothesis Tests - 2 samples x C Solved: One of the questions b Answered: The mean numbero x P…

A: Answer:- The independent t-test implies that the means of the two independent populations are…

Q: Two different species of trees have heights that are approximately normal in distribution.  Tree 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: The mean number of English courses taken in a two-year time period by male and female college…

A: Answer:-

Q: An article in a professional journal reports the z­-score for the study’s sample mean was z = –1.4.…

A: From the provided information,z = -1.4Sample mean (x̄) = 97Sample size (n) = 49Population mean (µ) =…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 104.6 and a standard…

A:

Q: A test score of 45 has an equivalent standard score (z-score) of 1.6. If the mean test score is 39,…

A: given dataraw score  x = 45standard score   z = 1.6mean μ = 39S.D.  σ = ?

Q: The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is…

A:

Q: The applet displays a scatterplot with the following points:…

A: The given points are (7,10), (27,35), (24,25), (8,12), (10,19), (15,22).

Q: The gestation period for human births can be taken as normally distributed with a mean of 266 days…

A: Given:

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Here we will conduct a 2 independent sample t-test to test the equality of the average number of…

Q: It has been reported that the standard deviation of the speeds of drivers on interstate -35 near…

A: It has been reported that the standard deviation of the speeds of drivers is 6.8 miles per hour for…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 454 and a standard…

A:

Q: Scores on a test have a mean of 8181 and a standard deviation of 1313. Michael has a score of 9393.…

A:

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Given:

Q: Suppose a researcher wants to know if the average diastolic blood pressure in Irish-Americans is…

A: Solution

Q: If research samples 28 college students and wants to compare the sample mean of 8 to the population…

A: From the provided information, Sample size (n) = 28 Sample mean (x̄) = 8 Population mean (µ) = 12…

Q: A bank loan officer rates applicants for credit. The ratings can be described by a normal model with…

A: Given: μ = ​200 σ = 50

Q: Assume a test in biology is normally distributed with a mean of 80 and a standard deviation of 5.…

A:

Q: The mean number of English courses taken in a two-year time period by male and female college…

A: Given: Sample size of males, n1 = 29 Sample size of females, n2 = 16 Standard deviation for males,…

Q: Suppose the heights of women at a college are approximately Normally distributed with a mean of 65…

A: The objective of this question is to find the height that corresponds to the 40th percentile in a…

Q: Assume that adults have iq scores that are normally distributed with a mean of 98.2 and a standard…

A:

Q: Calculate z scores from two samples "he tallest living man at one time had a height of 252 cm. The…

A: Given data,Mean is μ=170.25sd is     σ=8.47

Q: Suppose the scores of students on an exam are normally distributed with a mean of 253 and a standard…

A: From the provided information, Mean (µ) = 253 Standard deviation (σ) = 80

Q: Assume that adults have IQ scores that are normally distributed with a mean of 103.1 and a standard…

A: According to the given information in this questionWe need to find first quartile

Q: A simple random sample of 36 observations was taken from a large population. The sample mean and the…

A:

Q: The hotel room rate in Miami, Florida is normally distributed with a mean of $286 per night. Assume…

A: