You may need to use the appropriate appendix table or technology to answer this question. Studies show that massage therapy has a variety of health benefits and it is not too expensive. A sample of 14 typical one-hour massage therapy sessions showed an average charge of $54. The population standard deviation for a one-hour session is ? = $7.5.

Q: You are conducting an experiment to examine the anxiety levels of a group of Psychology students.…

A:

Q: At McMeck High School they decided to calculate the average GPA of all 950 students.  The average…

A:

Q: You are estimating the mean size of farms in New Hampshire.  You want your 95% CI to have a margin…

A: The formula for the sample size is as follows:

Q: The annual salaries for workers at a local mill are normally distributed with a mean of $45,000 and…

A: The annual salaries for workers at a local mill are normally distributed with a mean of $45,000 and…

Q: The margin of error is 6, with a sample standard deviation of 20 and 92% level of confidence. Step…

A: As the population mean is estimated on the basis of sample mean, there must be some error in…

Q: A market researcher wants to estimate the amount of money that a Christmas shopper will spend on…

A: We have to find sample size for given data..

Q: The median score on a test was 80% with a standard deviation of 5%, what does that tell you about…

A: Central tendency is used to determine the average of the data set. Dispersion is used to determine…

Q: Let C be a smooth curve in R³, let S be a smooth surface in R³. Assume that f(x, y, z) is a scalar-…

A:

Q: Tom scored a 125 on a measure of math ability and a 42 on a measure of verbal ability.The means and…

A:

Q: Given that the mean of a set of data is 40 and the standard deviation is 2, what is the coefficient…

A: Given,standard deviation(σ)=2mean(μ)=40

Q: parent would spend on their child's birthday gift (use a 99% confidence level). Give your answers to…

A:

Q: There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on…

A: From the provided information, For ACT score: Mean (µ) = 21.5 Standard deviation (σ) = 5.4 For SAT…

Q: 4. An airline claims that the average number of years of experience of its pilots is at least 18.3.…

A: Given data  Population mean μ=18.3, n=sample size=20, sample mean x̄=17.4, s=3, level of…

Q: You are interested in determining the mean amount of dollars that employees at your company spend on…

A: Solution: From the given information, confidence level is 0.90, σ=1 and E=300.

Q: you want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Population standard deviation =56.3Margin of error =E =1

Q: A standardized test has a pop. mean of 152 and a standard deviation of 16. Molly scores at the 91st…

A:

Q: Heights of women can be modeled by a normal model with a mean of 63.6 inches and a standard…

A: Mean()=63.6standard deviation()=2.5The Beanstalk Club, a club for tall people, has a requirement…

Q: Consider a value to be significantly low if its z score less than or equal to -2 or consider a value…

A: Here, mean is 19.5 and standard deviation is 4.6.

Q: In an area when customers face technical difficulty with their Internet cable hookup may call an 800…

A: Given: a=30 secondsb=10 minutes

Q: It has been reported that the average debt for college seniors is $4262. The student senate at a…

A:

Q: You may need to use the appropriate appendix table or technology to answer this question. A…

A: Male consumer Sample size, n1=40 Sample mean, x¯1=132.67 Population sd, σ1=45   Female consumer…

Q: A market researcher wants to estimate the amount of money that a Christmass hopper will spend on…

A:

Q: You want to estimate the mean number of friends for all Facebook users. How many users must be in…

A: Given data :  95% CI Standard deviation = 53 E = 7

Q: The standard deviation on your last test was 10. The average was a 70. The distribution had a normal…

A: To find out what percentage of the class scored between 60 and 80, we need to utilize the properties…

Q: You work for a consumer advocate agency and want to estimate the population mean cost of replacing a…

A: According to bartleby expert guidelines we can answer only first three subparts. Rest can be repost.

Q: he scores on a psychology exam were normally distributed with a mean of 65 and a standard deviation…

A: Given,μ=65σ=6

Q: Consider a test of coordination that has a normal distribution, a mean of 50, and a standard…

A: given data   normal distribution   μ = 50σ = 5

Q: The mean value of land and buildings per acre from a sample of properties is $11,800, with a…

A: The objective of this question is to find the range of values within which approximately 99.7% of…

Q: Suppose that prices of a gallon of milk at various stores in one town have a mean of $3.60 with a…

A: Here is the explanation is as follows; Given that prices of a gallon of milk at various stores in…

Q: You may need to use the appropriate appendix table or technology to answer this question. A…

A: From the information, given that The formula for two sample Z-test confidence interval is,

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A:

Q: in how you determined your findings. How many children scored lower than Emily? How many children…

A: The standard normal variate of the normal distribution is continuous and follows that z~N(0,1). The…

Q: In this exercise, you will compare Chebyshev’s rule and the empirical rule. a. Compare the estimates…

A: a)The Chebyshev’s rule estimates at least 75% of observations lie within two standard deviations of…

Q: A quantitative data set has a size of 50. At least how many observations lie within seven standard…

A: Suppose X is a random variable with expectation, μ and standard deviation, σ. Then, for any positive…

Q: You are conducting a study to see how much high school students spend on back to school shopping.…

A: Solution: From the given information, confidence level is 0.90, σ=60.7 and E=1.

Q: 3. A taxi company claims that its drivers have an average of at least 12.4 years' experience. In a…

A: Givensample size(n)=15Mean(x)=11.2standard deviation(s)=2α=0.10