1. A sample of 55 account balances of a credit card company showed a sample mean balance of $1,050. Assume that the population standard deviation is$175. At a 5% level of significance, test to determine if the population mean account balance is significantly different from $1,000. What is your conclusion? HTMI Editora

Q: What's the standard deviation for the sample data set to 2 decimal places {6.65,10.82,15.83,20.76}

A: It is an important part of statistics. It is widely used.

Q: At a large industrial plant, employees were classified according to age and given a leadership exam.…

A: Hypothesis testing is an inferential procedure of testing a claim about a population characteristic.

Q: n this scenario, what is the test statistic? A linguist believes the average age children learn a…

A: Given: n= 21.0 ,x̄= 9.2 ,s= 2.5 µ= 10.0 ,degree of freedom= 20.0

Q: find population standard deviation for given data  15,85,96,78,45,68,96,35,25,8

A:

Q: What is the standard deviation of 32, 21, 17, 38 and 6.

A:

Q: What is the mean reading? What is the standard deviation?

A: A function f(x) is said to be a probability density function if f(x) ≥ 0 and ∫f(x)dx = 1. Consider…

Q: The future Euroyen is the price of the Japanese yen as traded in the European Futures market. The…

A: Mean: Mean=Sum of the valuesNumber of values…

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: Suppose that the time required to complete a 1040R tax form is normally distributed with a mean of…

A:

Q: Since the number of samples is less than 30, shouldn't t-test be used instead

A: The distribution of weight for the hammers can be assumed to follow a Normal distribution. This…

Q: Approximately what percentage of normally distributed data values will fall within 2 standard…

A: It is known that, normal curve is a symmetric and bell shaped distribution.

Q: A consumer advocacy group is doing a large study on car rental practices. Among other things, the…

A: It is given that the mean monthly mileage of cars rented in the U.S. this year is greater than last…

Q: The effect size is a measure of the magnitude of a treatment effect in standard deviation units.…

A: Given that, The effect size is a measure of the magnitude of a treatment effect in standard…

Q: Calculate the raw score for the following -scores from a distribution with a mean of 15 and standard…

A: Given that, Mean = 15 sd = 3 The z-scores are 4.0, 2.2, -1.3, 0.46 To find the values of x for each…

Q: 4. Assume that family incomes are normally distributed with mean P30,000 and standard deviation of…

A:

Q: Assume that body temperatures of healthy adults are normally distributed with a mean of 98.2 and a…

A: From the given information X follows normal distribution with mean µ = 98.2 standard deviation σ =…

Q: What is the standard deviation of a dataset with the following values: 10, 12, 15, 18, 20?

A: Standard deviation is a measure of the amount of variation or dispersion of a set of values. A low…

Q: Many investors and financial analysts believe the Dow Jones Industrial Average (DJIA) gives a good…

A:

Q: noat question Assuming a normal curve, find the highest Z score a person could have while being in…

A: Given that  A) P(Z < a) = 32% B) P(Z < b) = 6%

Q: Assume scores on the Graduate Management Aptitude Test (GMAT) are normally distributed with a mean…

A:

Q: A study has been conducted of the airspeed of various bird species. You would like to specify the…

A:

Q: What is the formula for calculating the standard deviation of a set of n observations?

A: Introduction The standard deviation is one of the measures of variability.

Q: core: 2/10 2/7 answered • Question The heights of women have a symmetric distribution with a mean of…

A: Given information: The height of women follows Nμ=66, σ=2.

Q: 3. Hypothesis: College students sleep less than the recommended 8 hours. Sample Data: mean = 7.25,…

A: Given, Sample size = 25 Sample mean = 7.25 Sample standard deviation = 2.1   Set up the null and the…

Q: find population standard deviation  for given data 9,74,52,16,46,42,45,63,5,98,75,25,35,64

A:

Q: Statistics Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximun length 40 4.150 0.300 1.899…

A: Summary statistics of a data length of species sunfish, bass and carp is given.

Q: 4. The mean score of 100 BS Biology students on a 100-item chapter test is 92. midpoint method. What…

A: Midpoint Method  Mean = x¯=x1+x2+...+xnnwhere n - number of observationsx¯=∑fixii∑ifi Deviation…

Q: What does Chebyshev’s rule say about the percentage of observations in any data set that lie within…

A: a.We have to determine the percentage of observations in any data set that lie within six standard…

Q: Suppose the mean height of women age 20 years or older in a certain country is 62.7 inches. One…

A: For the given data Set up hypotheses

Q: Distribution of weights of 24 month old girls is somewhat normal with a mean weight 26.4 pounds and…

A:

Q: Approximately, what percentage of data lies within two standard deviations from the mean?

A: Empirical rules:1) P(μ-σ<x<μ+σ)=68%2) P(μ-2σ<x<μ+2σ)=95%3) P(μ-3σ<x<μ+2σ)=99.7%

Q: The mean IQ is 100 and the standard deviation is 15. What percentage of people fall between the IQs…

A: given  data, μ=100σ=15we have to find out the percentage of people

Q: 14) Find the score that separates the top 80% from the bottom 20% if the Mean is 100 and the…

A: Given information Mean (µ) = 100 Standard deviation (σ) = 26 The score that separates the top 80%…

Q: Score for the California Peace Officer Standards and Training test are normally distributed, with a…

A: Given X is normal Distributed with mean µ = 69.6 and standard deviation σ = 11.3 now will use…

Q: find population standard deviation of the given data  12,15,14,13,32,36,35,95,75,64,82,36,45,82

A:

Q: Find the mean absolute deviation of the data below 10,15,9,8,7,11,14,8,10,12

A:

Q: Which data set would be likely to have the larger standard deviation? Explain. * * Data set 1:…

A:

Q: National park services, a bureau of the US government responsible for park management, is interested…

A: For current year: The mean can be obtained as: Thus, the mean is 74.56. Arranging the data set into…

Q: mean 40,756 standard deviation 7000. find the proportion that are greater than 40,000.

A: Mean = 40756Standard deviation = 7000P(X > 40000) = ?