Grace Floral Shop claims that their average daily earnings is $497. An auditor wants to determine whether this claim is true. The auditor randomly selected a sample of 100 days and found that the sample mean earnings was $495 with a sample standard deviation of 9.75. a) Calculate the 97% confidence interval for the population mean daily earning.  Assist the auditor in conducting a hypothesis test, at the 3% level of significance, to determine whether the claim about their average daily earnings was overstated. b) State the null and the alternative hypothesis for this test.  c) Using the p-value approach, state the decision rule for this test.  d) Calculate the value of the test statistic for this test.  e) Calculate the p-value for this test?  f) State the conclusion of this test. Give reason for your answer.

Q: In a survey, 31 people were asked how much they spent on their child's last birthday gift. The…

A: Sample size, n = 31Mean = 48Standard deviation = 8

Q: 2. A study of recent graduates from your school reveals that for a accounting majors the mean salary…

A: Given that  Sample sizes n1=20 , n2=18 Sample mean s x1=30000 , x2=29000 s1=2000 , s2=1500

Q: An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city…

A:

Q: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The…

A: We have to find margin of error

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: Given The value of n is 18. The value of s is 18. The value of x=39. The confidence level is 90%.

Q: In a survey, 26 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: a. Report the point estimate for this study of student loans owed. b. Construct a 95% confidence…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: In a survey, 26 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a survey, 31 people were asked how much they spent on their child's last birthday gift. The…

A: Given: σ = $ 2  n = 31

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A: Here,  Total number of samples , n = 17 Mean, µ = 41 Standard Deviation, σ = 4 Confidence level =…

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: Given  The results were roughly bell-shaped with a mean of $37 and standard deviation of $3 Sample…

Q: An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city…

A: Given, Sample size = 719 Sample mean = 23.7 Population standard deviation = 9.7   Since the…

Q: A marketing researcher wants to estimate the mean savings ($) realized by shoppers who showroom.…

A: Sample size Sample mean Sample standard deviation

Q: In a survey, 15 people were asked how much they spent on their child's last birthday gift. The…

A: Solution: From the given information, S=2 and n=15. The confidence level is 0.98.

Q: You are interested in estimating the the mean weight of the local adult population of female…

A:

Q: In a survey, 16 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: A publishing company has just published a new college book. The research department at the company…

A: A one sample t test is used to compare the sample mean with a hypothesized value. when population…

Q: #6. In a survey, 10 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The…

A: The summary of statistics is,

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: . A sample of 84 WCC students found mean age 24.7 years old with standard deviation 7.9 years old.…

A:

Q: In order to answer the question, "Is air pollution worse in Washington or Baltimore?", what kind of…

A: Whenever you're deciding which statistical procedure to follow keep the concept of dependent and…

Q: A local power utility claims that the mean annual household electric bill for its subscribers is…

A:

Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: In a survey, 27 people were asked how much they spent on their child's last birthday gift. The…

A: The mean is $36 and the standard deviation is $6.

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A: Given that: Sample size=n=17 Sample mean=x¯=41Standard deviation=s=999% confidence level, i.e,…

Q: a survey, 27 people were asked how much they spent on their child's last birthday gift. The results…

A: Given: Sample size=n=27Mean=x¯=31Sample standard deviation=s=8α=0.01

Q: You are interested in estimating the the mean weight of the local adult population of female…

A:

Q: If the mean flying time for a sample of 65 pilots was 15.6 hours per month, and the population…

A:

Q: The Department of Early Learning sets rules for childcare in Washington State. They are interested…

A: Solution: From the given information, confidence level is 0.95, σ=$1.40 and E=$0.50.

Q: Market research indicates that a new product has the potential to make the company an additional…

A: It is given that,Sample mean = $3.8 million.Sample standard deviation, s is $1.8 million.The sample…

Q: In a survey, 35 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data…

A: The given information is about the 35 annual earnings of the randomly selected microbiologists.

Q: a. b. Find the best point estimate of the population mean. Construct and interpret the 85%…

A: here given ,  sample size  = n= 20  sample mean = $48.60 sample standard deviation  = $3.53  here…

Q: Students who graduated from college in 2010 owed an average of $25,000 in student loans. An…

A: We have given that  Sample size n  = 40 Sample mean = 27500 Population standard deviation = 9120

Q: In a survey, 16 people were asked how much they spent on their child's last birthday gift. The…

A: The summary of statistics is, x¯=38,s=6,n=16 The degree of freedom is, df=n-1    =16-1    =15…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.