You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you believe the population standard deviation is approximately o = 42.7 dollars. You would like to be 95% confident that your estimate is within 5 dollar(s) of average spending on the birthday parties. How many parents do you have to sample? n= parents

Q: Given a set of data that is skewed-left, there is at least _____ % of the data within 3 standard…

A: From the given information, Consider, As it has been given that data is left skewed as a result one…

Q: Use technology or a z-score table to answer the question. The scores on a memory test are normally…

A:

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2023 votes per district…

A: Note: Thank you for the question. Since multiple questions are posted, according to our policy, we…

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

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Class Frequency 1 - 10 34 11 - 20 23 21 - 30 18 31 - over 13 Solution: Class(1)…

Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…

A: Given that ; X represents the number of adults in groups of five who reported sleepwalking P(x) is…

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2128 votes per district…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to…

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2118 votes per district…

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we…

Q: The heights (in inches) of all 10 adult males in an office are listed below. Find the population…

A: Data given 70,72,71,70,69,73,69,68,70,71 n=10

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A:

Q: c. Find the probability that a randomly selected district had fewer than 1846 votes for President…

A: It is given that  Mean, μ = 2032 Standard deviation, σ = 591

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2082 votes per district…

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

Q: Conduct a t-test at the .01 level. You are interested in the income of American adults. In your…

A: Please see ExplanationExplanation:Given:a = 0.01n = 361x = 19500s = 3800 We need to test if the mean…

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2065 votes per district…

A: Answer: the given values are the sample size =n=40 the population mean = μ = 2065 The population…

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

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: You want to obtain a sample to estimate how much parents spend on their kid's birthday parties.…

A:

Q: A Gallup poll wants to determine the mean number of books Americans read each year. How many…

A: given, population standard deviation σ = 5.4 Margin of error (E) = 0.57 significance level (α) =…

Q: ccording to a recent survey, the salaries of assistant professors have a mean of  $40,756  and a…

A: X follows a Normal distribution with mean = 40756 and S.D = 7500 Then z=(x-mean)/SD =…

Q: Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the…

A: Solution: It is given that, Population mean, 70 Standard deviation, 5 Given that Cody took his first…

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2145 votes per district…

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

Q: The tourist bureau of Cancún surveyed a sample of 5 United States tourists as they left to return…

A: We have given that,  The sample numbers are :- 12, 8, 10, 7, 8 Then,  We will find the standard…

Q: In the diagram below, what is the value of the standard deviation? What is the mean? 4.0 4.5 5.0 5.5…

A:

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2053 votes per district…

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

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: Given,mean(μ)=$360standard deviation(σ)=$15and data value(X)=$396

Q: A successful basketball player has a height of 6 feet 4 inches, or 193 cm. Based on statistics from…

A: Here, z -score is 2.66. The z -score is Z=(X-µ)/σ

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2071 votes per district…

A:

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A:

Q: Scores on an aptitude test are normally distributed with a mean of 1000 and standard deviation of…

A: It is give that the value of mean is 1000 and standard deviation is 120. If 1,590,000 student take…

Q: What is the percentile rank for a student who scored 74 on a softball rules test if the class mean…

A:

Q: Estimate the percentage of amounts that are between $39.70 and $51.98.

A: Given Data : Population Mean,μ = 45.84 Population Standard Deviation,σ = 3.07

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2121 votes per district…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

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

A: The Chebeyshevv's inequality is stated as, for a random variable, X with finite mean, μ and…

Q: A Gallup poll wants to determine the mean number of books Americans read each year. How many…

A: The population standard deviation is .The margin of error is The level of Confidence level is .

Q: A statistics professor gives a survey to each of the 100 students in an introductory statistics…

A: Obtain the population standard deviation:

Q: According to the bookstore, 79% of students sell their used books back to the bookstore after the…

A: Givensample size (n) = 75p=0.79

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Mean: The general formula to obtain the mean of a grouped data is, Mean = (∑fm)/N The below table…

Q: random sample of 12 second-year university students enrolled in a business statistics course was…

A: Given that  Sample size n =12 Population mean =60 Population standard deviation =8 Level of…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Introduction: For a grouped data with k classes having class marks xi, class frequency fi (i = 1, 2,…

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: 1100 19 2100 20 31am individuals 30

A: Given : Age range Number of individuals 1-10 30 11-20 19 21-30 20 31-over 13

Q: Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings,…

A: SavingsFrequency$0 - $199330$200 - $39994$400 - $59947$600 - $79919$800 - $99913$1000 - $11997$1200…

Q: What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in…

A: Given, Class f 1-10 35 11-20 21 21-30 16 31 and over 8