The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days and a standard deviation of 13 days. In what range would we expect to find the middle 98% of most lengths of pregnancies? Round the answer to one decimal place. Between and days

Q: The time for degree completion was record below. Years 4 6 5 6 5 8 Calculate the standard…

A: Calculation:The number of observations on time for degree completion (years) is, n = 6. Denote xi as…

Q: frequency table for these data is shown: Time (s) Frequency Calculate the estimated mean to the…

A:

Q: A survey found that women's heights are normally distributed with mean 63.7 in and standard…

A: In a survey, Height of women follows the normal distribution with mean 63.9 in and standard…

Q: If a one-person household spends an average of $76 per week on groceries, find the maximum and…

A: Let the random variable X is the amount of money spent by one - person household. The random…

Q: The scores and their percent of the final grade for a statistics student are given. What is the…

A: The formula for the weighted mean is, Weighted mean=∑wiXi∑wi In the formula, wi is weight of ith…

Q: Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She…

A: Givensample mean(x)=10.3standard deviation(s)=2.4sample size(n)=63confidence level=99%

Q: The coefficient of variation CV describes the standard deviation as a percent of the mean. Because…

A:

Q: Recently, a random sample of 13-18 year olds was asked, "How much do you currently have in savings?"…

A: Given that  Class Frequency (f) Mid value (x) f⋅x f⋅x2 =(f⋅x)×(x) 0-199 336 99.5 33432 3326484…

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Mean(µ) = 100Standard deviations (σ) = 15X ~ N (µ, σ )= N(100, 15)

Q: Fill in the missing values in the table. Round your responses for the expected frequencies to two or…

A: To fill the missing  values.

Q: Calculate the standard deviation sales per store using this population data 91, 53, 71, 4, 30, 16

A: We have given that the population data: 91, 53, 71, 4, 30, 16.

Q: Heights for group of people normally distributed with mean = 65 inches and standard deviation = 2.8…

A: Let us denote H as the heights follows normal distribution with mean 65 and standard deviation of…

Q: (a) Determine the mean and standard deviation of each data set. The mean of the data set for bond…

A: For Bond Mutual fund  given data is  3.2,1.8,1.9,3.4,2.4,2.7,1.6,2.0

Q: The scores and their percent of the final grade for a statistics student are given. What is the…

A:

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

A:

Q: Find the mean and standard deviation for the individualized instruction scores. Scores…

A: Solution-: We find the mean and standard deviation for given frequency distribution table

Q: A city's mean minimum daily temperature in February is 27°F. Suppose the standard deviation of the…

A: Given information: Let X be the random variable that denotes the number of days with the minimum…

Q: Tign pres of adults, and res are normally distributed with a mean of 100 and a standard deviation of…

A: Population mean=100 , population standard deviation =15

Q: Scores on the verbal Graduate Record Exam​ (GRE) have a mean of 448 and a standard deviation of 113.…

A:

Q: Age of Senators The average age of senators in the108th Congress was 59  years. If the standard…

A:

Q: A statistics professor asks each of the students in an introductory statistics lecture to fill out a…

A: I have provided the answers using Excel

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days…

A: From the provided information, Mean (µ) = 260 days Standard deviation (σ) = 16 days X~N (260, 16)

Q: bidcorp auction team's weekly mean income $1000 and the standard deviation of this team is $100 the…

A: The objective of this question is to find the percentage of the auction team's members who have an…

Q: The Centers for Disease Control and Prevention recommends that adults get between 7-8 hours of sleep…

A: From the dot plot the data are 6, 6, 6, 6, 6.5, 7.5, 7.5, 7.5, 8, 8, 8

Q: The scores and their percent of the final grade for a statistics student are given. What is the…

A: Let the score is : x and corresponding weight is : wNow weighted mean score isxˉ=∑w∑xw​Now from the…

Q: At least 88.89% of the data will lie between and minutes.

A:

Q: Don't drink and drive: A highway safety council reported that there were  4012  fatalities among…

A: The midpoint of each age group is calculated by adding the lower and upper limits of the age group…

Q: John records the dates of a bunch of nickels. Determine the mean date of the nickels. final answer,…

A:

Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…

A: Let X denote the IQ scores and it follows normal distribution with  mean of μ=100 and standard…

Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

A: Given information: GSS 2014 and GSS 2018 respondents were asked their opinion on whether…

Q: The student's weighted mean score is (Simplify your answer. Round to two decimal places as needed.)

A:

Q: mean of 100 and a standard deviation of 15. Click to view page 1 of the table. Click to view page 2…

A: Given that.   X~N( μ , ?)   μ=100     , ?=15   Z-score =( x - μ )/?

Q: Find Mean and Standard Deviation (Use standard deviation formula). Data Set ((-16, 0, 16, 15, 25))

A:

Q: Don't drink and drive: A highway safety council reported that there were 3970 fatalities among…

A:

Q: Hospital Emergency Waiting Times The mean of the waiting times in an emergency room is 87 minutes…

A: We have given the waiting times in the emergency room.For additional treatment-For discharged-