Statistics Question

Q: the random variable x represents the number of computers that families ha e along with the correspon...

A: Mean E[x] = ∑xP(x)

Q: Using the information from above, with p′=0.595, q′=0.405, and n=420, what is the 90% confidence int...

A: Obtain the 90% confidence interval for the proportion of the population who subscribe to cable TV. T...

Q: section9.2  42a. True or false: If P = 0.08, then a. The result is statistically significant...

A: From the provided information, The p value is 0.08. The level of significance (α) = 0.05

Q: The average weight of 35 randomly compact automobiles was 2680. The sample standard deviation was 40...

A: From the provided information, Sample size (n) = 35 Sample mean (x̅) = 2680 Sample standard deviatio...

Q: In April 2013, President Obama’s approval rating was 52%. Suppose the White House staff was concerne...

A: Given: Sample size, n = 300            Number of approvals in the sample, X = 144           Sample p...

Q: Consider the discrete random variable X given in the table below. Calculate the mean, variance, and ...

A: Solution: Let X be the discrete random variable having probability distribution is X 6 7 10 12 15...

Q: The accompanying data on x = head circumference z score (a comparison score with peers of the same a...

A: Given information: Cerebral GreyMatter (ml) 2-5 yr (X) Head Circumference z scores at6-14 Months...

Q: Starting salaries   Average salaries South Dakota 26,111 South Dakota 34,709 North Dakot...

A: Range = Maximum observation-minimum observation Here maximum observation = 31298 Minimum Observation...

Q: A sample has a mean of M = 80 and a standard deviation of s = 10. For this sample, find the X value ...

A: Given: The sample mean is M=80. The standard deviation is s=10. The z score is calculated as:       ...

Q: What is the probability that it takes 11 rolls to get your first “5” when rolling a fair 6-sided die

A: Given information: It takes 11 rolls to get your first “5” when rolling a fair 6-sided die. Probabil...

Q: Let X have probability mass function f(x)=x/6, x=1,2,3. Find E(Y) when Y=X2

A: For a discrete random variable X   E(X) = ∑xX f(x)E(X2) = ∑xX2 f(x)   Here, Let X have a probability...

Q: Using your calculator, find the range and standard deviation, round to two decimals places: The tabl...

A: Given information- We have given the table which shows the number of hours spent watching TV last we...

Q: Ten percent of all people are left handed.  Thus the probability that both a mother and her daughter...

A: Given information: Percentage of all people who are left-handed = 10% or 0.10 It is required to dete...

Q: If the test value for the difference between the means of two large samples is  1.43 then the critic...

A: Given: The test value for the difference between the means of two large samples is  1.43. The critic...

Q: Historical data indicates that only 35% of cable customers are willing to switch companies. If a bin...

A:

Q: Question 1: The incomes of all families in a particular suburb can be represented by a continuous ra...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a ti...

Q: The table below shows the voter preference and the education level of 700 voters.   < High ...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a...

Q: The χ2 critical value for n = 16 and  a=0.01 for a left-tailed test is 5.812.

A: Given that, n = 16 a = 0.01 Left tailed test.

Q: Question 1

A: Given: The three graphs given is shown below

Q: 1.26 High school tobacco use. Despite the intense anti-smoking campaigns sponsored by both federal a...

A: Given information: a)  Construct a bar chart for use of any tobacco product using the given informat...

Q: Statistics Question

A: The OR rule :  Sometimes we want to know the probability of getting one result or another. The OR r...

Q: From the fixed base index numbers given below, prepare chain base index numbers taking 1990 as base ...

A: We know that,  Current Fixed Indices= Previous fixed index*Current Chain base index/100 So current C...

Q: (a) Construct a relative frequency distribution of the data. Relative Response Frequency Never 0.118...

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

Q: The number of interal disk drives (in million) made at a plant in Taiwan during the past 5 years fol...

A: Given: n=5  

Q: The boxplot below shows salaries for Construction workers and Teachers. Construction Teacher T 20 25...

A:

Q: The geometric distribution gives the probability that the first success occurs at the xth trial with...

A: The probability mass function of geometric distribution is, P(X=x) = p × qx      ; x = 0,1,2, ---;  ...

Q: Data on the number of deaths from the COVID-19 Pandemic are recorded in two different counties in Ar...

A: Given information: Significance level α=0.01 The number of deaths from the COVID-19 pandemic of Pina...

Q: The ages (in years) and heights (in inches) of all pitchers for a baseball team are listed. Find the...

A: The coefficient of variation is given as, C.V=100*σx¯Where, σ is the standard deviation given asSD(σ...

Q: If a normally distributed group of test scores have a mean of 70 and a standard deviation of 12, fin...

A: Given information- Population Mean µ = 70 Standard deviation (σ) = 12 We have to find the percentage...

Q: We want to conduct a hypothesis test of the claim that for middle-aged adults the population mean of...

A: The following information is available in the question x¯=194.8s=18.5 The hypothesis can be formed a...

Q: Find the critical value zα/2 needed to construct a(n) 79% confidence interval.

A:   Given, (1-α)100% = 79%  (1-α)= 0.79 α = 0.21, α2 = 0.105

Q: Consider the following time series:   Quarter Year 1 Year 2 Year 3 1 66 63 57 2 48 40 50 3 ...

A: Given data, Enter data as follows Q1 Q2 Q3 Value 1 0 0 66 0 1 0 48 0 0 1 59 0 0 0 73 1...

Q: What is the mean of this data set? What is the median of this data set? What is the maximum of this ...

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-pa...

Q: Many people play a dice game in which 5 regular 6-sided dice are rolled. a. What is the probability ...

A: Given, Many people play a dice game in which 5 regular 6-sided dice are rolled. Number of sample spa...

Q: Find X2left and X2right for a 90% confidence interval using the chi-square distribution with 15 degr...

A: We have given that Df= degrees of freedom = 15 alpha = 1 -0.90 = 0.1 alpha/2 = 0.1/2 =0.05 And 1-alp...

Q: Using the information from above, with p′=0.595, q′=0.405, and n=420, what is the 90% confidence int...

A: Given that,  p^=0.595,q^=0.405,n=420 Critical values: Using the z-table, the critical value at 10% l...