Claim: Fewer than 91% of adults have a cell phone. In a reputable poll of 1135 adults, 83% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)

Q: At the 0.05 significance level, test the claim for the modified components, the mean time, between…

A: The hypothesized mean is 14 oz.

Q: istributed. Use the P-value method with tables. of 5 he hypotheses and identify the claim. = 24 not…

A: Given N=27 Xbar=22.2 Standard deviation=3.7

Q: The data to the right represent the number of chocolate chips per cookie in a random sample of a…

A: We use excel to find boxplots

Q: The data in Figure 2 below has to do with the stocks of three of South Africa's biggest mobile…

A: Solution: From the given information,

Q: Q₁: If X₁, X2, X₁ are random sample such that f(x;) = 0xº, 0<x< 1, then find the method of moment…

A:

Q: The table below shows the number of state-registered automatic weapons and the murder rate for…

A: The given regression equation is: y=0.83x+4.08.

Q: Let x = (x₁,...,xn) be a data set, and denote its sample standard deviation with sx. Let y₁ = ax; +…

A:

Q: c) Suppose that the results of carrying out the hypothesis test lead to non-rejection of the null…

A: Given Information: The null and alternative hypotheses are: H0:θ-0.90H1:θ=0.60 Consider Y as the…

Q: The maximum acceptable level of a certain toxic chemical in vegetables has been set at 0.4 parts per…

A: Suppose μ is the population mean level of the chemical in tomatoes from the producer.

Q: Fill in the missing values for this ANOVA summary table: S.S. d.f. Between Within TOTAL 1267.84 7…

A: ANOVA is used to test the significance difference between more than two means. The test statistic is…

Q: 23. The numbers of tourists (in thousands) visiting Table Mountain in Cape Town per quarter, for…

A: Given data is

Q: "This year s statistics class was small (only 15 students). This group averaged 74.5 on the final…

A: Suppose µ is the true population mean scores in the final exam of all statistics students.

Q: The life in hours of a battery is known to be approximately normally distributed, with standard…

A:

Q: Question 2 Concrete placed on a structure was subsequently cored after 28 days, and the following…

A: In hypothesis testing, there are always two hypotheses - null and alternative. These two hypotheses…

Q: What sample size is needed to give a margin of error of 4% with a 95% confidence interval? (Give…

A: From the provided information, Margin of error (E) = 4% = 0.04 Confidence level = 95%

Q: Data show that men between the ages of 20 and 29 in a general population have a mean height of 69.3​…

A: The formula for finding mean is shown below:

Q: • Two dice are rolled. What is the probability of getting a sum equals 10? Probability = (Round to 4…

A: GivenTwo dice are rolled

Q: Education professionals refer to science, technology, engineering and mathematics a STEM…

A: Given n=85 P=0.47

Q: Calculate approximately to 3 decimal places the composite quantity index for all three stocks for…

A: Consider the following table: Stock Price p0 Qty q0 Price p1 Qty q1 p0q0 p0q1 p1q0…

Q: i) Show that the standard score of the sample mean X, is equal to Y. ii) Show that the mean and…

A: It is given that  X follows N(θ, 1), then E(X) = θ and V(X) = 1, And the moment genarating function…

Q: You are playing a card came, and the probability that you will win a game is p If you play the game…

A: given data p = 0.31n = 723x = no. of wins binomial distribution

Q: If you wanted to make $708 by investing $7345 for 6 years in an account that pays simple interest,…

A:

Q: In a random sample of 678 adult males 20 to 34 years of age, it was determined that 58 of them have…

A:

Q: 88 90 70 53 51 19 94 32 70 74 80 24 88 68 Send data to calculator 66 53 65 69 54 68 61 Send data to…

A: Box plot is used to measure the shape of the distribution. It also used to measure the outlier exist…

Q: An academic Professor conducted a research aimed at exploring the experience and challenges faced by…

A: Test is that whether the mean age of all people diagnosis with initial occurrence of dementia is…

Q: A statistics instructor randomly selected four bags of oranges, each bag labeled 10 pounds, and…

A: Given data is10.3,10.8,10.4,10.6sample size(n)=4

Q: According to a survey in a country, 28% of adults do not own a credit card. Suppose a simple random…

A: Given,p=0.28n=400Mean(μp^)=p=0.28Standard deviation(σp^)=p(1-p)nStandard…

Q: A person's blood glucose level and diabetes are closely related. Let x be a random variable measured…

A: GivenMean(μ)=86standard deviation(σ)=23

Q: () The drawer still contains 40 socks - 20 blue, 10 purple and 10 green socks. Let's assume that we…

A: Given; Total number of socks in drawer = 40 socks40 socks = 20 bluem 10 purple and 10 green socks

Q: You wish to test the following claim (H) at a significance level of a = 0.002. For the context of…

A: It has been believed that the population of difference scores is normally distributed.

Q: Test the given claim. Assume that a simple random sample is selected from a normally distributed…

A: a.   Suppose σ is the true standard deviation of the errors of the new production method.

Q: 9% of all Americans live in poverty. If 38 Americans are randomly selected, find the probability…

A: It is given that  Probability of success, p = 9% = 0.09 Sample size, n = 38 X ~ Bin( 38, 0.09 ) The…

Q: A regression was run to determine if there is a relationship between hours of TV watched per day…

A: Let the independent variable X be the no.of hours of TV watched per day Let the dependent variable Y…

Q: According to a recent article about individuals who have credit cards, the mean number of cards per…

A: It is given that the mean number of cards per individual is less than 4.

Q: 11:17 The following data represent the dividend yields (in percent) of a random sample of 28…

A: Given data…

Q: The Bureau of Labor Statistics reported that 16% of U.S. non-farm workers are government employees.…

A: Given n=65 P=0.16

Q: b) Suppose that a random variable X has a probability density function given as (2(ß-x) 0 < x <B B²…

A:

Q: Match the regression equation with the appropriate graph. (Note that the x- and y- axes are broken.)…

A: given regression equation is  y^ = 1.72x +84.99

Q: A teacher categorized students by whether they regularly completed their homework (or not) and…

A: The probability that a student passed the course is, Ppassed=3256              =0.5714…

Q: Let X₁, X2, X3,..., Xn denote a random sample of size n from the population distributed with the…

A:

Q: You are testing the claim that having lights on at night increases weight gain (abstract). A sample…

A: Solution: First we find sample means and standard deviation.  x1=∑x1n1=67.3210=6.732…

Q: Today, the waves are crashing onto the beach every 5 seconds. The times from when a person arrives…

A: GivenA random variable x~Uniform(0,5)f(x)=1b-1    ; a&lt;x&lt;bf(x)=15-0 ; 0&lt;x&lt;5f(x)=15   ;…

Q: Records over the past year show that 1 out of 385 loans made by Mammon Bank have defaulted. Find the…

A: Formula Used: The Poisson distribution: X~P(λ) P(X = x) = e-λλxx!

Q: Suppose a mutual fund qualifies as having moderate risk if the standard deviation of its monthly…

A: The population standard deviation is 4 and sample standard deviation is 3.48. The sample size is 26.

Q: A consumer products company is formulating a new shampoo and is interested in foam height (in…

A: given data H0 : μ = 175H1 : μ &gt; 175σ = 20n = 10x¯ = 190Z = ?

Q: company is comparing methods for producing pipes and wants to choose the method with the least…

A: Solution: First we find sample means and standard deviation for method 1 and 2.  n=12 Sample size of…

Q: Quick Start Company makes 12-volt car batteries. After many years of product testing, the company…

A:

Q: STOCK MTN Vodacom Cell C PRICE Po 2008 285 155 110 QTY q⁰ 2008 370 320 700 PRICE P₁ 2011 215 120 90…

A: Composite price index is given by,  P = ΣP1i/ΣP0i

Q: If X~N(2,9), compute a. P(X>=2) b. P(1<=X<7) c. P(-2.5<=X<=-1)

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

Q: usic students played a short song, and the number of mistakes in music each student made was…

A: