1. A survey by the National Retail Federation found that woman spend on average R146.21 on a Saturday lunch. Assume that standard deviation is R29.44. Find the percentage of woman who spend less than R160.00 on a Saturday lunch. Assume the variable is normally distributed. A. 0.69 B. 0.59 C. 0.68 D. 0.95 2. A survey by the National Retail Federation found that woman spend on average R146 on a Saturday lunch. Assume the standard deviation is R29.44. Find the percentage of woman who spend less than R190.00 on a Saturday lunch. Assume the variable is normally distributed. A. 0.88 B. 0.74 C. 0.93 D. 0.82

Q: 5. Assume that in a sample 450 term papers 47% of term papers were longer than two pages. Provide a…

A: Givensample size(n)=450sample proportion(p^)=0.47confidence level=98%

Q: The following are data regarding number of minutes to accomplish a certain task: 121, 134, 145, 212,…

A: From the provided information, The data values are as follow: 121, 134, 145, 212, 289, 306, 367,…

Q: Suppose the salary of x-ray technicians is normally distributed with a population standard deviation…

A: Given,sample size(n)=55sample mean(x¯)=$61,880population standard…

Q: 1. An investigator wanted to determine whether smoking was associated with lung cancer. The…

A: Introduction: It is required to find the odds ratio and interpret it, and also to identify the type…

Q: What type of data is used with the continuous uniform distribution when generating random…

A: Let X follows uniform distribution with range a to b. X~ U(a,b)

Q: For the following set of scores: 30 69 41 51 36 53 60 24 55 44 61 25 74 63 55 13 42 56 54 49 a. I…

A: The given scores are 30, 69, 41, 51, 36, 53, 60, 24, 55, 44, 61, 25, 74, 63, 55, 13, 42, 56, 54, 49.

Q: Test the claim that the proportion of people who own cats is larger than 70% at the 0.01…

A: given data claim :p>0.70α=0.01n=400p^ =0.73we have to complete the hypothesis testing for the…

Q: The process x(t) is WSS and normal with E{x(t)} = 0 and R(T)=4e-²²1, (a) Find P(x(1) ≤ 3}. (b) Find…

A: Please find the explanation below. Thank you.

Q: The following are data regarding number of minutes to accomplish a certain task: 121, 134, 145, 212,…

A: n = 9 x x2 121 14641 134 17956 145 21025 212 44944 289 83521 306 93636 367 134689…

Q: 9.57 Refer to Exercise 9.18. Is the estimator of o² given there an MVUE of o²?

A: As per the Bartleby guildlines we have to solve first question as asked by student.... Given that

Q: Under the normal curve, approximately what percent of scores fall between -2 to -3 standard…

A: The mean and standard deviation of the standard normal distribution are 0 and 1, respectively.

Q: (b) It has been claimed that 9 out of 10 doctors recommend aspirin for their patients with Is this…

A: From given data we have : n=9858 x=8236 so, p^=xn=82369858=0.835464 here P=910=0.9

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

A: given data  normal distribution  μ= 100σ = 15 P(106<x<122) = ?

Q: 4:31 K Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2600…

A:

Q: a 95% confidence interval to estimate the size effect of the population mean difference

A: d¯ = 7sd = 6n = 9 Confidence Interval to estimate the difference in Related population…

Q: The duration of flights between two locations is normally distributed with a mean of 6 hours and a…

A: GivenMean(μ)=6 hoursstandard deviation(σ)=45 minutesσ=4560=0.75 hours

Q: less than 0.62 at the a-.10 level of significance. x e following X + tleby.com/questions-a... Q✰ □:…

A:

Q: On Monday, Philip rejected a null hypothesis that was true. On Tuesday, he retained a true null…

A: Type 1 error may be defined as the reject null hypothesis when null hypothesis is true.

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: given data σ= 52.299% ci for μ.  E = 2.5n = ?

Q: Calculate the mean speed in miles per hour attained between zero (0) and seven (7) for this…

A:

Q: Suppose these data show the number of gallons of gasoline sold by a gasoline distributor in…

A: Given the data shows the number of gallons of gasoline sold by a gasoline distributor in Bennington,…

Q: 95% confidence interval: Incorrect

A: It is given that  Sample size, n = 1502 Favourable cases, X = 1081 Confidence level = 95%

Q: Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. Ho:…

A: It is given that  H0: p = 0.5 H1: p > 0.5 n = 250 x = 145 α = 0.1

Q: 6. Calculate the possible sandwich combinations if you can choose one item from each of the four…

A: Introduction: It is required to find the number of possible sandwich combinations that can be formed…

Q: 14. We investigate if a period of time feels longer or shorter when people are bored compared to…

A: Given Since, the notations are not clear but each notation is understandable, so, the notations have…

Q: The concentration of carbon dioxide (COy) in the atmosphere is increasing rapidly due to our use of…

A: Given information: Pair Control Plot Treated plot Treated plot-Control Plot 1 9.752 10.587…

Q: Thank you for your response! that was helpful.  I thought the research scenario was imlying a…

A: Weight Height 45 152.4 54.4 157.5 60 130 68 177.8 63.5 198.1 86 177.8 59 143.3 61.2…

Q: The average final exam score for the statistics course is 82%. A professor wants to see if the…

A: a. Suppose μ is the population mean final exam score for students who are given colored pens at the…

Q: Scenario: If 20 participants completed an attention task twice — once after consuming a sugar pill…

A: Descriptive research design involves collection of data that describes events and then classifies,…

Q: 1 Part: 0/2 Part 1 of 2 Continue = 2 Part: 1/2 Let's go to the movies: A random sample of 42…

A: Here, mean is 110.2 standard deviation is 12.3. Sample is 42. We will use one sample z confidence…

Q: 2. Do athletes in different sports vary in terms of intelligence? Below are reported College Board…

A: Followings are the Explanation of the question  Use the excel and calculate the Sample mean and…

Q: Suppose it is known that among all people who went trick-or-treating, 37.3% also visited a haunted…

A: Given information: The percentage of the people who visited a haunted attraction is 37.3%. The…

Q: Do you want to own your own candy store? Wow! With some interest in running your own business and a…

A: The sample mean is 107.1 and the sample standard deviation is 30.7.

Q: se technology to find the​ P-value for the hypothesis test described below. The claim is that for 12…

A: given data, claim :μ>98.6n=8df=n-1=8-1=7t=1.349p-value =?

Q: *9.52 Let Y₁, ₂,..., Y, be a random sample from a population with density function 3y² f(y|0) = 8³…

A:

Q: Park officials make predictions of times to the next eruption of a particular​ geyser, and collect…

A: we have to identify null and alternative hypothesis, test statistic, p value and conclusion of test.…

Q: Prove if X~ N (1₁0) for M being any real number upe &o is greater than Zero, then Z= = (X-M)…

A: Given X~Nμ, σ, μ being any real number and σ is greater than zero.

Q: 1. Let X be a continuous random variable with cdf 0, x≤0 x² F(x)= = 7,0 ≤ x 1.5). b. Derive the pdf…

A:

Q: 1. Match Column A with Column B by connecting a line between them (nainen Factorial Combination A…

A: Permutation is the arrangement of data in the orderly way. It arrange the n distinct object in the r…

Q: ust do last thre parts

A: Given data: Patient X Y Z A 1 2 3 B 1 2 3 C 1 2 3 D 1 3 2 E 1 2 3 F 1 3 2 G 2 1 3…

Q: A company producing steel nails receives an order for 5000 nails of length 50 mm. Due to external…

A: We have given that A company producing steel nails receives an order for 5000 nails of length 50 mm…

Q: Answer 4 & 5 only, provide the sampling technique, justification and t

A: Hello! Thank you for your query. Because RRLs fall under the subjective category, we are only…

Q: Part III. Weighted mean. Use the data on Job Satisfaction compute the Grand mean for each Facets…

A: Let xi represents the ith data value and let wi represents the weight corresponding to the ith…

Q: The file High Desert Banking contains information regarding consumer, real estate, and small…

A: Given the file High Desert Banking contains information regarding consumer, real estate, and small…

Q: Consumer Research, Inc., is an independent agency that conducts research on consumer attitudes and…

A: Since you have posted a question with multiple subparts, we will solve first three subparts for you.…

Q: 2. Do athletes in different sports vary in terms of intelligence? Below are reported College Board…

A: In statistical inference, there are two ways of drawing an inference. These are test of significance…

Q: K- A poll was conducted to investigate opinions about global warming. The respondents who answered…

A: It is needed to test the claim that whether the sex of the respondent is independent of the choice…

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: State the least squares criterion,

A: Answer- By minimising the sum of squares produced by a mathmatical function, the least square…

Q: 2. Data Set "Speed Dating" includes "attractive" ratings of male dates made by the female dates. The…

A: