The times that college students spend studying per week have a distribution skewed to the left with a mean of 8.7 hours and a standard deviation of 2.2 hours. Find the probability that the mean time spent studying per week for a random sample of 55 college students would be a. between 8.3 and 8.8 hours. Round your answer to two decimal places. P = i b. less than 8.5 hours. Round your answer to two decimal places. P = i

Q: Assume that human body temperatures are normally distributed with a mean of 98.22°F and a standard d...

A: (a) The percentage of normal and healthy persons would be considered to have a fever is P(X>100.6...

Q: Use the given data to find the minimum sample size required to estimate the population proportion.  ...

A: Find z-critical value: https://drive.google.com/file/d/1S_b_En4yZMZPhsaGfBA2eE_M0IJFOVeW/view?...

Q: a clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older su...

A:

Q: Trials in an experiment with a polygraph include 98 results that include 24 cases of wrong results a...

A: The hypotheses are given below: Null hypothesis: H0: p=0.80. Alternative hypothesis: H1:p<0.80. S...

Q: You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperature...

A: Given observation and calculation

Q: Suppose that an airline uses a seat width of 16.9 in. Assume men have hip breadths that are normally...

A: Given : μ =14.4 σ = 0.9 a) P(X>16.9) =PX-μσ>16.9-14.40.9 P(X>16.9) =Pz>2.78 P(X>16.9)...

Q: Assume a significance level of a = 0.05 and use the given information to complete parts (a) and (b) ...

A: Solution: a. The given claim is that the more than 55% of adults would erase all of their personal i...

Q: Studies have suggested that alcohol abuse and disorders are found to be more prevalent during early ...

A: a)   Denote p1, p2 as the true population proportions of young adults who have consumed alcohol and ...

Q: According to a Yale program on climate change communication survey, 71% of Americans think global wa...

A: (a) The binomial probability distribution is, PX=x=nxpx1-pn-x In the formula, n denotes the number o...

Q: Let’s assume that the “prevalence” (i.e., the proportion of infected people) of COVID-19 in a partic...

A: The prevalence rate is 5%, that is the probability that the person has COVID-19 is 0.05. Also, the t...

Q: Why does the graph on the right have a higher standard deviation? 1 2 3 4 5 6 7 1 2 3 4 5 6 7 What i...

A: We'll answer the first question since the exact one wasn't specified. Please submit a new question. ...

Q: Researchers recruited a sample of 40 female and 40 male heterosexual Caucasian undergraduate student...

A: The sample size is 40, population mean is 18.5, sample mean is 18.85, and sample standard deviation ...

Q: Which of the following is a benefit of a within-groups design over a between-groups design?

A: Given,, A multiple choice question:         To find, which of the following is a benefit of a within...

Q: An Internal Revenue Service official says, "The percentage of taxpayers who overpay the taxes they o...

A: Introduction: The “Missouri Rule” in setting up of the hypotheses is such that the claim is placed i...

Q: Use the traditional method. Be sure to include the null and alternative, significance level, critica...

A: Solution: The claim is to test if the herb ginkgo biloba is effective in preventing dementia. Let p1...

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 446 green peas ...

A: Find z-critical value: https://drive.google.com/file/d/1S_b_En4yZMZPhsaGfBA2eE_M0IJFOVeW/view?u...

Q: 4 cards are drawn at random from a standard deck, without replacement Find the probability that all ...

A: 4 cards are drawn at random from a standard deck, without replacement. We know that  Face cards are ...

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support...

A: Assume p=0.5 and q=0.5, as the population proportion is unknown Here, margin of error e = 0.01 The s...

Q: 1) students at a school took a 35-point exam.  Below is a random sample of exam scores. 25        35...

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case yo...

Q: Twenty years ago, 57% of parents of children in high school felt it was a serious problem that high ...

A: Given that 57% of the parents felt that it was a serious problem that high school students were not ...

Q: A psychiatrist is interested in finding a 98% confidence interval for the tics per hour exhibited by...

A: 1. For the given data, x¯=7.5455, from the excel function, =AVERAGE(E20:E30)s=4.6122, from the excel...

Q: Question 22: A least squares regression line : A- may be used to predict a value of y if the corres...

A: The equation of a least-square regression line is also called a prediction equation of the predictio...

Q: The overhead reach distances of adult females are normally distributed with a mean of 200 cm and a s...

A: Let "X" be the overhead rach distance in cm. Draw the normal curve and shade the area to the rig...

Q: The following statement appeared on a box of Tide laundry detergent: “Individual packages of Tide ma...

A: Given satement : “Individual packages of Tide may weigh slightly more or less than the marked weight...

Q: In a survey of 3905 adults, 719 oppose allowing transgender students to use the bathrooms of the opp...

A: Find z-critical value: https://drive.google.com/file/d/1S_b_En4yZMZPhsaGfBA2eE_M0IJFOVeW/view?...

Q: I'm using the t-distribution method, Line 29 under.95 =2.045 the equation is E =tc s/n so my questio...

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find th...

Q: A certain drug is used to treat asthma. In a clinical trial of the drug. 23 of 276 treated subjects ...

A: From the provided information, Population proportion (p) = 0.11 The hypotheses can be constructed as...

Q: In 2017, the entire fleet of light-duty vehicles sold in the United States by each manufacturer must...

A: Given information- Population mean, µ = 78 mg/mi Population standard deviation, σ = 6 mg/mi We have ...

Q: Given that ? = 36, use the t-score Table (Table IV, you can find a copy online or in the Blackboard ...

A: Since, n = 36 the degree of freedom will be 35(36-1). The given table shows the right tail area. Fro...

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

A: The hypothesized proportion is 0.79.

Q: Express the confidence interval 41.9%<p<49.9%41.9%<p<49.9% in the form of ˆp±Ep^±E.

A: The given confidence is interval is, 41.9%<p<49.9% The upper limit p^+E=49.9%The lower limit p...

Q: There is some evidence suggesting that you are likely to improve your test score if you rethink and ...

A:

Q: Since the last question got rejected, I will post the same one, but have points illustrated.   It's ...

A: State the hypotheses. That is, there is no evidence that the most of the adults would erase all of ...

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support...

A: Given Information Error = 7% = 0.07 Confidence level = 0.99

Q: question 15 I am not understanding how to find the t value and p value

A: Question 15: The test statistic is, t=x¯differenceSEdifference=-21.3493833.59961=-0.635 Thus, the te...

Q: A researcher believes that about 74% of the seeds planted with the aid of a new chemical fertilizer ...

A: It is an application of CLT . It is very useful in statistics .

Q: Consider a random walk over 3 webpages, 1, 2, 3. At any step, if the person is at webpage 1, then wi...

A:

Q: If n = 24, ¯xx¯ = 30, and s = 3, construct a confidence interval at a 98% confidence level. Assume t...

A: Given information Sample mean (x̅) = 30 Sample standard deviation s = 3 Sample size n = 24 98% confi...

Q: In a study of speed dating, male subjects were asked to rate the attractiveness of their female date...

A:   The sample mean and standard deviation are, Degree of freedom:df= n-1   = 12-1   = 11

Q: Twenty-five percent of the customers of a grocery store use an express checkout. In a random survey ...

A:

Q: Researchers look at the role of music on anxiety.  They believe the type of music will make a differ...

A: Solution:  Given information: n1=14 Sample size of classical music groupn2=14  sample size of Tecno ...

Q: Use the table to answer the question. Note: Round z-scores to the nearest hundredth and then find th...

A:

Q: In a test of physical fitness, a fitness trainer for a group of men ages 65 and older from a local r...

A: The population mean is known to be 20. Based on the sample evidence you have to test whether the pop...

Q: b. The test statistic is z = c. The​ P-value is Choose the correct answers below: Because the p-valu...

A:

Q: According to a college registrar's office 40% of the students enrolled in an introductory statistics...

A:

Q: In addition to meeting the Randomization Condition and the Independence Assumption, a 1-Sample t-Tes...

A: In addition to meeting the Randomization Condition and the Independence Assumption, a 1-Sample t-Tes...

Q: The Rocky Mountain district sales manager of Rath Publishing Inc., a college textbook publishing com...

A: 1] n=40 2] sample mean x¯=43 3] sample standard deviation s=6.4 4] μ=36

Q: I am having trouble with this question please please help!

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case yo...

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 446 green peas ...

A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is...

Q: Assume that the height of a type of tree has a normal probability distribution with a mean of 55.2 f...

A: Given that, Assume that the height of a type of tree has a normal probability distribution with a me...

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.