Use the appropriate table or calculator to find the following: (a) ta for a 80% hypothesis test, two tailed, with a sample of size 90 +/- (b) ta for a 90% hypothesis test, two tailed, with a sample of size 36 +/-

Q: hen creating a 99% CI based on data from one sample the size of n=31, which t value should be used?

A: Given: n=31 The degree of freedom=n-1=31-1=30 The level of significance (α)=0.01 We see inside the…

Q: If you ran a factorial ANOVA using gender and social class, with the latter categorized as low,…

A: Given: Gender - Female , Male  Social class - Low , Medium , High

Q: A researcher randomly selects 1000 death certificates and, after interviewing the attending…

A: Given:- The contingency table is given as;   Cancer Heart Disease Other Total Smoker 135 310…

Q: An analysis of variances produces dfbetween 4 and dfwithin 80. How many people were in each…

A: Given:  Degrees of freedom between the group=5  And degrees of freedom within the group=80  Then to…

Q: Z-statistic

A: Givenz-statistic=x-μ0σ/n

Q: An analysis of variance produces SSbetween = 30, SSwithin = 60, and an F-ratio with df = 2, 15.  For…

A:

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A:

Q: A researcher concluded that a patient was in the risk group of developing a rare disease based on…

A: Solution: Here, hypotheses for this test can be written as follows: H0: A patient was NOT in the…

Q: kindly assist,   An epidemiologist who is working in Capricorn Department of Health investigated…

A: We have given that  Sample size n =10000 Favorable cases x =275 Sample proportion p^=x/n  =275/10000…

Q: According to a certain government agency for a large country, the proportion of fatal traffic…

A: The sample size is 108, and population proportion is 0.36. Checking condition:…

Q: or r=0.7789 and sample size=10, the corresponding t value is:"     2.512     3.512     3.034…

A: r = 0.7789 , n = 10

Q: The results of a study that used an independent samples t-test was t(28) = 2.14, p = .01. Based on…

A: t(28) means that degree of freedom  = 28 Now, degree of freedom for a t-test one sample case  = n-1.

Q: a total of 20 applicants came in for a job interview. Among them, four were 45 years old, six were…

A: Given Data : X f 45 4 39 6 42 3 40 5 35 2 N = 20 Mean =x =∑fxN Var=1N∑fx2-x2 SD=Var

Q: If you were assigned to develop an experiment to determine if adding specific insecticides will kill…

A: Qualitative research is the process of gathering and evaluating non-numerical data in order to…

Q: If the data is weight, the z-score for someone who is overweight would be what?? if the data is…

A: Also known as standard score, z-scores are a way to compare two scores that may or may not be from…

Q: A company manufactures cell phones. In August, a random sample of 125 cell phones was inspected, and…

A:

Q: In carrying out chi-square analysis, if one or more of the observed frequencies is less than five…

A: Given statement: In carrying out chi-square analysis, if one or more of the observed frequencies is…

Q: For a population with µ = 40 and σ = 8, what is the z-score corresponding to X = 34?

A: Given  µ = 40 and σ = 8 , X=34

Q: Assume you did an experiment with 3 groups and 16 subjects per group. The sample variances in the…

A: It is given that, an experiment with 3 groups and 16 subjects in per group. Thus,

Q: In SPSS , for a one sample t test, to find your p value for a one tailed test, multiply the p value…

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Q: An independent-measures study is analyzed using the appropriate t-test, and the APA summary is t(56)…

A: Introduction: Denote μ1, μ2 as the true population means for the two groups being compared.

Q: Use the given sample to construct a 95% conf estimate the population standard deviation o Bample…

A: s2= 72=49 The critical values for \alpha = 0.05α=0.05 and df = 19df=19 degrees of freedom are…

Q: When companies are designing a new product, one of the steps typically taken is to see how potential…

A: From the given information, Computer A has 45 elements. That is, n1=45 Computer B has 40 elements.…

Q: How many subjects participated in an independent-samples t-test if a researcher reports, t (20) =…

A: Given information- We have given an independent-samples t-test. The value of test statistics is- t…

Q: A researcher is interested in differences among blondes, brunettes, and redheads in terms of…

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

Q: The grades of a sample of 9 students on a prelim exam (x) and on the midterm exam (y) are shown in…

A: Let X denote the prelim exam Let Y denote the midterm exam Calculation:

Q: For a population with μ = 80 and σ = 6,what is the z-score corresponding to X = 68?

A:

Q: A Doctor is interested in the proportion of Lyon county residents who were infected with covid-19…

A: a) It is given that the Doctor is interested in the proportion of Lyon county residents who were…

Q: A die was thrown 9000 times and of these 3220 yielded a 3 or 4. Can the die be regarded as unbiased…

A:

Q: The predicted outcome of the 2020 US election was 5/9 in favour of Joe Biden. What is the average…

A: Here we want to Know average information content of this process.

Q: wo-tailed test with a =.05, use Table B.6 to determine how large a Pearson correlation is necessary…

A: a =0.05 Ans (a) n=6 The formula to calculate the degrees of freedom is, df=n-2=6-2=4 For a…

Q: Q2: The analysis of cement sample for a concrete specification mixture is summarized by conformance…

A:

Q: A hospital has studied its patient history and had concluded that 2% of patients that have been…

A: Given: 2% of patients have been admitted with staff bacteria.

Q: For each of the four variables Total Income, Monthly Payment, Utilities, and Debt, see the attached…

A: Given information: The data represents the values of sample means, standard deviations and standard…

Q: A calibration study needs to be conducted to see if the readings on 15 test machines are giving…

A: Given : Total Machines = 15 We have to select 5 out 15

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Step 2: n1=135 n2=175 x1=14 x2=8 The sample proportion of p^1 is, p^1=x1n1    =14135   =0.104

Q: dents in the sections of principles in statistics are consid

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Q: A sample of 300 items was selected. compute the p-value

A:

Q: A researcher used a sample of n = 50 individuals to determine whether there are any preferences…

A: Given :  A researcher used a sample of n = 50 individuals to determine whether there are any…

Q: According to the GSS 2018 dataset, 51% of 218 college graduates reported being interested in…

A:

Q: with that of the shock absorbers pro -n, one of the manufacturer's and one cted and installed on the…

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Q: A telephone company claims that more than 15% of its customers have at least two telephone lines.…

A: It is given that Sample size n = 250 Number of customers who have at least two telephone lines, X =…

Q: On average, a sample of n = 36 scores will provide a better estimate of the population mean than a…

A: We have to identify trueness of statement.

Q: Based on these tables, would you accept or reject the hypothesis that individuals in bad…

A: From the given output table it is clear that there are two groups good neighborhood and bad…

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A: Given data : x1= 14.0 n1= 135 x2= 8.0 n2= 175

Q: A random sample of 100 voters is taken to estimate the proportion of a state’s electorate in favor…

A: Here, the sample size is 100 and the proportion of a state’s electorate in favor of increasing the…

Q: The manufacturer of a new racecar engine claims that the proportion of engine failures due to…

A:

Q: Below are the research questions of four studerts and the statistical tests they used in orderto…

A: Mann Whitney U test: Mann Whitney U test is the nonparametric test, which is used for testing…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.