A law enforcement agent hypothesizes that more than 25% of the drivers stopped on Saturday nights for speeding are under the influence of alcohol. A sample of 50 drivers were stopped for speeding on a Saturday night. 14 of the drivers in the sample were under the influence of alcohol. Use α = 0.05 to test the followinghypotheses:           H0 : p ≤ 0.25           Ha : p > 0.25 Compute the test statistic.

Q: A random sample of 50 lumbar supports used by go-cart racers were subjected to a crash test, and…

A:

Q: A random sample of 50 lumbar supports used by go-cart racers were subjected to a crash test, and…

A: We have given that  Margin of error =E = 0.02 Sample size n =50 Favorable cases x =18 Sample…

Q: An air quality instrument logs 0 when standards are not met and 1 when standards are met.  First,…

A: When testing the hypothesis for population proportion, a binomial assumption is made. And if the…

Q: The police department wanted to know if 911 calls came in more often on some days of the weekend.…

A: Number of categories, k = 3 The degree of freedom is, df=k-1   =3-1   =2 The level of significance…

Q: The height of men in the US in 1950 was normally distributed with u = 177.1 cm and o = 7 cm The 5%…

A: The height of men in the US in 1950 was normally distributed with µ = 177.1 cm and σ = 7 cm.

Q: As a researcher using ANOVA, in order to reject the null hypothesis, we need the F ratio to be:…

A: F- test for ANOVA: The F test is to determine whether the means of more than two groups are equal.…

Q: The following data were obtained from a company that manufactures special plastic containers that…

A: Given information: The data represents the observed counts of each of the three 8-hour shifts versus…

Q: According to the American Pet Products Manufacturers Association, cat owners spend an average of…

A:

Q: n equal to 0.0145 a 95% confidence that pportion of children road traffic lies betwee 11.18% II pr…

A: Random Samples of 345 cases taken R output is given We have to analyze the result and have to choose…

Q: a random sample of 10 steel rods from this manu_fac_ture, the ten_sile stren_gths of at le_ast two…

A:

Q: ggests that the median rent for one-bedroom apartment in a community is $325 per week.   A sample of…

A: Given data: 420 460 514 405 320 435 350 531 450 560 309 325 The level of significance is…

Q: The PDF of random variable x is given as, 0.3507 Jx, 0<x<3 1,(x): 0, otherwise Find the, Mean

A:

Q: The test statistic of z=−1.94 is obtained when testing the claim that p<0.42. a. Using a…

A:

Q: For a one tailed test evaluating a treatment that is supposed to decrease scores, a researcher…

A: The null and alternative hypotheses are;The null hypothesis states that the scores are unaffected by…

Q: In the tt-test of significance for the hypotheses H0​:μ=11 and Ha​:μ<11, the value of the test…

A: H0​: μ = 11 Ha​: μ &lt; 11

Q: A researcher obtains t=2.25 for a repeated measures study using a sample of n=10 participants. Based…

A: For alpha level 0.05: The degrees of freedom, df=n-1=10-1=9 The degrees of freedom is 9. Computation…

Q: A veterinarian claims that the mean weight of adult German shepherd dogs is 75 pounds.  The test…

A:

Q: According to the Malaysian Diabetes Association, 25% of Malaysians aged 60 years or older had…

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

Q: Find the mean of the random variable X with PDF S 32² if 0 <x < 1, otherwise. f(x) =

A: Given : The probability distribution  function f(x) To find : Mean of the  random variable X

Q: The test statistic of Z equals=−2.06 is obtained when testing the claim that p&lt;0.58    Using a…

A:

Q: A soft-drink machine at a steak house is regulated so that the amount of drink dispensed is…

A: Given, Sample size, n = 16 Population mean, μ = 210 Population standard deviation, σ = 12 To test H0…

Q: The test statistic of z=−1.58 is obtained when testing the claim that p<0.75. a. Using a…

A:

Q: tion of 0.5 kilogram. To test the hypothesis that μ=15μ=15 kilograms against the alternative that…

A: Given: μ=15, σ=0.5 The critical region is defined as X¯&lt;14.9

Q: The table below gives the amount of time students in a class studied for a test and their test…

A:

Q: The test statistic of z=−1.76 is obtained when testing the claim that p<0.85. a. Using a…

A:

Q: A physician hypothesizes that females have higher systolic blood pressure than males.  The physician…

A:

Q: Compute the average value of p2 – x +1 over the interval [-1, 1].

A: We have to compute the average value of f(x)=x2-x+1 over the interval -1,1 We know that the average…

Q: A random sample of 430 observations produced a sample proportion equal to 0.39. Find the critical…

A: Given that, p^= 0.39 And sample size, n= 430 We know that, q^= 1-p^=1-0.39  q^=0.61

Q: The one-sample t statistic from a sample of n = 19 observations for the two-sided test of Ho : u = 6…

A:

Q: Let the random variable X denote the number of trials in ecess of r that are ed to achieve the r-th…

A: Given that,   The random variable X as the number of trails in excess of r that are required to…

Q: The test statistic of z=−3.03 is obtained when testing the claim that p<0.75. a. Using a…

A: Given,Test statistic(Z)=-3.03claim : P&lt;0.75and the given test is left-tailed test.…

Q: Random sample of 8 observations are taken to determine if there is evidence that the concentration…

A:

Q: The test statistic of z=−2.07 is obtained when testing the claim that p<0.85. a. Using a…

A: Given  Test statistics=Z=-2.07 P-value&lt;0.85  Level of significance=alpha=0.05

Q: To test the null hypothesis that the population mean is not bigger than 30 at the ten percent level…

A: Solution: Given information: n= 89 Sample size  x= 32 Sample variance s2= 64 Sample variance μ= 30…

Q: A series of tests of fire prevention sprinkler systems that use a foaming agent to quell the fire…

A: Computation of test statistic value: Sample size is smaller than 30 and the population standard…

Q: A tax accountant would like to test the claim that the proportion of individuals who owe when filing…

A:

Q: A researcher conducted a t-test for independent samples to evaluate the mean difference between two…

A:

Q: The probability that the percentage of salts in sand from a particular source does not match is 0.1,…

A:

Q: A pharmcuticle company claims that its new drug reduces systolic  blood pressure. The systolic blood…

A: SolutionLet D =(blood pressure before taking new drug)­ – (blood pressure after taking new drug) and…

Q: To test H0: μ = 50 versus H1: μ < 50, a random sample of size n = 24 is obtained from a population…

A:

Q: The test statistic of z=−3.21 is obtained when testing the claim that p<0.79. a. Using a…

A: a) State the hypotheses. That is, the population proportion equals 0.79. That is, the population…

Q: Given the test statistic -1.6752 from a Welch's T-test with H0: u1-u2= 0 vs Ha: u1-u2 does not equal…

A:

Q: A sample of n = 16 scores produces a t statistic of t = 2.00. If the sample is used to measure…

A: From the given information, n=16 and t=2.00

Q: For the coefficient of an independent variable to be statistically significant and accepted as a…

A: P-value: The  probability that sample mean would take a value as extreme or more extreme than…

Q: An article in Knee Surgery, Sports Traumatology, Arthroscopy (2005, Vol. 13, pp. 273-279),…

A: Provided information is, an article in knee surgery, considered meniscal repair with an absorbable…

Q: (a) The content volume of 10 car lubricants from Brand X were recorded as in Table 1. Using a=0.01,…

A: Both ques aren't related, hence answering Q.a.One sample t test

Q: The test statistic of z=−1.83 is obtained when testing the claim that p<0.49. a. Using a…

A: Given : The test statistic of z=−1.83 is obtained when testing the claim that p&lt;0.49.

Q: While trying to convince her friends that more than half of all sophomores live off-campus, Bren…

A: Given: Claim : More than half of all sophomores live off-campus.

Q: If the random variable X has the rectangular distribution over (0,1) show that the MGF of the random…

A:

Q: A machine fills 12-ounce bottles with soda. For the machine to function properly, the standard…

A: Given, n = 8 σ = 0.02 The sample data is 12.04  11.91  11.91  11.91  11.91  11.97  12.01  12.06…