company claims that at least 94% of equipment supplied to a manufacturer is within specifications. A test of a sample of 200 pieces of equipment showed that 27 of them were faulty. Test their claim at the 5% significance level?

Q: Identify the null hypothesis, alternative hypothesis, test statistic, p-value, initial and final…

A: As the provided claim about the population in terms of proportion, the test statistic (single…

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: Statistical tests are used to calculate the test statistics which is eventually used to determine…

Q: An educational report asserts that 70% of all young adults start planning their career at the age of…

A: Sample proportion (p^) is point estimate of population proportion (p)  p^ =xn Test statistic : z =…

Q: Saeko owns a yarn shop and want to expands her color selection.         Before she expands her…

A:

Q: n an advanced ballet dance class, it is claimed that 42% of dancers can successfully perform a…

A: Given,   The sample proportion is,

Q: A national publishing house claims that 45% of all weekly magazine readers in South Africa read…

A: Given: House claims 45% of weekly magazine The significance level is 5% The magazine readers are 500…

Q: Suppose that the P‐value in a hypothesis test is 0.08. If the significance level for the test is…

A: Decision rule : Reject H0 if P-value  <  α

Q: A recent insurance industry report indicated that 40 percent of those persons involved in minor…

A:

Q: A researcher records the number of words recalled by students presented with a list of words for one…

A: The degrees of freedom is 48.

Q: adioShack reported that they sell 21% of all home computers. a) is this claim supported at the 1%…

A:

Q: 3. Are our kids getting taller? The average height of kindergartners in 1950 was 39.5 in. The data…

A:

Q: in a Gallup poll of 1003 randomly selected subjects, 370 said they have a gun in their home. The…

A: The probability of occurring the type I error is called level of significance or size of the…

Q: Last year, 46% of business owners gave a holiday gift to their employees. A survey of business…

A:

Q: A school psychologist designed a study to investigate the effectiveness of three study programs. A…

A: Given information: The data of n = 30 students is provided as: Program A: 12, 10, 15, 9, 8, 12, 6,…

Q: In a survey, 32% of the respondents stated that they talk to their pets on the telephone. A…

A: Givenn=200x=60p^=xn=60200=0.3H0:P=0.32H1:P<0.32α=0.05

Q: A simple random sample of front seat occupants involved in car crashes is obtained. Among 2780…

A: We have given that  Sample size n1 = 2780 , n2= 7731 Favorable cases x1= 37 , x2= 15

Q: concerned group of citizens wanted to know if the proportion of armed robberies in Texas was…

A:

Q: Based on a USA Today poll, 10% of the population believes that college is no longer a good…

A:

Q: A medical researcher wants to determine whether exercising can lower blood pressure. At a health…

A: (a) The medical researcher wants to determine whether exercising can lower blood pressure of 100…

Q: A national publishing house claims that 35% of all weekly magazine readers inSouth Africa read their…

A: Null Hypothesis: H0: The proportion of all weekly magazine readers in South Africa read their…

Q: The trustee of a company’s pension plan has solicited the opinions of a sample of the company’s…

A: In this case, it is needed to check whether the responses differ among three groups of employee.…

Q: A dog enthusiast wanted to see if there was a difference in pit-bull ownership between people in…

A: Given Information :  A dog enthusiast obtained a list of registered dog owners from the city of…

Q: In a survey of 247 households, it was found that 168 owners had a dog as a pet. In a survey of 282…

A:

Q: Using the 5% significance level does the scientist have sufficient evidence to conclude that: μ <…

A: It is given that P-value = 0.035 Level of significance = 5% = 0.05

Q: A concerned group of citizens wanted to know if the proportion of armed robberies in Texas was…

A:

Q: The following table shows the systolic blood pressure of 5 certified public accountants before tax…

A: The difference =before-after.

Q: researcher records the number of words recalled by students presented with a list of words for one…

A: To test the between the two groups the hypothesis of interest is     H0: μ1=μ2     Ha: μ1≠μ2 Under…

Q: A student wants to see if the number of times a book has been checked out of the library in the past…

A: The given table represents the number of times a book checked out of the library and the number of…

Q: r claim at a 0.10

A: number of times checked out number of pages 22 239 38 265 46 379 5 369 31 319 11 275…

Q: A healthcare provider saw that 48% of their members received their flu shot in a recent year. The…

A: Solution   p be the population proportion

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: given  P0 =0.37 n=170

Q: A student wants to see if the number of times a book has been checked out of the library in the past…

A: The correlation coefficient: r=cov(x,y)σxσy=∑i=115(x-x¯)(y-y¯)/nσxσy=538.20*53.1=0.1217 The equation…

Q: The owner of a football team claims that the average attendance at games is over 80,000, and he is…

A: Test is that whether the average attendance at games is over 80,000.

Q: A school psychologist designed a study to investigate the effectiveness of three study programs. A…

A: A sample of 30 students were randomly selected and assigned to one of the three programs. Here…

Q: A real estate software program gives the estimated values of homes and lists characteristics of the…

A: It is given that the prospective home buyer wants to investigate that there is an association…

Q: In this exercise, we are conducting many hypothesis tests to test a claim. Assume that the null…

A:

Q: In the hypothesis testing procedure, a is 1 - level of significance. Select one:

A: In the hypothesis testing,   The significance level is represented by the letter α. The Confidence…

Q: A random sample of 815 births included 427 boys use a 0.5 significance level to test the claim that…

A:

Q: A marketing company claims that it receives 8% responses from its mailing. To test this claim, a…

A: Given: p0=0.08x=25n=500p^=xn=25500=0.05

Q: A national publishing house claims that 28% of all weekly magazine readers in SA read their…

A: Given X=104 n=400

Q: Asha owns a car-wash and is trying to decide whether or not to purchase a vending machine so…

A: Power of test depends on 4 factors namely-sample size, standard deviation, effect size and…

Q: The accompanying table shows the results of challenged referee calls in a major tennis tournament.…

A: Hypotheses: The two categories of interest are the “gender” and “Status of call overturned”. The…

Q: A student wants to see if the number of times a book has been checked out of the library in the past…

A: Regression: In order to obtain the least square regression line, first perform regression analysis…

Q: An educational report asserts that 70% of all young adults start planning their career at the age of…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: In a Gallup poll of 1003 randomly selected subjects, 370 said they have a gun in their home. The…

A: Solution. Test of p = 0.40vs p not = 0.40 So the Null hypothesis is p = 0.40 And p value = 0.0443

Q: A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC) students…

A: Given that  A statistics instructor believes that fewer than 20% of Evergreen Valley College (EVC)…

Q: A Two tailed test, where the null hypothesis is H0: p = 0.95 and the significance level is 10%. When…

A: We know, Pp^≤0.9399|p=0.95=0.05Pp^-pp(1-p)n≤0.9399-0.950.95×(1-0.95)n=0.05PZ≤-0.0463×n=0.05 Using…

Q: determine the values of *, **, ***, **** (iv) conduct a hypothesis test at the 5% significance level…

A: iii) In this case, the dependent variable is Growth and the independent variables are Water and…

Q: A simple random sample of front seat occupants involved in car crashes is obtained. Among 2780…

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