A school administrator claims that the mean IQ of all the students in their school is 126. A supervisor wants to test this claim. In the hypothesis testing made by the supervisor, she rejected the null hypothesis when the true population mean is 126. What type of error did the supervisor commit?

Q: Write the statistical hypotheses.

A: The information provided in the question are as follows : The researcher wants to test whether there…

Q: It is estimated that 3% of adults age 18 to 29 who have high blood pressure. You wish to test this…

A: We assign Null Hypothesis (H0) and Alternative Hypothesis (H1) The test statistic,…

Q: Researchers prefer conducting z tests because it gives us more than enough information to make…

A: Given statement:  Researchers prefer conducting z tests because it gives us more than enough…

Q: Explain about the COMMON THEME OF HYPOTHESIS TESTS.

A: Purpose of hypothesis test: The process of making inference regarding the population based on the…

Q: state the null and alternative hypothesis.

A: In 2012, it was reported that McDonald’s had 62 million customers per day. here hypothesized mean is…

Q: Your statistics instructor claims that 60 percent of the students who take her Elementary Statistics…

A: Given that,The total number of surveyed students is 64.Therefore, the sample size is The number of…

Q: Explain how a court trial is like hypothesis testing.  Include the steps of a hypothesis test and…

A: Hypothesis testing: The claim is typically referred to as a hypothesis, and the process of deciding…

Q: Phineas Phillips, from Philadelphia, has a fascination with fun phone facts. But Phineas has…

A:

Q: It currently takes users a mean of 3232 minutes to install the most popular computer program made by…

A:

Q: One personality test available on the World Wide Web has a subsection designed to assess the…

A: We have given that Mean(µ) = 140 Sample mean (x̅) = 134 Standard deviations (s) = 28

Q: Suppose a professor wants to know if students in her statistics class have a good grasp of basic…

A: Given: Sample size n=6 Sample mean x¯=∑i=1nXin=62+92+75+68+83+956=79.167 Sample standard deviation…

Q: While her husband spent 2½ hours picking out new speakers, a statistician decided to determine…

A:

Q: The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls, Iowa…

A: Given : The mean amount of money last year spent by customers at the Texas Roadhouse in Cedar Falls,…

Q: Perform a hypothesis test for a population mean and for a population proportion The board of…

A: Given Information:  Population mean  (u) = 6  Confidence level (reliability) = 90%  Alpha value =…

Q: Suppose Bob makes a 95% confidence interval and his result is (70, 90). True or false: We can tell…

A: Given Information: 95% confidence interval = (70,90)

Q: The director of research and development is testing a new medicine. She wants to know if there is…

A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made on…

Q: briefly describe the difference between estimation and hypothesis testing.

A: It is needed to discuss about the difference between estimation and hypothesis testing.

Q: If we can perform a census (i.e. collect data from the entire population), then we can forget about…

A: Given that If we can perform a census (i.e. collect data from the entire population), then we can…

Q: It currently takes users a mean of 2222 minutes to install the most popular computer program made by…

A: Claim : the new mean is now different from 22 minutes so that they can change their advertising…

Q: Suppose you want to test the claim that a population mean equals 38.  State the null hypothesis.

A: Given that, Claim: population mean equals 38.

Q: A statistician wishing to test a hypothesis that students score at least 75% on the final exam in an…

A: Solution :- Option :-   b. H0:  = 75 vs. Ha:  > 75. which is Right Tailed test of…

Q: Twelve husbands were asked how much housework they completed last week and how many children were in…

A: The statement accepted to be true is called the null hypothesis and the statement opposite to null…

Q: Follow the steps in hypothesis testing when solving this problem. In a study of diagnostic…

A: From given Given ,  Events:                               1    2    3    4    5    6    7    8    9…

Q: The school's newspaper reported that the proportion of students majoring in business is more than…

A: According to the given information in this question We need to identify the correct option

Q: A marketing agency wanted to determine if a new commercial changed people's opinion about a company.…

A: Statistical hypothesis means the decision about a population parameter. Here we look at the data we…

Q: psychologist wanted to know if students in her class were more likely to cheat if they were low…

A: ANSWER:After reviewing the data set, we need to determine whether the observed patterns support or…

Q: Explicate a null and alternative hypothesis in words and symbol and tell whether the test is…

A: Given: A librarian of school claims that all grade 7 students read an average 15 books a month. A…

Q: You want to determine if the proportion of people who will vote for the president next year has…

A:

Q: The magazine Tech Worx reported that  89%  of software engineers rate the company they work for as…

A: A sample of 225 randomly chose software engineers in which 216 rated the company they work for a "a…

Q: The algebra instructor predicts that the class average on the midterm exam will be greater than 85%.…

A: From the question,  Given that the algebra instructor predicts that the class average on the midterm…

Q: Discuss an example where the test of hypothesis with three or more population means could be used.

A: Here we want to discuss the example where the test of hypothesis with three or more population means…

Q: The Bureau of Labor Statistics reports that the official unemployment rate for Black people was…

A: Variables are of different types. The correct classification of variables and the identification of…

Q: Charlie tests whether there are more male or female coffee drinkers at his university's coffee shop.…

A: The number of customers (n) is 76.

Q: A researcher gathered a sample of participants who volunteered for a studying of phobias. She…

A: A researcher gathered a sample of participants who volunteered for a studying of phobias. She…