The digital marketing specialist would like to test the claim that the percent of customers who use online coupons when making an online purchase is different than 75%. Sample size =80 online customers Sample proportion =0.90  z0=

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

A: Given dataA psychologist wanted to know if students in her class were more likely to cheat if they…

Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: Suppose a researcher wants to estimate the population proportion of defective light bulbs. He took a…

A:

Q: A research study was conducted about gender differences in sexting, the sending of sexually explicit…

A: Given Girls x1=156n1=2169   Boys x2=183n2=2231   α=0.05

Q: If you were really a television network executive, you would not hire multiple market research firms…

A: In this problem, we have to find which one of the given explanations is correct for why we care…

Q: The XYZ company wants to see if interview scores predict job performance scores. So it goes back…

A: The claim is to check whether there is a relationship between employee interview scores and employee…

Q: The z for a sample mean hypothesis test compares a sample mean to another mean. In these situations,…

A: From the above data We are given that the The z for a sample mean hypothesis test compares a…

Q: Q3 Below is a table showing the number of people in three different groups experience abdominal pain…

A: The chi-square test is used to estimate whether there is any significant difference between the two…

Q: If you are analyzing statistical data from a range of percentages of participant responses and…

A: If you are analyzing statistical data from a range of percentages of participant responses and…

Q: The Federal Pell Grant Program gives grants to low-income undergraduate students. According to the…

A: Solution According to guidelines we solve first question

Q: A political scientist claims that 38% of first-year college students characterize themselves as…

A: The hypothesized proportion is 0.38, n=500 and x=215.

Q: What kind of test is used to solve the test statistic value for the population proportion?

A: We want to tell you what kind of statistic and test are used for population proportion.

Q: the variance of a data set is 144 and mean is 72 then coefficient of variance is

A: Given,variance(σ2)=144mean(x¯)=72

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

A:

Q: Is veganism more common than it used to be? In 2012, it was reported that 2% of Americans were…

A: The random variable adults living in the United States in 2019 who are vegan follows normal…

Q: Is there a difference in greater percentage of popped kernels using name-brand microwave popcorn…

A: Assume that the percentages of popped kernels for Name-brand and that for Store-brand are…

Q: In this investigation, you learn how to decide if a value of x2 is statistically significant. How…

A: Here we have been provided with two samples falling into various categories. We will use Chi-Square…

Q: A of researchers are studying the difference in ethical perceptions between male and group female…

A: Solution: Given information: n1= 50  Sample size of female n2= 50  Sample size of male x1= 48 female…

Q: The sample mean and sample variance of five data values are, respectively, x¯ = 104 and s 2 = 4. If…

A:

Q: A coworker says she needs to test 5000 subjects in order to have enough power to detect a…

A: Here for the above question, effect size is related with a sample size. As we know a test is…

Q: If your critical value is ±1.96 and your z-value is -2.44, do you reject that the sample mean…

A: From the given information,   Critical Value: ±1.96 z-value: -2.44

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Texas…

A: The independent sample z test, compares the mean difference between two independent population…

Q: A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana…

A: Given,n=400x=144p^=xnp^=144400=0.36

Q: A research study was conducted about gender differences in sexting, the sending of sexually explicit…

A:

Q: A fast-food restaurant manager believes that 27% of customers who order Double Whopper Cheeseburgers…

A: The random variable X follows normal distribution. We have to find the test statistic. This is…

Q: Are freshmen psychology majors more likely to change their major before they graduate compared to…

A: Given Information :   344 of the 618 freshmen psychology majors from a recent study changed their…

Q: A research study was conducted about gender differences in sexting, the sending of sexually explicit…

A: A two proportion z-test allows you to compare two proportions to see if they are the same. The null…

Q: Suppose we have the results of a Gallup survey (simple random sampling) which asks participants for…

A:

Q: hat is a percentile and how do we plot them on box and whisker plots?

A: Percentile is the value in statistics which divides the population in two groups. The certain…

Q: A research study was conducted about gender differences in sexting, the sending of sexually explicit…

A: Therefore the correct option is Yes p^girls=xn=1562169=0.0719 p^boys=xn=1832231=0.0820…

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: PAIRED T-TEST: The paired t test is also defined as dependent- t test.  This test is used to test…

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Utah…

A: Dear students as per guidelines we answer the first three subparts only when multiple subparts are…

Q: does this mean that the answer saying "The sample statistic equation is correct to use when the data…

A: Yes you are correct. The sample is the the subset of the population.

Q: In spss, what test can you do to compare the score of variables?

A: As per the question we have to compare the score of variables if we have 2 independent samples, we…

Q: On election day, a local TV news organization stayed at three polling locations in Fairfield county…

A: Given:  The total number of votes for candidate A in the election for the US Senate seat are n=2790.…

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in…

A: (a) State the hypotheses.

Q: The sample data here is the cholesterol levels for 10 men diagnosed with high cholesterol. The first…

A: Result Option 3 is correct. The mean cholesterol level of males who take the medicine is lower than…

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: Paired t test:The paired t test is also defined as dependent- t test. It is used to test the mean…

Q: In a certain population, the mean price of the stock prices was 230, the median was 255, the…

A: Given data Mean price = 230 Median = 255 Variance = 1225 Q1 = 240 Q3 = 270 Second quartile is median…

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Utah…

A: x y 27060 29769 42320 48859 36445 32480 37895 36288 44564 45102 35325 46219 30313…

Q: One study found a negative correlation between participant’s age and hours of sleep they got (as…

A: The strength and direction of linear relationship between two variables is measured by correlation.…

Q: You collect information on a random sample of women and obtain estimates on vitamin D exposure.…

A: The variability shows the difference between the sample data from the population data. For example,…

Q: In a 25-unit sample of a variable with a population average of 50, the Mean was 53 and the variance…

A: To find: The value of the test statistic As here Sample size is less than 30. We use t-test…

Q: If a person’s z score equals 1.61, what percentage of the observations are more extreme?

A:

Q: A social science teacher wants to compare the perception of students towards activism before and…

A: The dependent variable must be continuous. When data are present in dependent format [ i.e after…

Q: A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Texas…

A: There are two independent samples which are Texas and Virginia. We have to test whether the mean…

Q: A research study was conducted about gender differences in sexting, the sending of sexually explicit…

A:

Q: A political scientist claims that 38% of first-year college students characterize themselves as…

A: The hypothesized proportion is 0.38.

Q: When the number of data is lesser than 30, what test – statistic are we going to use? How about when…

A: Let, there are two sets of data. One has lesser than 30 and another has more than 30 data. The test…

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

A: Given information: The data represents the ratings of cheating for three achievement group.