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11. Flipping coins: We flipped 40 coins, and observations are obtained as 25 Head and 15 Tail. Please test the variance to find out if there is a significant difference between the observation an...
Suppose you want to determine whether there is a significant difference in mean test scores for...
Suppose you want to determine whether there is a significant difference in mean test scores for females and males. The test is out of 600 points. Using the following hypotheses: Ho: U1 - U2 = 0 HA: U1 - U2 (not equal) 0 And alpha of 0.05 you obtain the following results t-test Two-sample assuming unequal variances Females Males Mean 525 487 Variance 3530.8 2677.818182 Observations 16 12 Hypothesized Mean Difference 0 df 25 t stat 1.803753 P (T<=t) one...
2. [25 POINTS = 15+101 BONNIE (WHO WORKS AS INSURANCE ANALYST) COLLECTED DATA FOR TWO INDEPENDENT...
2. [25 POINTS = 15+101 BONNIE (WHO WORKS AS INSURANCE ANALYST) COLLECTED DATA FOR TWO INDEPENDENT GROUPS OF CAR POLICIES, EACH GROUPS INCLUDED n1 = n2 8 MONTHLY PREMIUM VALUES. BONNIE ASSUMED THAT THE POPULATION VARIANCES FOR TWO GROUPS ARE KNOWN AS (σ)-(o2)2 = 9 SAMPLE SUMMARIES WERE FOUND AS FOLLOWS (SAMPLE MEAN FOR GROUP I) = 33.40 AND (SAMPLE VARIANCE) = 7 (SAMPLE MEAN FOR GROUP II)-37.30 AND (SAMPLE VARIANCE)-11 AT THE 1% SIGNIFICANCE LEVEL, DOES BONNIE HAVE SUFFICIENT...
could anyone help me those questions? Question 7 Not yet answered Points out of 1 P...
could anyone help me those questions?
Question 7 Not yet answered Points out of 1 P Flag question You are offered the following gamble: Flip two fair coins. If at least one head comes up, you win $12. If not, you lose $24. What is the expected value of this gamble? Select one: a. $3 c. $0 Question 8 Not yet answered Points out of 1 Suppose X is a random variable. How are the variance and standard deviation of...
1. To test whether or not there is a difference between treatments A, B, and C,...
1. To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments. You are given the results below. Treatment Observation A 20 30 25 33 B 22 26 20 28 C 40 30 28 22 The null hypothesis is to be tested at the 1% level of significance. The p-value is: 2. Question 12 Not yet answered Points out of 2.0 Remove flag...
I need these questions answered please. 6. YChapter 11) In a pediatric clinic, a study is carried out to see how effective aspirin is in reducing temperature. Five 4-year-old children suffering...
I need these questions answered please.
6. YChapter 11) In a pediatric clinic, a study is carried out to see how effective aspirin is in reducing temperature. Five 4-year-old children suffering from influenza had their temperature taken immediately before and 1 hour before administration of aspirin. Assuming the normality of data, we constructed 99% confidence interval for the mean difference in temperature before/after taking an aspirin. The 99% confidence interval is (-0.75, 3.95). If you perform the hypothesis test, what...
please help! Following is a simple linear regression model: y = a + A + &...
please help!
Following is a simple linear regression model: y = a + A + & The following results were obtained from some statistical software. R2 = 0.523 Syx (regression standard error) = 3.028 n (total observations) = 41 Significance level = 0.05 = 5% Variable Interecpt Slope of X Parameter Estimate 0.519 -0.707 Std. Err. of Parameter Est 0.132 0.239 Note: For all the calculated numbers, keep three decimals. Write the fitted model (5 points) 2. Make a prediction...
Which of the following statements describe a Type II error? astion 11 yet swered rked out...
Which of the following statements describe a Type II error? astion 11 yet swered rked out of Flag estion Select one: a. Stating that there was an effect when actually there was no effect. O b. Stating that there was no effect when in fact there was an effect. c. Saying that a person is guilty as charged when in fact the person is innocent O d. A researcher rejects a true null hypothesis. RE ion 12 Confidence intervals are...
1.a. Conduct a two-sample t-test to find out if there is a significant difference between U.S. stock returns and U.S. corporate bond returns using the monthly data covering the sample period 1980-2017...
1.a. Conduct a two-sample t-test to find out if there is a
significant difference between U.S. stock returns and U.S.
corporate bond returns using the monthly data covering the sample
period 1980-2017. 1.b. Conduct a two-sample t-test to find out if
there is a greater returns for U.S. stock as compared to U.K. stock
returns using the monthly data covering the sample period
1980-2017. 2. Estimate a multiple linear regression relationship
with the U.K. stock returns as the dependent variable,...
1. A salesperson has successes on 2 out of 10 cold calls. What is the probability...
1. A salesperson has successes on 2 out of 10 cold calls. What is the probability of getting 3 successes in 9 cold calls? 2. If the probability of success on a cold call is .20, and 500 cold calls are made, what is the probability of less than 84.5 successes? (use normal distribution to approximate the binomial, so need mean = np and st.dev = sqrt(npq) ) 3. In the past, the probability of success of a cold call...
Please use a two tailed test and a= .05 for all tests One-sample t-test A researcher...
Please use a two tailed test and a= .05 for all tests
One-sample t-test A researcher was interested in examining the effect of exercise on happiness levels among college students. The average college student happiness levels is u = 30. A sample of 5 individuals was selected and asked to exercise for three weeks. And then, they were asked to report their happiness scores. Can he conclude that exercise influences happiness levels ? Happiness 37 32 33 36 32 1)...
2. [25 POINTS = 15+101 BONNIE (WHO WORKS AS INSURANCE ANALYST) COLLECTED DATA FOR TWO INDEPENDENT GROUPS OF CAR POLICIES, EACH GROUPS INCLUDED n1 = n2 8 MONTHLY PREMIUM VALUES. BONNIE ASSUMED THAT THE POPULATION VARIANCES FOR TWO GROUPS ARE KNOWN AS (σ)-(o2)2 = 9 SAMPLE SUMMARIES WERE FOUND AS FOLLOWS (SAMPLE MEAN FOR GROUP I) = 33.40 AND (SAMPLE VARIANCE) = 7 (SAMPLE MEAN FOR GROUP II)-37.30 AND (SAMPLE VARIANCE)-11 AT THE 1% SIGNIFICANCE LEVEL, DOES BONNIE HAVE SUFFICIENT...
could anyone help me those questions?
Question 7 Not yet answered Points out of 1 P Flag question You are offered the following gamble: Flip two fair coins. If at least one head comes up, you win $12. If not, you lose $24. What is the expected value of this gamble? Select one: a. $3 c. $0 Question 8 Not yet answered Points out of 1 Suppose X is a random variable. How are the variance and standard deviation of...
I need these questions answered please.
6. YChapter 11) In a pediatric clinic, a study is carried out to see how effective aspirin is in reducing temperature. Five 4-year-old children suffering from influenza had their temperature taken immediately before and 1 hour before administration of aspirin. Assuming the normality of data, we constructed 99% confidence interval for the mean difference in temperature before/after taking an aspirin. The 99% confidence interval is (-0.75, 3.95). If you perform the hypothesis test, what...
please help!
Following is a simple linear regression model: y = a + A + & The following results were obtained from some statistical software. R2 = 0.523 Syx (regression standard error) = 3.028 n (total observations) = 41 Significance level = 0.05 = 5% Variable Interecpt Slope of X Parameter Estimate 0.519 -0.707 Std. Err. of Parameter Est 0.132 0.239 Note: For all the calculated numbers, keep three decimals. Write the fitted model (5 points) 2. Make a prediction...
Which of the following statements describe a Type II error? astion 11 yet swered rked out of Flag estion Select one: a. Stating that there was an effect when actually there was no effect. O b. Stating that there was no effect when in fact there was an effect. c. Saying that a person is guilty as charged when in fact the person is innocent O d. A researcher rejects a true null hypothesis. RE ion 12 Confidence intervals are...
1.a. Conduct a two-sample t-test to find out if there is a
significant difference between U.S. stock returns and U.S.
corporate bond returns using the monthly data covering the sample
period 1980-2017. 1.b. Conduct a two-sample t-test to find out if
there is a greater returns for U.S. stock as compared to U.K. stock
returns using the monthly data covering the sample period
1980-2017. 2. Estimate a multiple linear regression relationship
with the U.K. stock returns as the dependent variable,...
Please use a two tailed test and a= .05 for all tests
One-sample t-test A researcher was interested in examining the effect of exercise on happiness levels among college students. The average college student happiness levels is u = 30. A sample of 5 individuals was selected and asked to exercise for three weeks. And then, they were asked to report their happiness scores. Can he conclude that exercise influences happiness levels ? Happiness 37 32 33 36 32 1)...
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